protected override void Initialise()
{
Resource.EnableResourceTracking();
Camera3D camera = new Camera3D();
camera.LookAt(Vector3.Zero, new Vector3(0, 0, 5), Vector3.UnitY);
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//create a shader to display the geometry (this is the same as tutorial 02)
Vector3 lightDirection = new Vector3(1.0f, 0.5f, 0.5f);
MaterialShader material = new MaterialShader(new MaterialLightCollection());
material.UsePerPixelSpecular = true;
material.Lights.AmbientLightColour = Color.CornflowerBlue.ToVector3() * 0.5f; //set the ambient
material.Lights.AddDirectionalLight(true, lightDirection, Color.Gray); //add the first of two light sources
material.Lights.AddDirectionalLight(true, -lightDirection, Color.DarkSlateBlue);
material.SpecularColour = Color.LightYellow.ToVector3(); //give the material a nice sheen
//create a simpler shader to display the wireframe (and also used for the bounding cube)
Xen.Ex.Shaders.FillSolidColour simpleShader = new Xen.Ex.Shaders.FillSolidColour();
simpleShader.FillColour = Vector4.One * 0.01f;
Vector3 sphereSize = new Vector3(0.5f, 0.5f, 0.5f);
//create the complex sphere, this will have ~100k triangles.
//pass in a shader for wireframe rendering
sphere = new GeometryDrawer(new Xen.Ex.Geometry.Sphere(sphereSize, 200), material, simpleShader);
//create the bounding cube
sphereBoundingBox = new GeometryDrawer(new Xen.Ex.Geometry.Cube(sphereSize), simpleShader, null);
//create the occluding cube, and position it close to the camera
cube = new GeometryDrawer(new Xen.Ex.Geometry.Cube(Vector3.One), material, null);
cube.position = new Vector3(0, 0, 2.75f);
//add the cube first (so it can draw first, potentially occluding the sphere)
//if the cube was added second, it would have no effect, as it would draw after the sphere
drawToScreen.Add(cube);
//create the predicate, passing in the sphere and bounding box
Xen.Ex.Scene.DrawPredicate predicate = new Xen.Ex.Scene.DrawPredicate(sphere, sphereBoundingBox);
//add the DrawPredicate (the DrawPredicate draws it's children)
drawToScreen.Add(predicate);
//statistic overlay
statOverlay = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(statOverlay);
}
protected override void Initialise()
{
//initialize the physic stuff!
physics = new PhysicsSystem();
physics.CollisionSystem = new CollisionSystemSAP();
//all draw targets need a default camera.
//create a 3D camera
var camera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero, false);
//don't allow the camera to move too fast
camera.MovementSensitivity *= 0.1f;
camera.LookAt(new Vector3(0.0f, 100.0f, 0.0f), new Vector3(640.0f, 300.0f, 640.0f), Vector3.Up);
console = new Console(400, 200);
//create the draw target.
this.drawToScreen = new DrawTargetScreen(camera);
//Set the screen clear colour to blue
//(Draw targets have a built in ClearBuffer object)
this.drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//create new actor ("tiny")
actor = new Actor(this.Content, "tiny_4anim", Vector3.Zero, 1f);
skydome = new Skydome(Content, new Vector3(500,100,700), 1000f);
//at runtime, pressing 'F12' will toggle the overlay (or holding both thumbsticks on x360)
this.statisticsOverlay = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
TerrainDrawer terrain = new TerrainDrawer(this.Content, Vector3.Zero);
drawToScreen.Add(terrain);
drawToScreen.Add(skydome);
//add statistics to screen
drawToScreen.Add(statisticsOverlay);
//add console to screen
drawToScreen.Add(console.getTextElementRect());
//add actor to the screen
drawToScreen.Add(actor);
}
protected override void Initialise()
{
Resource.EnableResourceTracking();
//create the draw target.
drawToScreen = new DrawTargetScreen(this, new Camera2D());
drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//create the GameStateManager
GameStateManager manager = new GameStateManager(this);
//add it to the screen, and to be updated
this.drawToScreen.Add(manager);
this.UpdateManager.Add(manager);
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
this.drawToScreen.Add(stats);
}
protected override void Initialise()
{
Resource.EnableResourceTracking();
//draw targets usually need a camera.
Xen.Ex.Camera.FirstPersonControlledCamera3D camera = new Xen.Ex.Camera.FirstPersonControlledCamera3D(this.UpdateManager);
//don't allow the camera to move
camera.MovementSensitivity *= 0;
camera.Position = new Vector3(0, 5, 0);
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
drawToScreen.ClearBuffer.ClearColour = new Color(64, 64, 64);
//create the particle system
this.particles = new ParticleSystem(this.UpdateManager);
//the snow particles will be drawn as velocity particles
this.snowDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.particles, false, 0.1f);
//the fog particles will be drawn as normal billboards
this.fogDrawer = new Xen.Ex.Graphics.Display.BillboardParticles3D(this.particles);
//add a ground plane to show the horizon
drawToScreen.Add(new DarkGroundPlane(new Vector4(0.225f, 0.225f, 0.225f, 1f)));
//add the particles
drawToScreen.Add(fogDrawer);
drawToScreen.Add(snowDrawer);
//Note: The particle drawers are masked in the LoadContent method
//add draw stats
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(stats);
}
protected override void Initialise()
{
Resource.EnableResourceTracking();
Camera3D camera = new Xen.Ex.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero, true);
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//NEW CODE
//create a BatchModel, this class stores the ModelData and will draw BatchModelInstances
this.batchModel = new BatchModel();
//NEW CODE
//create a large number of actors (1600)
for (float x = -20; x < 20; x++)
{
for (float y = -20; y < 20; y++)
{
drawToScreen.Add(new Actor(this.batchModel, new Vector3(x * 5, y * 5, -5)));
}
}
//this is the most important bit...
//always add the BatchModel itself to the draw target,
//this should be added *after* all BatchModelInstances have been added
//Note: each time a BatchModelInstance is drawn, it will store it's world matrix in the BatchModel
//If the BatchModel is not drawn, the buffer storing these matrices will not be emptied, and will
//eventually throw an OutOfMemoryException exception.
this.drawToScreen.Add(batchModel);
statistics = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
this.drawToScreen.Add(statistics);
}
protected override void Initialise()
{
Camera3D camera = new Camera3D();
camera.LookAt(Vector3.Zero, new Vector3(0, 0, 5), Vector3.UnitY);
//create the draw target.
drawToScreen = new DrawTargetScreen(camera);
drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//create a shader to display the geometry (this is the same as tutorial 02)
var lightDirection = new Vector3(1.0f, 0.5f, 0.5f);
var material = new MaterialShader();
material.SpecularColour = Color.LightYellow.ToVector3(); //give the material a nice sheen
var lights = new MaterialLightCollection();
lights.AmbientLightColour = Color.CornflowerBlue.ToVector3() * 0.5f; //set the ambient
lights.CreateDirectionalLight(lightDirection, Color.Gray); //add the first of two light sources
lights.CreateDirectionalLight(-lightDirection, Color.DarkSlateBlue);
material.LightCollection = lights;
//create a simpler shader to display the wireframe (and also used for the bounding cube)
var simpleShader = new Xen.Ex.Shaders.FillSolidColour();
simpleShader.FillColour = Vector4.One * 0.01f;
var sphereSize = new Vector3(0.5f, 0.5f, 0.5f);
//create the complex sphere, this will have ~100k triangles.
//pass in a shader for wireframe rendering
sphere = new GeometryDrawer(new Xen.Ex.Geometry.Sphere(sphereSize, 200), material, simpleShader);
//create the bounding cube
sphereBoundingBox = new GeometryDrawer(new Xen.Ex.Geometry.Cube(sphereSize), simpleShader, null);
//create the occluding cube, and position it close to the camera
cube = new GeometryDrawer(new Xen.Ex.Geometry.Cube(Vector3.One), material, null);
cube.position = new Vector3(0, 0, 2.75f);
//add the cube first (so it can draw first, potentially occluding the sphere)
//if the cube was added second, it would have no effect, as it would draw after the sphere
drawToScreen.Add(cube);
//create the predicate, passing in the sphere and bounding box
var predicate = new Xen.Ex.Scene.DrawPredicate(sphere, sphereBoundingBox);
//add the DrawPredicate (the DrawPredicate draws it's children)
drawToScreen.Add(predicate);
//statistic overlay
statOverlay = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(statOverlay);
}
protected override void Initialise()
{
camera = new Camera3D();
camera.Projection.FarClip = 300;
camera.Projection.NearClip = 10;
camera.Projection.FieldOfView *= 0.55f;
//create the draw target.
drawToScreen = new DrawTargetScreen(camera);
//no need to clear the colour buffer, as a special background will be drawn
drawToScreen.ClearBuffer.ClearColourEnabled = false;
//create the light collection first
lights = new MaterialLightCollection();
// In this example, the rendering order has been manually optimized to reduce the number of pixels drawn
//
// In xen, rendering is usually explicit. This means, when a call to Draw() is made, the draw order is
// respected, and internally the object will be drawn using the graphics API.
// Objects added to the screen will have Draw() called in the order they were added.
//
// However, the draw order can also cause performance problems.
// In general, it's best to draw front to back, this means draw the objects closest to the screen first.
//
// This way, the objects at the back will be drawing behind the objects already drawn.
// Modern video cards can quickly discard pixels if they are 'behind' what is already drawn.
// Without front-to-back, the objects at the front could be drawing *over* objects already drawn.
//
// This is known as overdraw, a case where an object is drawn, only to be 'overdrawn' later in the frame.
// Reducing overdraw can help performance, especially when complex shaders are used.
//
// In this example, the sample is usually vertex-limited (that is, the bottleneck is vertex processing)
// However, it can demonstrate how optimizing for overdraw can significantly reduce the number of pixels
// that are shaded.
//
// In debug builds, the DrawStatisticsDisplay class will show the number of pixels drawn in the frame.
//
// With overdraw optimized draw order, ~1,000,000 pixels are drawn per frame. Without, upto 2,100,000
// pixels are drawn per frame (usually ~1,800,000). (A 1280x720 display has 921,600 pixels)
//
// This means that without an overdraw optimized draw order, on average, each pixel is being drawn
// twice. With an optimized draw order, this number is closer to 1.1, which is very close to the
// optimal value of 1.0 (where each pixel is only drawn once).
//
// Note that the number of pixels reported by the DrawStatisticsDisplay is for the entire frame, including
// every render target. Some PCs may not support this value, and display -1.
//
// One last point....
// This sample is an extreme test of a GPU's ability to push triangles onto the screen (vertex/triangle rate).
// However, observation will show the number of triangles drawn is often over 3,300,000!
// Assuming half the triangles are back-face culled (an accurate approximation), this still means
// there are around 1,650,000 triangles that are visible at any time.
// (But remember, the vertex shader still runs for back facing triangles!)
//
// Assuming approximatly half of these triangles are depth occluded (very approximate), still
// results in a huge number of visible triangles.
// This all means that the average triangle is drawing a *very* small number of pixels, in this case,
// the average for the actors is probably *less than 1 pixel per triangle!*.
//
// Triangles averaging less than 1 pixel are known as subpixel triangles.
// For a number of reasons, subpixel triangles are very inefficent.
// For example, if a single pixel is drawn, due to the way a video card works, the pixel shader will always
// run in multiples of 4 pixels, so a single pixel triangle will still run the pixel shader 4 times.
//
// As an approximate rule:
// Typically drawing a 1 pixel triangle will be as no faster than drawing a 16 pixel triangle.
//
// This makes this sample a perfect candidate for level of detail optimization, where a lower resolution
// model is used as an actor gets further away from the screen. (Eg, two modelInstances, sharing a controller)
//
// The vertex shader is also very expensive, and for each triangle, it will be run upto 3 times.
// This means the vertex shader is running more often than the pixel shader!
// This hypothesis can be confirmed; setting the lights to per-vertex, instead of per-pixel, results
// in a significantly *lower* frame rate!
//
//
//
bool optimizeForOverdraw = true;
//create a list of actors to added to the screen
var actors = new List<Actor>(500);
//create 500 actors!
for (int i = 0; i < 500; i++)
{
Actor actor = new Actor(this.Content, this.UpdateManager, lights, diskRadius);
actors.Add(actor);
}
//create the lights, similar to Tutorial 14
lights.AmbientLightColour = new Vector3(0.35f, 0.35f, 0.45f);
Vector3[] lightPositions =
{
new Vector3(0, 30, 12),
new Vector3(0, -30, 12)
};
//setup the two lights in the scene
IDraw lightGeometry = null;
IDraw lightPoleGeometry = null;
//create geometry to display the lights
var lightSourceGeometry = new List<IDraw>();
//setup the lights, and create the light globe geometry
for (int i = 0; i < lightPositions.Length; i++)
{
var colour = new Vector3(2, 2, 2);
var light = lights.CreatePointLight(lightPositions[i], 1, colour, colour);
light.SourceRadius = 6;
if (lightGeometry == null)
{
lightGeometry = new Xen.Ex.Geometry.Sphere(Vector3.One, 8, true, false, false);
lightPoleGeometry = new Xen.Ex.Geometry.Cube(new Vector3(0.4f, 0.4f, lightPositions[i].Z * 0.5f));
}
//visually show the light
//create the light sphere geometry from tutorial 14.
var position = lightPositions[i];
lightSourceGeometry.Add(new Tutorial_14.LightSourceDrawer(position, lightGeometry, Color.LightYellow));
position.Z *= 0.5f;
lightSourceGeometry.Add(new Tutorial_14.LightSourceDrawer(position, lightPoleGeometry, new Color(40,40,70)));
}
//create the ground plane, also from tutorial 14
var ground = new Tutorial_14.GroundDisk(this.Content, lights, diskRadius);
//this is a special background element,
//it draws a gradient over the entire screen, fading from dark at the bottom to light at the top.
Color darkBlue = new Color(40, 40, 50);
Color lightBlue = new Color(100, 100, 110);
var background = new BackgroundGradient(lightBlue, darkBlue);
if (optimizeForOverdraw == false)
{
//add all the objects in a naive order
//first add the background (fills the entire screen, draws to every pixel, but is very fast)
drawToScreen.Add(background);
//then add the ground plane (all the actors will appear on top of the ground plane, overdrawing it)
drawToScreen.Add(ground);
//then add the lights (which are on top of the ground, overdrawing it)
foreach (IDraw geometry in lightSourceGeometry)
drawToScreen.Add(geometry);
//then finally add the actors, in the order they were created
foreach (Actor actor in actors)
drawToScreen.Add(actor);
}
else
{
//or, add the objects in a order optimized for overdraw
#if !XBOX360
//first, add the actors. Because they are almost always closest to the screen
//however, use a depth sorter so the actors are sorted into a front to back draw order,
//this sorting is based on the centre point of the cull tests they perform.
var sorter = new Xen.Ex.Scene.DepthDrawSorter(Xen.Ex.Scene.DepthSortMode.FrontToBack);
//Remember, the objects placed in the sorter *must* perform a valid CullTest,
//if the CullTest simply returns true/false, no sorting will occur.
//(Note the Actor.CullTest method)
//to ease the CPU load, have the sorter only sort the actors every few frames...
sorter.SortDelayFrameCount = 5;
foreach (Actor actor in actors)
sorter.Add(actor); // add the actors to the sorter (not the screen)
//the sorter itself must be added to the screen!
drawToScreen.Add(sorter); // the sorter will then draw the actors in a sorted order
#else
//In this case (on the Xbox), because the application is heavily vertex limited
//and already heavily CPU stretched by the animation system, the cost of
//sorting the actors actually causes a larger performance hit on the CPU than
//the time saved on the GPU. This inballance causes a frame rate drop.
//
//However, the reason for this may be unexpected.
//The framerate drop is not caused by the overhead of sorting the actors.
//
//Any 3D API calls made are doubly expensive on the XBOX, so in order to
//maintain 20fps in this sample, the primary (rendering) thread must not
//block, or switch to task processing.
//If it does so, valuable rendering time is lost.
//
//When using a sorter, the actors are drawn in an order that is constantly changing.
//However, they always have Update() called in a consistent order.
//
//During Update() the actors animation controllers will spawn thread tasks to
//process their animation.
//
//These tasks are processed on the spare xbox hardware threads, they are
//processed in the order they were added.
//Processing the animation usually completes before the rendering finishes.
//(the rendering is not delayed waiting for the animation to finish).
//
//However, when sorting the actors get drawn in an unpredictable order,
//this means the last actor added could be the first actor to draw,
//in such a case, the chances of it's animation processing having completed
//is *very* low. When this happens, the rendering thread has to switch to
//processing animations, delaying rendering.
//
//So, for the xbox, in this sample it's best just to draw in the update order.
foreach (Actor actor in actors)
drawToScreen.Add(actor);
#endif
//add the light source geometry, as they are usually below the actors, but above the ground
foreach (IDraw geometry in lightSourceGeometry)
drawToScreen.Add(geometry);
//then add the ground plane, which is usually below the actors and lights.
drawToScreen.Add(ground);
//finally, enable a special feature of ElementRect.
//This makes the element draw at the maximum possible Z distance
//(behind anything else that has been drawn)
background.DrawAtMaxZDepth = true;
//add it to the screen
drawToScreen.Add(background);
}
//finally,
//create the draw statistics display
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(stats);
}
protected override void Initialise()
{
Resource.EnableResourceTracking();
camera = new Camera3D();
camera.Projection.FarClip = 300;
camera.Projection.NearClip = 10;
camera.Projection.FieldOfView *= 0.55f;
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
//no need to clear the colour buffer, as a special background will be drawn
drawToScreen.ClearBuffer.ClearColourEnabled = false;
//create the light collection first
lights = new MaterialLightCollection();
// In this example, the rendering order has been manually optimized to reduce the number of pixels drawn
//
// In xen, rendering is usually explicit. This means, when a call to Draw() is made, the draw order is
// respected, and internally the object will be drawn using the graphics API.
// Objects added to the screen will have Draw() called in the order they were added.
//
// However, the draw order can also cause performance problems.
// In general, it's best to draw front to back, this means draw the objects closest to the screen first.
//
// This way, the objects at the back will be drawing behind the objects already drawn.
// Modern video cards can quickly discard pixels if they are 'behind' what is already drawn.
// Without front-to-back, the objects at the front could be drawing *over* objects already drawn.
//
// This is known as overdraw, a case where an object is drawn, only to be 'overdrawn' later in the frame.
// Reducing overdraw can help performance, especially when complex shaders are used.
//
// In this example, the sample is usually vertex-limited (that is, the bottleneck is vertex processing)
// However, it can demonstrate how optimizing for overdraw can significantly reduce the number of pixels
// that are shaded.
//
// In debug builds, the DrawStatisticsDisplay class will show the number of pixels drawn in the frame.
//
// With overdraw optimized draw order, ~1,000,000 pixels are drawn per frame. Without, upto 2,100,000
// pixels are drawn per frame (usually ~1,800,000). (A 1280x720 display has 921,600 pixels)
//
// This means that without an overdraw optimized draw order, on average, each pixel is being drawn
// twice. With an optimized draw order, this number is closer to 1.1, which is very close to the
// optimal value of 1.0 (where each pixel is only drawn once).
//
// Note that the number of pixels reported by the DrawStatisticsDisplay is for the entire frame, including
// every render target. Some PCs may not support this value, and display -1.
//
// One last point....
// This sample is an extreme test of a GPU's ability to push triangles onto the screen (vertex/triangle rate).
// However, observation will show the number of triangles drawn is often over 3,300,000!
// Assuming half the triangles are back-face culled (an accurate approximation), this still means
// there are around 1,650,000 triangles that are visible at any time.
// (But remember, the vertex shader still runs for back facing triangles!)
//
// Assuming approximatly half of these triangles are depth occluded (very approximate), still
// results in a huge number of visible triangles.
// This all means that the average triangle is drawing a *very* small number of pixels, in this case,
// the average for the actors is probably *less than 1 pixel per triangle!*.
//
// Triangles averaging less than 1 pixel are known as subpixel triangles.
// For a number of reasons, subpixel triangles are very inefficent.
// For example, if a single pixel is drawn, due to the way a video card works, the pixel shader will always
// run in multiples of 4 pixels, so a single pixel triangle will still run the pixel shader 4 times.
//
// This makes this sample a perfect candidate for level of detail optimization, where a lower resolution
// model is used as an actor gets further away from the screen.
//
// The vertex shader is also very expensive, and for each triangle, it will be run upto 3 times.
// This means the vertex shader is quite possibly running more often than the pixel shader.
// This hypothesis can be confirmed; setting the lights to per-vertex, instead of per-pixel, results
// in a significantly *lower* frame rate!
//
//
//
bool optimizeForOverdraw = true;
//create a list of actors to added to the screen
List <Actor> actors = new List <Actor>(500);
//create 500 actors!
for (int i = 0; i < 500; i++)
{
Actor actor = new Actor(this.Content, this.UpdateManager, lights, diskRadius);
actors.Add(actor);
}
//create the lights, similar to Tutorial 14
lights.AmbientLightColour = new Vector3(0.45f, 0.45f, 0.5f);
Vector3[] lightPositions = new Vector3[]
{
new Vector3(0, 30, 12),
new Vector3(0, -30, 12)
};
//setup the two lights in the scene
IDraw lightGeometry = null;
IDraw lightPoleGeometry = null;
//create geometry to display the lights
List <IDraw> lightSourceGeometry = new List <IDraw>();
//setup the lights, and create the light globe geometry
for (int i = 0; i < lightPositions.Length; i++)
{
Vector3 colour = new Vector3(5, 5, 5);
IMaterialPointLight light = lights.AddPointLight(i < 2, lightPositions[i], 8, colour, colour);
light.ConstantAttenuation = 0.25f; // make the ligh falloff curve a lot sharper (brighter at the centre)
light.LinearAttenuation = 0;
light.QuadraticAttenuation = 0.075f; //approximate inverse distance in which the brightness of the light will halve
if (lightGeometry == null)
{
lightGeometry = new Xen.Ex.Geometry.Sphere(Vector3.One, 8, true, false, false);
lightPoleGeometry = new Xen.Ex.Geometry.Cube(new Vector3(0.4f, 0.4f, lightPositions[i].Z * 0.5f));
}
//visually show the light
//create the light sphere geometry from tutorial 14.
Vector3 position = lightPositions[i];
lightSourceGeometry.Add(new Tutorial_14.LightSourceDrawer(position, lightGeometry, Color.LightYellow));
position.Z *= 0.5f;
lightSourceGeometry.Add(new Tutorial_14.LightSourceDrawer(position, lightPoleGeometry, new Color(40, 40, 70)));
}
//create the ground plane, also from tutorial 14
Tutorial_14.GroundDisk ground = new Tutorial_14.GroundDisk(this.Content, lights, diskRadius);
//this is a special background element,
//it draws a gradient over the entire screen, fading from dark at the bottom to light at the top.
Color darkBlue = new Color(40, 40, 50);
Color lightBlue = new Color(100, 100, 110);
BackgroundGradient background = new BackgroundGradient(lightBlue, darkBlue);
if (optimizeForOverdraw == false)
{
//add all the objects in a naive order
//first add the background (fills the entire screen, draws to every pixel, but is very fast)
drawToScreen.Add(background);
//then add the ground plane (all the actors will appear on top of the ground plane, overdrawing it)
drawToScreen.Add(ground);
//then add the lights (which are on top of the ground, overdrawing it)
foreach (IDraw geometry in lightSourceGeometry)
{
drawToScreen.Add(geometry);
}
//then finally add the actors, in the order they were created
foreach (Actor actor in actors)
{
drawToScreen.Add(actor);
}
}
else
{
//or, add the objects in a order optimized for overdraw
#if !XBOX360
//first, add the actors. Because they are almost always closest to the screen
//however, use a depth sorter so the actors are sorted into a front to back draw order,
//this sorting is based on the centre point of the cull tests they perform.
Xen.Ex.Scene.DepthDrawSorter sorter = new Xen.Ex.Scene.DepthDrawSorter(Xen.Ex.Scene.DepthSortMode.FrontToBack);
//Remember, the objects placed in the sorter *must* perform a valid CullTest,
//if the CullTest simply returns true/false, no sorting will occur.
//(Note the Actor.CullTest method)
//to ease the CPU load, have the sorter only sort the actors every few frames...
sorter.SortDelayFrameCount = 5;
foreach (Actor actor in actors)
{
sorter.Add(actor); // add the actors to the sorter (not the screen)
}
//the sorter itself must be added to the screen!
drawToScreen.Add(sorter); // the sorter will then draw the actors in a sorted order
#else
//In this case (on the Xbox), because the application is heavily vertex limited
//and already heavily CPU stretched by the animation system, the cost of
//sorting the actors actually causes a larger performance hit on the CPU than
//the time saved on the GPU. This inballance causes a frame rate drop.
//
//However, the reason for this may be unexpected.
//The framerate drop is not caused by the overhead of sorting the actors.
//
//Any 3D API calls made are doubly expensive on the XBOX, so in order to
//maintain 20fps in this sample, the primary (rendering) thread must not
//block, or switch to task processing.
//If it does so, valuable rendering time is lost.
//
//When using a sorter, the actors are drawn in an order that is constantly changing.
//However, they always have Update() called in a consistent order.
//
//During Update() the actors animation controllers will spawn thread tasks to
//process their animation.
//
//These tasks are processed on the three spare xbox hardware threads, they are
//processed in the order they were added.
//Processing the animation usually completes before the rendering finishes.
//(the rendering is not delayed waiting for the animation to finish).
//
//However, when sorting the actors get drawn in an unpredictable order,
//this means the last actor added could be the first actor to draw,
//in such a case, the chances of it's animation processing having completed
//is *very* low. When this happens, the rendering thread has to switch to
//processing animations, delaying rendering.
//
//So, for the xbox, it's best just to draw in the update order.
foreach (Actor actor in actors)
{
drawToScreen.Add(actor);
}
#endif
//add the light source geometry, as they are usually below the actors, but above the ground
foreach (IDraw geometry in lightSourceGeometry)
{
drawToScreen.Add(geometry);
}
//then add the ground plane, which is usually below the actors and lights.
drawToScreen.Add(ground);
//finally, enable a special feature of ElementRect.
//This makes the element draw at the maximum possible Z distance
//(behind anything else that has been drawn)
background.DrawAtMaxZDepth = true;
//add it to the screen
drawToScreen.Add(background);
}
//finally,
//create the draw statistics display
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(stats);
}
protected override void Initialise()
{
//create the draw target.
drawToScreen = new DrawTargetScreen(new Camera2D());
drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//create the GameStateManager
GameStateManager manager = new GameStateManager(this);
//add it to the screen, and to be updated
this.drawToScreen.Add(manager);
this.UpdateManager.Add(manager);
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
this.drawToScreen.Add(stats);
}
protected override void Initialise()
{
//draw targets usually need a camera.
var camera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero, false);
//don't allow the camera to move too fast
camera.MovementSensitivity *= 0.1f;
camera.LookAt(new Vector3(0,3,0), new Vector3(1, 5, 10), new Vector3(0, 1, 0));
//create the draw target.
drawToScreen = new DrawTargetScreen(camera);
drawToScreen.ClearBuffer.ClearColour = new Color(45,50,60);
//create the fire and smoke particle system
this.fireParticleSystem = new ParticleSystem(this.UpdateManager);
this.smokeParticleSystem = new ParticleSystem(this.UpdateManager);
//IMPORTANT
//The following flags are FALSE by default.
//For looping effects, such as the fire and smoke, it's highly
//recommended to enable this flag. Otherwise, while the effect
//is offscreen, the particle system will continue to process.
this.fireParticleSystem.PauseUpdatingWhileCulled = true;
this.smokeParticleSystem.PauseUpdatingWhileCulled = true;
this.drawSorted = new Xen.Ex.Scene.DepthDrawSorter(Xen.Ex.Scene.DepthSortMode.BackToFront);
this.drawUnsorted = new DrawList();
var fireDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.fireParticleSystem, true);
var smokeDrawer = new Xen.Ex.Graphics.Display.BillboardParticles3D(this.smokeParticleSystem);
for (int i = 0; i < 10; i++)
{
Vector3 position = new Vector3((float)Math.Cos(i * Math.PI / 5.0) * 6.0f, 0, (float)Math.Sin(i * Math.PI / 5.0) * 6.0f);
CullableParticleWrapper fireEffect, smokeEffect;
fireEffect = new CullableParticleWrapper(fireDrawer, position, new Vector3(0, 2, 0), 4);
smokeEffect = new CullableParticleWrapper(smokeDrawer, position, new Vector3(0, 6, 0), 5);
this.drawSorted.Add(fireEffect);
this.drawSorted.Add(smokeEffect);
this.drawUnsorted.Add(fireEffect);
this.drawUnsorted.Add(smokeEffect);
var light = new GroundLightDisk(position);
this.drawSorted.Add(light);
this.drawUnsorted.Add(light);
}
//setup the burst effect
this.burstParticleSystem = new ParticleSystem(this.UpdateManager);
//for this case, PauseUpdatingWhileCulled is not set to true.
//The particle emitting is culled when offscreen. If set to true,
//Any particles left offscreen could 'pause', when they naturally
//wouldn't be emitted anyway.
//(The particle system will use very few resources when it has no
//active particles)
this.burstSources = new BurstSource[20];
Random rand = new Random();
for (int i = 0; i < this.burstSources.Length; i++)
{
//create the bursts out in the distance
Vector3 position = new Vector3((float)i * 5.0f - this.burstSources.Length * 2.5f, 0, -20);
float radius = 10; // with a decent radius
//give them a random starting time
this.burstSources[i] = new BurstSource(position, radius, (float)rand.NextDouble() * 2);
this.drawSorted.Add(this.burstSources[i]);
this.drawUnsorted.Add(this.burstSources[i]);
}
//the bursts need to be drawn as a group..
var burstDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.burstParticleSystem,false,0.5f);
this.drawSorted.Add(burstDrawer);
this.drawUnsorted.Add(burstDrawer);
//Use all the burst sources to cull the drawer (may not be ideal if there were many sources...)
//Use the particle drawer CullProxy to do it
burstDrawer.CullProxy = new BurstCullProxy(this.burstSources);
//add a ground plane to show the horizon
drawToScreen.Add(new Tutorial_22.DarkGroundPlane(new Vector4(0.125f,0.15f,0.135f,1)));
//add the sorted and unsorted lists
drawToScreen.Add(drawSorted);
drawToScreen.Add(drawUnsorted);
//finally, create a CullTestVisualizer, which will visually show the cull tests performed
cullTestVisualizer = new Xen.Ex.Scene.CullTestVisualizer();
//the visualizer is added as a draw modifier
this.drawToScreen.AddModifier(cullTestVisualizer);
//add help text
this.text = new TextElement();
this.text.VerticalAlignment = VerticalAlignment.Bottom;
this.text.Position = new Vector2(50, 100);
drawToScreen.Add(this.text);
//add draw stats
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(stats);
}
protected override void Initialise()
{
Resource.EnableResourceTracking();
//draw targets usually need a camera.
Xen.Ex.Camera.FirstPersonControlledCamera3D camera = new Xen.Ex.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero, false);
//don't allow the camera to move too fast
camera.MovementSensitivity *= 0.1f;
camera.LookAt(new Vector3(0, 3, 0), new Vector3(1, 5, 10), new Vector3(0, 1, 0));
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
drawToScreen.ClearBuffer.ClearColour = new Color(45, 50, 60);
//create the fire and smoke particle system
this.fireParticleSystem = new ParticleSystem(this.UpdateManager);
this.smokeParticleSystem = new ParticleSystem(this.UpdateManager);
//IMPORTANT
//The following flags are FALSE by default.
//For looping effects, such as the fire and smoke, it's highly
//recommended to enable this flag. Otherwise, while the effect
//is offscreen, the particle system will continue to process.
this.fireParticleSystem.PauseUpdatingWhileCulled = true;
this.smokeParticleSystem.PauseUpdatingWhileCulled = true;
this.drawSorted = new Xen.Ex.Scene.DepthDrawSorter(Xen.Ex.Scene.DepthSortMode.BackToFront);
this.drawUnsorted = new DrawList();
Xen.Ex.Graphics.Display.ParticleDrawer3D fireDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.fireParticleSystem, true);
Xen.Ex.Graphics.Display.ParticleDrawer3D smokeDrawer = new Xen.Ex.Graphics.Display.BillboardParticles3D(this.smokeParticleSystem);
for (int i = 0; i < 10; i++)
{
Vector3 position = new Vector3((float)Math.Cos(i * Math.PI / 5.0) * 6.0f, 0, (float)Math.Sin(i * Math.PI / 5.0) * 6.0f);
CullableParticleWrapper fireEffect, smokeEffect;
fireEffect = new CullableParticleWrapper(fireDrawer, position, new Vector3(0, 2, 0), 4);
smokeEffect = new CullableParticleWrapper(smokeDrawer, position, new Vector3(0, 6, 0), 5);
this.drawSorted.Add(fireEffect);
this.drawSorted.Add(smokeEffect);
this.drawUnsorted.Add(fireEffect);
this.drawUnsorted.Add(smokeEffect);
GroundLightDisk light = new GroundLightDisk(position);
this.drawSorted.Add(light);
this.drawUnsorted.Add(light);
}
//setup the burst effect
this.burstParticleSystem = new ParticleSystem(this.UpdateManager);
//for this case, PauseUpdatingWhileCulled is not set to true.
//The particle emitting is culled when offscreen. If set to true,
//Any particles left offscreen could 'pause', when they naturally
//wouldn't be emitted anyway.
//(The particle system will use very few resources when it has no
//active particles)
this.burstSources = new BurstSource[20];
Random rand = new Random();
for (int i = 0; i < this.burstSources.Length; i++)
{
//create the bursts out in the distance
Vector3 position = new Vector3((float)i * 5.0f - this.burstSources.Length * 2.5f, 0, -20);
float radius = 10; // with a decent radius
//give them a random starting time
this.burstSources[i] = new BurstSource(position, radius, (float)rand.NextDouble() * 2);
this.drawSorted.Add(this.burstSources[i]);
this.drawUnsorted.Add(this.burstSources[i]);
}
//the bursts need to be drawn as a group..
ParticleDrawer3D burstDrawer = new Xen.Ex.Graphics.Display.VelocityBillboardParticles3D(this.burstParticleSystem, false, 0.5f);
this.drawSorted.Add(burstDrawer);
this.drawUnsorted.Add(burstDrawer);
//Use all the burst sources to cull the drawer (may not be ideal if there were many sources...)
//Use the particle drawer CullProxy to do it
burstDrawer.CullProxy = new BurstCullProxy(this.burstSources);
//add a ground plane to show the horizon
drawToScreen.Add(new Tutorial_22.DarkGroundPlane(new Vector4(0.125f, 0.15f, 0.135f, 1)));
//add the sorted and unsorted lists
drawToScreen.Add(drawSorted);
drawToScreen.Add(drawUnsorted);
//finally, create a CullTestVisualizer, which will visually show the cull tests performed
cullTestVisualizer = new Xen.Ex.Scene.CullTestVisualizer(this.drawToScreen.Camera);
//the visualizer is added as a draw modifier
this.drawToScreen.AddModifier(cullTestVisualizer);
//add help text
this.text = new TextElement();
this.text.VerticalAlignment = VerticalAlignment.Bottom;
this.text.Position = new Vector2(50, 100);
drawToScreen.Add(this.text);
//add draw stats
stats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(stats);
}
protected override void Initialise()
{
//setup the view camera first
//--------------------------------------
viewCamera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager);
viewCamera.Projection.FieldOfView *= 0.65f;
viewCamera.MovementSensitivity *= 0.05f;
viewCamera.LookAt(new Vector3(-3, 4, 2), new Vector3(6, 6, 2), new Vector3(0, 1, 0));
viewCamera.Projection.NearClip = 0.1f;
//shadow map setup:
//--------------------------------------
const float shadowArea = 4;
const int shadowMapResolution = 1024;
//setup the shadow map rendering camera
shadowCamera = new Camera3D();
//setup the shadow map projection to roughly cover the character
shadowCamera.Projection.Orthographic = true;
shadowCamera.Projection.NearClip = shadowArea * 2;
shadowCamera.Projection.FarClip = -shadowArea * 2;
shadowCamera.Projection.Region = new Vector4(1, -1.8f, -1, 0.2f) * shadowArea;
//setup the shadow map draw target
//create the shadow map
shadowMap = new DrawTargetTexture2D(shadowCamera, shadowMapResolution, shadowMapResolution, SurfaceFormat.HalfSingle, DepthFormat.Depth24);
shadowMap.ClearBuffer.ClearColour = Color.White;
//setup the shadow map drawer..
shadowDrawer = new Tutorial_25.ShadowMapDrawer(null, new Tutorial_25.ShadowOutputShaderProvider());
this.shadowMap.Add(shadowDrawer);
//create the main draw targets.
//--------------------------------------
drawToScreen = new DrawTargetScreen(new Camera2D());
drawToScreen.ClearBuffer.ClearColourEnabled = false;
drawToRenderTarget = new DrawTargetTexture2D(viewCamera, this.WindowWidth, this.WindowHeight, SurfaceFormat.Color, DepthFormat.Depth24Stencil8, false, PreferredMultiSampleLevel.FourSamples, RenderTargetUsage.PlatformContents);
drawToRenderTarget.ClearBuffer.ClearColourEnabled = false;
//setup the bloom draw targets
//--------------------------------------
//scale to reduce the size of the bloom target, compared to main render target
const int bloomDownsample = 8; //eight times smaller
bloomRenderTarget = new DrawTargetTexture2D(new Camera2D(), Math.Max(1, drawToRenderTarget.Width / bloomDownsample), Math.Max(1, drawToRenderTarget.Height / bloomDownsample), SurfaceFormat.Color, DepthFormat.None);
bloomRenderTarget.ClearBuffer.ClearColourEnabled = false;
bloomIntermediateRenderTarget = null;
//the bloom intermediate target is not needed on the xbox, as the full bloom target fits in EDRAM
bloomIntermediateRenderTarget = new DrawTargetTexture2D(viewCamera, bloomRenderTarget.Width, bloomRenderTarget.Height, SurfaceFormat.Color, DepthFormat.None);
bloomIntermediateRenderTarget.ClearBuffer.ClearColourEnabled = false;
//setup the blur filter, with a large 31 sample radius.
bloomBlurPass = new Xen.Ex.Filters.BlurFilter(Xen.Ex.Filters.BlurFilterFormat.ThirtyOneSampleBlur_FilteredTextureFormat, 1.0f, bloomRenderTarget, bloomIntermediateRenderTarget);
//setup the character model
this.model = new ModelInstance(); //(the model is setup in LoadContent)
this.modelRotation = new DrawRotated(model);
this.modelRotation.RotationAngle = 3;
//add the model to be drawn
drawToRenderTarget.Add(modelRotation);
//setup the shaders
this.characterRenderShader = new Shaders.Character();
//setup the output and bloom shaders
outputShader = new Shaders.RgbmDecode();
drawToScreen.Add(new ShaderElement(outputShader, new Vector2(1, 1), true));
bloomPassShader = new Shaders.RgbmDecodeBloomPass();
bloomRenderTarget.Add(new ShaderElement(bloomPassShader, new Vector2(1, 1), true));
//add a background to be drawn
drawToRenderTarget.Add(new BackgroundDrawer());
//setup the debug image displays
//--------------------------------------
this.rgmbTextureAlphaShader = new Shaders.AlphaWrite();
this.bloomTextureDisplay = new TexturedElement(this.bloomRenderTarget, new Vector2(0.2f, 0.2f), true);
this.rgbmTextureDisplay = new TexturedElement(this.drawToRenderTarget, new Vector2(0.2f, 0.2f), true);
this.rgbmTextureAlphaDisplay = new ShaderElement(this.rgmbTextureAlphaShader, new Vector2(0.2f, 0.2f), true);
this.rgbmTextureAlphaDisplay.Position = new Vector2(0.7f, 0.2f);
this.rgbmTextureDisplay.Position = new Vector2(0.7f, 0.4f);
this.bloomTextureDisplay.Position = new Vector2(0.7f, 0.6f);
this.drawToScreen.Add(this.rgbmTextureDisplay);
this.drawToScreen.Add(this.rgbmTextureAlphaDisplay);
this.drawToScreen.Add(this.bloomTextureDisplay);
//setup the render config
this.configEditor = new RenderConfigEditor(this.Content);
this.drawToScreen.Add(configEditor);
this.UpdateManager.Add(configEditor);
//add a statistics overlay.
drawStats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(drawStats);
}
protected override void Initialise()
{
//DrawStatisticsDisplay requires that resource tracking is enabled
Resource.EnableResourceTracking();
//Xen.Ex provides a very useful Camera3D called 'FirstPersonControlledCamera3D'.
//This camera uses player input to act as a simple first-person style flythrough camera
Xen.Ex.Camera.FirstPersonControlledCamera3D camera = null;
//it uses player input, so the UpdateManager must be passed in
camera = new Xen.Ex.Camera.FirstPersonControlledCamera3D(this.UpdateManager);
//in this case, we want the z-axis to be the up/down axis (otherwise it's the Y-axis)
camera.ZAxisUp = true;
//also it's default is a bit too fast moving
camera.MovementSensitivity *= 0.1f;
camera.LookAt(new Vector3(1, 0, 0), new Vector3(), new Vector3(0, 0, 1));
this.camera = camera;
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
//create a large number of actor instance from tutorial 10..
for (int n = 0; n <= 16; n++)
{
//create in a half circle
float angle = (n / 16.0f) * MathHelper.Pi;
Vector3 position = new Vector3((float)Math.Sin(angle), (float)Math.Cos(angle), 0);
//not too close together
position *= 10;
drawToScreen.Add(new Tutorial_10.Actor(this.Content, position));
}
//this element will display the camera position
positionDisplay = new TextElement();
//TextElement (unlike other Elements) defaults to Top Left alignment
//So, in order to bring it closer to the centre of the screen (due to potential overscan)
//it's position needs to be set 'right' and 'down' from 'top left'
//(this is just an example, see XNA docs for correct overscan compensation behaviour)
positionDisplay.Position = new Vector2(40, -40); //offset from top left corner alignment
//add it to the screen
drawToScreen.Add(positionDisplay);
Vector2 sizeInPixels = new Vector2(400, 200);
//create the main block of yellow text
this.yellowElement = new TextElementRect(sizeInPixels);
this.yellowElement.Colour = Color.Yellow;
//first line of text... this will have a flashing 2D element embedded
string embeddedText = @"This is a text box with a large amount of custom text! It also includes an embedded 2D element: , which is a 16x16 SolidColourElement";
uint insertAtIndex = 96; // Hard coded to insert a 2D element at character index 96 which is about here: ^
//add a bunch of text...
this.yellowElement.Text.AppendLine(embeddedText);
this.yellowElement.Text.AppendLine();
this.yellowElement.Text.AppendLine(@"This class is:");
this.yellowElement.Text.AppendLine(this.GetType().FullName);
this.yellowElement.Text.AppendLine(@"It is located in assembly:");
this.yellowElement.Text.AppendLine(this.GetType().Assembly.FullName);
this.yellowElement.Text.AppendLine();
//add an embedded 2D element within the text
//create it..
this.embeddedElement = new SolidColourElement(Color.Red, new Vector2(16, 16)); // quite small
this.embeddedElement.AlphaBlendState = AlphaBlendState.Alpha;
//add it.
this.yellowElement.AddInline(this.embeddedElement, insertAtIndex);
#if XBOX360
this.yellowElement.Text.AppendLine(@"Press and hold both thumbsticks to show the debug overlay");
#else
this.yellowElement.Text.AppendLine(@"Press F12 to show the debug overlay");
#endif
//align the element rectangle to the bottom centre of the screen
this.yellowElement.VerticalAlignment = VerticalAlignment.Bottom;
this.yellowElement.HorizontalAlignment = HorizontalAlignment.Centre;
//centre align the text
this.yellowElement.TextHorizontalAlignment = TextHorizontalAlignment.Centre;
//centre the text in the middle of the 400x200 area of the element rectangle
this.yellowElement.TextVerticalAlignment = VerticalAlignment.Centre;
//add it to the screen
drawToScreen.Add(yellowElement);
//create the statistics display
//this class will query the DrawState for the previous frames DrawStatistics structure.
//this structure provides a large number of statistics for the drawn frame.
//The DrawStatisticsDisplay displays some of the more important statistics. It will also
//display thread activity on the xbox.
//DrawStatistics are only available in DEBUG xen builds
//They can be accessed at runtime with DrawState GetPreviousFrameStatistics()
//at runtime, pressing 'F12' will toggle the overlay (or holding both thumbsticks on x360)
this.statisticsOverlay = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
//As of xen 1.5, by default the DrawStatisticsDisplay displays a significantly reduced number of graphs.
//To display the full set of graphs (which generally takes up the entire screen), set the following
//property to 'true':
//this.statisticsOverlay.DisplayFullGraphList = true;
//then add it to the screen
drawToScreen.Add(statisticsOverlay);
}
protected override void Initialise()
{
Resource.EnableResourceTracking();
//setup the view camera first
//--------------------------------------
viewCamera = new Xen.Ex.Camera.FirstPersonControlledCamera3D(this.UpdateManager);
viewCamera.Projection.FieldOfView *= 0.65f;
viewCamera.MovementSensitivity *= 0.05f;
viewCamera.LookAt(new Vector3(-3, 4, 2), new Vector3(6, 6, 2), new Vector3(0, 1, 0));
viewCamera.Projection.NearClip = 0.1f;
//shadow map setup:
//--------------------------------------
const float shadowArea = 4;
const int shadowMapResolution = 1024;
//setup the shadow map rendering camera
shadowCamera = new Camera3D();
//setup the shadow map projection to roughly cover the character
shadowCamera.Projection.Orthographic = true;
shadowCamera.Projection.NearClip = shadowArea * 2;
shadowCamera.Projection.FarClip = -shadowArea * 2;
shadowCamera.Projection.Region = new Vector4(1, -1.8f, -1, 0.2f) * shadowArea;
//setup the shadow map draw target
//find a desirable format for the shadow map,
SurfaceFormat format = SurfaceFormat.Color;
//ideally use a high precision format, but only if it's supported. Avoid full 32bit float
if (DrawTargetTexture2D.SupportsFormat(SurfaceFormat.Rg32))
{
format = SurfaceFormat.Rg32; //ushort * 2
}
else if (DrawTargetTexture2D.SupportsFormat(SurfaceFormat.HalfVector2))
{
format = SurfaceFormat.HalfVector2; //fp16 * 2
}
else if (DrawTargetTexture2D.SupportsFormat(SurfaceFormat.HalfVector4))
{
format = SurfaceFormat.HalfVector4; //fp16 * 4
}
//create the shadow map
shadowMap = new DrawTargetTexture2D(shadowCamera, shadowMapResolution, shadowMapResolution, format, DepthFormat.Depth24);
shadowMap.ClearBuffer.ClearColour = Color.White;
//setup the shadow map drawer..
shadowDrawer = new Tutorial_25.ShadowMapDrawer(null, new Tutorial_25.ShadowOutputShaderProvider());
this.shadowMap.Add(shadowDrawer);
//create the main draw targets.
//--------------------------------------
drawToScreen = new DrawTargetScreen(this, new Camera2D());
drawToScreen.ClearBuffer.ClearColourEnabled = false;
drawToRenderTarget = new DrawTargetTexture2D(viewCamera, this.WindowWidth, this.WindowHeight, SurfaceFormat.Color, DepthFormat.Depth24Stencil8, false, MultiSampleType.FourSamples, RenderTargetUsage.PlatformContents);
drawToRenderTarget.ClearBuffer.ClearColourEnabled = false;
//setup the bloom draw targets
//--------------------------------------
//scale to reduce the size of the bloom target, compared to main render target
const int bloomDownsample = 8; //eight times smaller
bloomRenderTarget = new DrawTargetTexture2D(new Camera2D(), Math.Max(1, drawToRenderTarget.Width / bloomDownsample), Math.Max(1, drawToRenderTarget.Height / bloomDownsample), SurfaceFormat.Color);
bloomRenderTarget.ClearBuffer.ClearColourEnabled = false;
bloomIntermediateRenderTarget = null;
#if WINDOWS
//the bloom intermediate target is not needed on the xbox, as the full bloom target fits in EDRAM
bloomIntermediateRenderTarget = new DrawTargetTexture2D(viewCamera, bloomRenderTarget.Width, bloomRenderTarget.Height, SurfaceFormat.Color);
bloomIntermediateRenderTarget.ClearBuffer.ClearColourEnabled = false;
#endif
//setup the blur filter, with a large 31 sample radius.
bloomBlurPass = new Xen.Ex.Filters.BlurFilter(Xen.Ex.Filters.BlurFilterFormat.ThirtyOneSampleBlur_FilteredTextureFormat, 1.0f, bloomRenderTarget, bloomIntermediateRenderTarget);
//setup the character model
this.model = new ModelInstance(); //(the model is setup in LoadContent)
this.modelRotation = new DrawRotated(model);
this.modelRotation.RotationAngle = 3;
//add the model to be drawn
drawToRenderTarget.Add(modelRotation);
//setup the shaders
this.characterRenderShader = new Shaders.Character();
this.characterBlendRenderShader = new Shaders.CharacterBlend();
//setup the output and bloom shaders
outputShader = new Shaders.RgbmDecode();
drawToScreen.Add(new ShaderElement(outputShader, new Vector2(1, 1), true));
bloomPassShader = new Shaders.RgbmDecodeBloomPass();
bloomRenderTarget.Add(new ShaderElement(bloomPassShader, new Vector2(1, 1), true));
//add a background to be drawn
drawToRenderTarget.Add(new BackgroundDrawer());
//setup the debug image displays
//--------------------------------------
this.rgmbTextureAlphaShader = new Shaders.AlphaWrite();
this.bloomTextureDisplay = new TexturedElement(this.bloomRenderTarget, new Vector2(0.2f, 0.2f), true);
this.rgbmTextureDisplay = new TexturedElement(this.drawToRenderTarget, new Vector2(0.2f, 0.2f), true);
this.rgbmTextureAlphaDisplay = new ShaderElement(this.rgmbTextureAlphaShader, new Vector2(0.2f, 0.2f), true);
this.rgbmTextureAlphaDisplay.Position = new Vector2(0.7f, 0.2f);
this.rgbmTextureDisplay.Position = new Vector2(0.7f, 0.4f);
this.bloomTextureDisplay.Position = new Vector2(0.7f, 0.6f);
this.drawToScreen.Add(this.rgbmTextureDisplay);
this.drawToScreen.Add(this.rgbmTextureAlphaDisplay);
this.drawToScreen.Add(this.bloomTextureDisplay);
//setup the render config
this.configEditor = new RenderConfigEditor(this.Content);
this.drawToScreen.Add(configEditor);
this.UpdateManager.Add(configEditor);
//add a statistics overlay.
drawStats = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
drawToScreen.Add(drawStats);
}
protected override void Initialise()
{
//Xen.Ex provides a very useful Camera3D called 'FirstPersonControlledCamera3D'.
//This camera uses player input to act as a simple first-person style flythrough camera
Xen.Camera.FirstPersonControlledCamera3D camera = null;
//it uses player input, so the UpdateManager must be passed in
camera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager);
//in this case, we want the z-axis to be the up/down axis (otherwise it's the Y-axis)
camera.ZAxisUp = true;
//also it's default is a bit too fast moving
camera.MovementSensitivity *= 0.1f;
camera.LookAt(new Vector3(1, 0, 0), new Vector3(), new Vector3(0, 0, 1));
this.camera = camera;
//create the draw target.
drawToScreen = new DrawTargetScreen(camera);
//create a large number of actor instance from tutorial 10..
for (int n = 0; n <= 16; n++)
{
//create in a half circle
float angle = (n / 16.0f) * MathHelper.Pi;
var position = new Vector3((float)Math.Sin(angle), (float)Math.Cos(angle), 0);
//not too close together
position *= 10;
drawToScreen.Add(new Tutorial_10.Actor(this.Content, position));
}
//this element will display the camera position
positionDisplay = new TextElement();
//TextElement (unlike other Elements) defaults to Top Left alignment
//So, in order to bring it closer to the centre of the screen (due to potential overscan)
//it's position needs to be set 'right' and 'down' from 'top left'
//(this is just an example, see XNA docs for correct overscan compensation behaviour)
positionDisplay.Position = new Vector2(40, -40); //offset from top left corner alignment
//add it to the screen
drawToScreen.Add(positionDisplay);
var sizeInPixels = new Vector2(400, 200);
//create the main block of yellow text
this.yellowElement = new TextElementRect(sizeInPixels);
this.yellowElement.Colour = Color.Yellow;
//first line of text... this will have a flashing 2D element embedded
string embeddedText = @"This is a text box with a large amount of custom text! It also includes an embedded 2D element: , which is a 16x16 SolidColourElement";
uint insertAtIndex = 96; // Hard coded to insert a 2D element at character index 96 which is about here: ^
//add a bunch of text...
this.yellowElement.Text.AppendLine(embeddedText);
this.yellowElement.Text.AppendLine();
this.yellowElement.Text.AppendLine(@"This class is:");
this.yellowElement.Text.AppendLine(this.GetType().FullName);
this.yellowElement.Text.AppendLine(@"It is located in assembly:");
this.yellowElement.Text.AppendLine(this.GetType().Assembly.FullName);
this.yellowElement.Text.AppendLine();
//add an embedded 2D element within the text
//create it..
this.embeddedElement = new SolidColourElement(Color.Red, new Vector2(16, 16)); // quite small
this.embeddedElement.AlphaBlendState = AlphaBlendState.Alpha;
//add it.
this.yellowElement.AddInline(this.embeddedElement, insertAtIndex);
#if XBOX360
this.yellowElement.Text.AppendLine(@"Press and hold both thumbsticks to show the debug overlay");
#else
this.yellowElement.Text.AppendLine(@"Press F12 to show the debug overlay");
#endif
//align the element rectangle to the bottom centre of the screen
this.yellowElement.VerticalAlignment = VerticalAlignment.Bottom;
this.yellowElement.HorizontalAlignment = HorizontalAlignment.Centre;
//centre align the text
this.yellowElement.TextHorizontalAlignment = TextHorizontalAlignment.Centre;
//centre the text in the middle of the 400x200 area of the element rectangle
this.yellowElement.TextVerticalAlignment = VerticalAlignment.Centre;
//add it to the screen
drawToScreen.Add(yellowElement);
//create the statistics display
//this class will query the DrawState for the previous frames DrawStatistics structure.
//this structure provides a large number of statistics for the drawn frame.
//The DrawStatisticsDisplay displays some of the more important statistics. It will also
//display thread activity on the xbox.
//DrawStatistics are only available in DEBUG xen builds
//They can be accessed at runtime with DrawState GetPreviousFrameStatistics()
//at runtime, pressing 'F12' will toggle the overlay (or holding both thumbsticks on x360)
this.statisticsOverlay = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
//then add it to the screen
drawToScreen.Add(statisticsOverlay);
}
protected override void Initialise()
{
Camera3D camera = new Xen.Camera.FirstPersonControlledCamera3D(this.UpdateManager, Vector3.Zero,true);
//create the draw target.
drawToScreen = new DrawTargetScreen(camera);
drawToScreen.ClearBuffer.ClearColour = Color.CornflowerBlue;
//NEW CODE
//create a BatchModel, this class stores the ModelData and will draw BatchModelInstances
this.batchModel = new BatchModel();
//this.batchModel.ShaderProvider = new SimpleShaderProvider<Tutorial_16.Shader.Tutorial16>();
//NEW CODE
//create a large number of actors (1600)
for (float x = -20; x < 20; x++)
for (float y = -20; y < 20; y++)
{
drawToScreen.Add(new Actor(this.batchModel, new Vector3(x * 5, y * 5, -5)));
}
//this is the most important bit...
//always add the BatchModel itself to the draw target,
//this should be added *after* all BatchModelInstances have been added
//Note: each time a BatchModelInstance is drawn, it will store it's world matrix in the BatchModel
//If the BatchModel is not drawn, the buffer storing these matrices will not be emptied, and will
//eventually throw an OutOfMemoryException exception.
this.drawToScreen.Add(batchModel);
statistics = new Xen.Ex.Graphics2D.Statistics.DrawStatisticsDisplay(this.UpdateManager);
this.drawToScreen.Add(statistics);
}