/// <summary>
/// Method to do the deferred lighting draw call
/// </summary>
/// <param name="camera"></param>
public void DrawDeferred(DeferredLightingCamera camera)
{
GraphicsDevice.Clear(camera.ClearColor);
if (deferredSceneRenderEffect == null)
{
deferredSceneRenderEffect = Game.Content.Load <Effect>("Shaders/DeferredRender/DeferredSceneRender");
}
deferredSceneRenderEffect.Parameters["colorMap"].SetValue(camera.RenderTarget);
deferredSceneRenderEffect.Parameters["lightMap"].SetValue(lightMap);
//deferredSceneRenderEffect.Parameters["sgrMap"].SetValue(camera.SpecularGlowReflectionMap);
GraphicsDevice.BlendState = BlendState.Opaque;
GraphicsDevice.DepthStencilState = DepthStencilState.Default;
GraphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
GraphicsDevice.SamplerStates[0] = SamplerState.LinearWrap;
deferredSceneRenderEffect.CurrentTechnique.Passes[0].Apply();
if (sceneQuad == null)
{
sceneQuad = new ScreenQuad(Game);
sceneQuad.Initialize();
}
sceneQuad.Draw(-Vector2.One, Vector2.One);
}
public void DeferredLighting(GameTime gameTime, DeferredLightingCamera camera)
{
if (lightMap == null)
{
lightMap = new RenderTarget2D(GraphicsDevice, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8);
}
GraphicsDevice.SetRenderTarget(lightMap);
GraphicsDevice.Clear(Color.Black);
GraphicsDevice.BlendState = BlendState.Additive;
//use the same operation on the alpha channel
GraphicsDevice.DepthStencilState = DepthStencilState.None;
GraphicsDevice.SamplerStates[0] = SamplerState.PointWrap;
// Apply the glow value to the light map.
ApplyGlowMap(camera);
int lc = 0;
lc = DirectionalLights.Count;
for (int l = 0; l < lc; l++)
{
if (DirectionalLights[l].Intensity > 0 && DirectionalLights[l].Color != Color.Black)
{
RenderDirectionalLight(camera, DirectionalLights[l]);
}
}
lc = ConeLights.Count;
for (int l = 0; l < lc; l++)
{
if (ConeLights[l].Intensity > 0 && ConeLights[l].Color != Color.Black)
{
RenderConeLight(camera, ConeLights[l]);
}
}
lc = PointLights.Count;
for (int l = 0; l < lc; l++)
{
if (PointLights[l].Intensity > 0 && PointLights[l].Color != Color.Black)
{
RenderPointLight(camera, PointLights[l]);
}
}
GraphicsDevice.SetRenderTarget(null);
}
/// <summary>
/// Render a cone light
/// </summary>
/// <param name="camera"></param>
/// <param name="coneLight"></param>
public void RenderConeLight(DeferredLightingCamera camera, DeferredConeLight coneLight)
{
if (deferredConeLightEffect == null)
{
deferredConeLightEffect = Game.Content.Load <Effect>("Shaders/DeferredRender/DeferredConeLight");
}
// Load Light parameters
deferredConeLightEffect.Parameters["lightDirection"].SetValue(coneLight.Direction);
deferredConeLightEffect.Parameters["LightPosition"].SetValue(coneLight.Transform.Position);
deferredConeLightEffect.Parameters["Color"].SetValue(coneLight.Color.ToVector3());
deferredConeLightEffect.Parameters["ViewProjectionInv"].SetValue(Matrix.Invert(camera.View * camera.Projection));
deferredConeLightEffect.Parameters["LightViewProjection"].SetValue(coneLight.View * coneLight.Projection);
deferredConeLightEffect.Parameters["CameraPosition"].SetValue(camera.Transform.Position);
deferredConeLightEffect.Parameters["sgrMap"].SetValue(camera.SpecularGlowReflectionMap);
deferredConeLightEffect.Parameters["normalMap"].SetValue(camera.NormalBuffer);
deferredConeLightEffect.Parameters["depthMap"].SetValue(camera.DepthBuffer);
deferredConeLightEffect.Parameters["power"].SetValue(coneLight.Intensity);
deferredConeLightEffect.Parameters["ConeAngle"].SetValue(coneLight.Angle);
deferredConeLightEffect.Parameters["ConeDecay"].SetValue(coneLight.Decay);
deferredConeLightEffect.Parameters["CastShadow"].SetValue(coneLight.CastShadow);
if (coneLight.CastShadow)
{
deferredConeLightEffect.Parameters["shadowMap"].SetValue(coneLight.ShadowMap);
deferredConeLightEffect.Parameters["mod"].SetValue(deferredConeShadowMapMod);
deferredConeLightEffect.Parameters["DiscRadius"].SetValue(1.5f);
deferredConeLightEffect.Parameters["hardShadows"].SetValue(coneLight.HardShadows);
deferredConeLightEffect.Parameters["Taps"].SetValue(taps);
}
deferredConeLightEffect.CurrentTechnique.Passes[0].Apply();
// Set sampler state to Point as the Surface type requires it in XNA 4.0
GraphicsDevice.SamplerStates[0] = SamplerState.PointClamp;
if (sceneQuad == null)
{
sceneQuad = new ScreenQuad(Game);
sceneQuad.Initialize();
}
sceneQuad.Draw(-Vector2.One, Vector2.One);
}
/// <summary>
/// Apply the glow map
/// </summary>
/// <param name="camera"></param>
public void ApplyGlowMap(DeferredLightingCamera camera)
{
if (glowMapToLightMapEffect == null)
{
glowMapToLightMapEffect = Game.Content.Load <Effect>("Shaders/DeferredRender/GlowMapToLightMapShader");
}
glowMapToLightMapEffect.Parameters["sgrMap"].SetValue(camera.SpecularGlowReflectionMap);
glowMapToLightMapEffect.Techniques[0].Passes[0].Apply();
if (sceneQuad == null)
{
sceneQuad = new ScreenQuad(Game);
sceneQuad.Initialize();
}
sceneQuad.Draw(-Vector2.One, Vector2.One);
}
/// <summary>
/// Render a directional light.
/// </summary>
/// <param name="camera"></param>
/// <param name="directionalLight"></param>
public void RenderDirectionalLight(DeferredLightingCamera camera, DeferredDirectionalLight directionalLight)
{
if (deferredDirectionalLightEffect == null)
{
deferredDirectionalLightEffect = Game.Content.Load <Effect>("Shaders/DeferredRender/DeferredDirectionalLight");
}
// Call lighting methods.
deferredDirectionalLightEffect.Parameters["lightDirection"].SetValue(directionalLight.Direction);
deferredDirectionalLightEffect.Parameters["Color"].SetValue(directionalLight.Color.ToVector3());
deferredDirectionalLightEffect.Parameters["power"].SetValue(directionalLight.Intensity);
deferredDirectionalLightEffect.Parameters["CameraPosition"].SetValue(camera.Transform.Position);
deferredDirectionalLightEffect.Parameters["sgrMap"].SetValue(camera.SpecularGlowReflectionMap);
deferredDirectionalLightEffect.Parameters["normalMap"].SetValue(camera.NormalBuffer);
deferredDirectionalLightEffect.Parameters["depthMap"].SetValue(camera.DepthBuffer);
deferredDirectionalLightEffect.Parameters["CastShadow"].SetValue(directionalLight.CastShadow);
if (directionalLight.CastShadow)
{
deferredDirectionalLightEffect.Parameters["shadowMap"].SetValue(directionalLight.ShadowMap);
deferredDirectionalLightEffect.Parameters["mod"].SetValue(deferredDirectionalShadowMapMod);
deferredDirectionalLightEffect.Parameters["hardShadows"].SetValue(directionalLight.HardShadows);
deferredDirectionalLightEffect.Parameters["DiscRadius"].SetValue(1f);
deferredDirectionalLightEffect.Parameters["Taps"].SetValue(taps);
}
deferredDirectionalLightEffect.Parameters["viewProjectionInv"].SetValue(Matrix.Invert(camera.View * camera.Projection));
deferredDirectionalLightEffect.Parameters["lightViewProjection"].SetValue(directionalLight.View * directionalLight.Projection);
deferredDirectionalLightEffect.Techniques[0].Passes[0].Apply();
if (sceneQuad == null)
{
sceneQuad = new ScreenQuad(Game);
sceneQuad.Initialize();
}
sceneQuad.Draw(-Vector2.One, Vector2.One);
}
/// <summary>
/// Render a point light
/// </summary>
/// <param name="camera"></param>
/// <param name="pointLight"></param>
public void RenderPointLight(DeferredLightingCamera camera, DeferredPointLight pointLight)
{
if (deferredPointLightEffect == null)
{
deferredPointLightEffect = Game.Content.Load <Effect>("Shaders/DeferredRender/DeferredPointLight");
}
if (pointLightVolumeModel == null)
{
pointLightVolumeModel = Game.Content.Load <Model>("Models/PointLightVolume");
}
//set the G-Buffer parameters
deferredPointLightEffect.Parameters["normalMap"].SetValue(camera.NormalBuffer);
deferredPointLightEffect.Parameters["depthMap"].SetValue(camera.DepthBuffer);
deferredPointLightEffect.Parameters["sgrMap"].SetValue(camera.SpecularGlowReflectionMap);
//compute the light world matrix
//scale according to light radius, and translate it to light position
Matrix sphereWorldMatrix = Matrix.CreateScale(pointLight.Radius) * Matrix.CreateTranslation(pointLight.Transform.Position);
//light position
deferredPointLightEffect.Parameters["lightPosition"].SetValue(pointLight.Transform.Position);
//set the color, radius and Intensity
deferredPointLightEffect.Parameters["Color"].SetValue(pointLight.Color.ToVector3());
deferredPointLightEffect.Parameters["lightRadius"].SetValue(pointLight.Radius);
deferredPointLightEffect.Parameters["lightIntensity"].SetValue(pointLight.Intensity);
//parameters for specular computations
deferredPointLightEffect.Parameters["cameraPosition"].SetValue(camera.Transform.Position);
deferredPointLightEffect.Parameters["InvertViewProjection"].SetValue(Matrix.Invert(camera.View * camera.Projection));
Matrix[] transforms = new Matrix[pointLightVolumeModel.Bones.Count];
pointLightVolumeModel.CopyAbsoluteBoneTransformsTo(transforms);
Matrix meshWorld;
int mmpc;
for (int m = 0; m < pointLightVolumeModel.Meshes.Count; m++)
{
if (pointLightVolumeModel.Meshes[m].ParentBone != null)
{
meshWorld = transforms[pointLightVolumeModel.Meshes[m].ParentBone.Index] * sphereWorldMatrix;
}
else
{
meshWorld = transforms[0] * sphereWorldMatrix;
}
mmpc = pointLightVolumeModel.Meshes[m].MeshParts.Count;
for (int mp = 0; mp < mmpc; mp++)
{
deferredPointLightEffect.Parameters["wvp"].SetValue(meshWorld * camera.View * camera.Projection);
int pCnt = deferredPointLightEffect.CurrentTechnique.Passes.Count;
for (int p = 0; p < pCnt; p++)
{
deferredPointLightEffect.CurrentTechnique.Passes[p].Apply();
GraphicsDevice.SetVertexBuffer(pointLightVolumeModel.Meshes[m].MeshParts[mp].VertexBuffer);
GraphicsDevice.Indices = pointLightVolumeModel.Meshes[m].MeshParts[mp].IndexBuffer;
GraphicsDevice.DrawIndexedPrimitives(PrimitiveType.TriangleList, pointLightVolumeModel.Meshes[m].MeshParts[mp].VertexOffset, 0, pointLightVolumeModel.Meshes[m].MeshParts[mp].PrimitiveCount);
}
}
}
}
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
graphics.GraphicsProfile = GraphicsProfile.HiDef;
graphics.PreferredBackBufferWidth = 1920;
graphics.PreferredBackBufferHeight = 1080;
IsMouseVisible = true;
kbm = new KeyboardStateManager(this);
lightingManager = new DeferredLightingManager(this);
camera = new DeferredLightingCamera(this, .5f, 20000);
camera.Position = new Vector3(0, 1, 0);
camera.ClearColor = Color.Black;
Components.Add(camera);
Services.AddService(typeof(Base3DCamera), camera);
BaseSkyBox skyBox = new BaseSkyBox(this, "Textures/SkyBox/HMcubemap");
skyBox.effectAsset = "Shaders/DeferredRender/SkyBoxShader";
Components.Add(skyBox);
Plane plane = new Plane(this, "Shaders/DeferredRender/DeferredModelRender");
plane.ColorAsset = "Textures/cobbles";
plane.BumpAsset = "Textures/cobblesNormal";
plane.OcclusionAsset = "Textures/cobbleOcclusion";
plane.SpecularAsset = "Textures/cobblesSpecular";
plane.Scale = Vector3.One * 2;
plane.UVMultiplier = Vector2.One * 5;
plane.Position = new Vector3(0, -1, -20);
Components.Add(plane);
Base3DObject bunny = new Base3DObject(this, "Models/bunny", "Shaders/DeferredRender/DeferredModelRender");
bunny.Position = new Vector3(0, -1f, -20);
Components.Add(bunny);
Cube cube = new Cube(this, "Shaders/DeferredRender/DeferredModelRender");
cube.ColorAsset = "Textures/xnauguk";
cube.Position = new Vector3(-3, -.5f, -20);
Components.Add(cube);
Sphere sphere = new Sphere(this, "Shaders/DeferredRender/DeferredModelRender");
sphere.Scale = Vector3.One * 2;
sphere.Position = new Vector3(3, -0, -20);
sphere.ColorAsset = "Textures/brick";
sphere.BumpAsset = "Textures/brickNormal";
sphere.OcclusionAsset = "Textures/brickOcclusion";
sphere.SpecularAsset = "Textures/brickSpecular";
sphere.UVMultiplier = Vector2.One * 2;
Components.Add(sphere);
Cube sandBlock = new Cube(this, "Shaders/DeferredRender/DeferredModelRender");
sandBlock.ColorAsset = "Textures/sand";
sandBlock.BumpAsset = "Textures/sandNormal";
sandBlock.Position = new Vector3(-3, 1.5f, -20);
sandBlock.Rotate(Vector3.Up + Vector3.Forward + Vector3.Left, 15);
Components.Add(sandBlock);
DeferredDirectionalLight directionalLight = new DeferredDirectionalLight(this, new Vector3(10, 10, 10), Color.AliceBlue, 1, true);
directionalLight.Transform.LookAt(Vector3.Zero, 1, Vector3.Forward);
Components.Add(directionalLight);
lightingManager.AddLight(directionalLight);
DeferredPointLight pointLight = new DeferredPointLight(this, new Vector3(0, 1, -20), Color.Red, 10, 1, false);
Components.Add(pointLight);
lightingManager.AddLight(pointLight);
coneLight = new DeferredConeLight(this, new Vector3(-10, 5, -25), Color.Gold, 1, MathHelper.ToRadians(45), 5, true);
coneLight.Transform.LookAt(new Vector3(0, 0, -20), 1, Vector3.Forward);
Components.Add(coneLight);
lightingManager.AddLight(coneLight);
DeferredConeLight coneLight2 = new DeferredConeLight(this, new Vector3(0, 20, -20), Color.Green, 1, MathHelper.ToRadians(25), 50, true);
coneLight2.Transform.LookAt(new Vector3(0, 0, -20), 1, Vector3.Forward);
Components.Add(coneLight2);
lightingManager.AddLight(coneLight2);
// Shadow casters and receivers..
lightingManager.AddShadowCaster(bunny);
lightingManager.AddShadowCaster(cube);
lightingManager.AddShadowCaster(sphere);
lightingManager.AddShadowCaster(sandBlock);
}