/// <summary>
/// Given a world object, the renderer draws it using the
/// XNA frameworks
/// </summary>
/// <param name="world">The world object to render</param>
/// <returns></returns>
public bool RenderWorld(World world)
{
world.SortEntities();
ClearScreen();
Effect shader = assetManager.GetEffect("shaders/sprite/SimpleSprite");
Effect channel = assetManager.GetEffect("shaders/ChannelRender");
Vector2 viewportTrans = new Vector2(graphicsDevice.Viewport.Width / 2, graphicsDevice.Viewport.Height / 2);
SpriteBatch spriteBatch = new SpriteBatch(graphicsDevice);
// Step 1: Generate a stencil of which pixels to render
// Draw the actual sprites
Color[] t = { Color.White, Color.Yellow, Color.Purple, Color.Blue };
int i = 0;
ClearRenderTargets();
List<Entity> lstEntities = world.GetEntities();
// First pass: Draw the entities
// This pass generates the dif, nrm and hgt textures
// Objects intersect as if in 3D
RenderEntities(lstEntities, spriteBatch, m_rtDif, m_rtDepthStencil, m_rtNormal, temp);
// Render the lights!
RenderLights(lstEntities, spriteBatch, m_rtDif, m_rtDepthStencil, m_rtNormal, m_rtLights, m_rtSpc, temp);
// Render the overlays!
Texture2D lightPos = assetManager.GetTexture("sprites/test/lightpos");
Texture2D lightBulb = assetManager.GetTexture("sprites/test/lightbulb");
graphicsDevice.SetRenderTarget(m_rtOverlay);
if (m_bDrawLights)
{
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
foreach (Entity ent in lstEntities)
{
if (ent.Type != EntityType.Light)
continue;
Entities.Lights.Light light = (Entities.Lights.Light)ent;
Vector2 posBase = Project(new Vector3(light.Position.X, light.Position.Y, 0));
Vector2 posBulb = Project(new Vector3(light.Position.X, light.Position.Y, light.Z));
spriteBatch.Draw(lightPos, posBase, light.Color);
spriteBatch.Draw(lightBulb, posBulb, light.Color);
}
spriteBatch.End();
}
// Render out 'selection rectangles'
Texture2D selectionRect = new Texture2D(graphicsDevice, 1, 1);
selectionRect.SetData<Color>(new[] { Color.Red });
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
foreach (Entity ent in lstEntities)
{
if (!ent.Selected)
continue;
Vector2 upperLeft = Project(new Vector3(ent.Position.X, ent.Position.Y, ent.Type==EntityType.Sprite?ent.Z:0));
upperLeft.X -= 2;
upperLeft.Y -= 2;
Vector2 size = new Vector2(14, 14);
if (ent.Type == EntityType.Sprite)
{
Texture2D sprite = assetManager.GetTexture(ent.Sprite + "/dif");
size = new Vector2(sprite.Width+4, sprite.Height+4);
}
spriteBatch.Draw(selectionRect, new Rectangle((int)upperLeft.X, (int)upperLeft.Y, 1, (int)size.Y), Color.White);
spriteBatch.Draw(selectionRect, new Rectangle((int)upperLeft.X, (int)upperLeft.Y, (int)size.X, 1), Color.White);
spriteBatch.Draw(selectionRect, new Rectangle((int)(upperLeft.X+size.X), (int)upperLeft.Y, 1, (int)size.Y), Color.White);
spriteBatch.Draw(selectionRect, new Rectangle((int)(upperLeft.X), (int)(upperLeft.Y+size.Y), (int)size.X, 1), Color.White);
}
spriteBatch.End();
////////////////////////////////////////////////////////////////////
// finalResult stores the final beauty pass
// That is, a combination of the dif and the lighting outputs
graphicsDevice.SetRenderTarget(finalResult);
graphicsDevice.Textures[1] = m_rtLights;
graphicsDevice.Textures[2] = m_rtSpc;
Effect combine = assetManager.GetEffect("shaders/Combine");
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
combine.Parameters["scalarAdd"].SetValue(m_colAmbient.ToVector4() * m_fAmbientIntensity);
combine.Techniques[0].Passes[0].Apply();
spriteBatch.Draw(m_rtDif, Vector2.Zero, Color.White);
spriteBatch.End();
//////////////////////////////////////////////////////////////////
graphicsDevice.SetRenderTarget(null);
graphicsDevice.Clear(Color.Transparent);
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
switch(m_rstType)
{
case RenderSceneType.Diffuse:
spriteBatch.Draw(m_rtDif, Vector2.Zero, Color.White);
break;
case RenderSceneType.Height:
spriteBatch.Draw(m_rtDepthStencil, Vector2.Zero, Color.White);
break;
case RenderSceneType.Normal:
spriteBatch.Draw(m_rtNormal, Vector2.Zero, Color.White);
break;
case RenderSceneType.Lights:
spriteBatch.Draw(m_rtLights, Vector2.Zero, Color.White);
break;
case RenderSceneType.Beauty:
spriteBatch.Draw(finalResult, Vector2.Zero, Color.White);
break;
}
spriteBatch.Draw(m_rtOverlay, Vector2.Zero, Color.White);
spriteBatch.End();
return true;
}
