/// <summary>
/// Show shadows with help of our blur map shader
/// </summary>
public void ShowShadows()
{
// Only apply post screen blur if texture is valid and effect are valid
if (blurMapTexture == null ||
Valid == false ||
// If the shadow scene map is not yet filled, there is no point
// continuing here ...
blurMapTexture.XnaTexture == null)
{
return;
}
// Don't use or write to the z buffer
BaseGame.Device.DepthStencilState = DepthStencilState.None;
// Make sure we clamp everything to 0-1
BaseGame.Device.SamplerStates[0] = SamplerState.LinearClamp;
// Restore back buffer as render target
//not required: BaseGame.ResetRenderTarget(false);
if (blurMap != null)
{
blurMap.SetValue(blurMapTexture.XnaTexture);
}
effect.CurrentTechnique = effect.Techniques["ScreenAdvancedBlur20"];
// We must have exactly 2 passes!
if (effect.CurrentTechnique.Passes.Count != 2)
{
throw new InvalidOperationException(
"This shader should have exactly 2 passes!");
}
// Render second pass
// Use ZeroSourceBlend alpha mode for the final result
BaseGame.Device.BlendState = ZeroSourceBlend;
/*BaseGame.Device.RenderState.AlphaBlendEnable = true;
* BaseGame.Device.RenderState.AlphaBlendOperation = BlendFunction.Add;
* BaseGame.Device.RenderState.SourceBlend = Blend.Zero;
* BaseGame.Device.RenderState.DestinationBlend = Blend.SourceColor;*/
EffectPass effectPass = effect.CurrentTechnique.Passes[1];
effectPass.Apply();
VBScreenHelper.Render();
// Restore z buffer state
BaseGame.Device.DepthStencilState = DepthStencilState.Default;
// Set u/v addressing back to wrap
BaseGame.Device.SamplerStates[0] = SamplerState.LinearWrap;
// Restore normal alpha blending
//BaseGame.Device.RenderState.BlendFunction = BlendFunction.Add;
BaseGame.SetCurrentAlphaMode(BaseGame.AlphaMode.Default);
}
/// <summary>
/// Show shadows with help of our blur map shader
/// </summary>
public void RenderShadows()
{
// Only apply post screen blur if texture is valid and effect are valid
if (sceneMapTexture == null ||
Valid == false ||
// If the shadow scene map is not yet filled, there is no point
// continuing here ...
sceneMapTexture.XnaTexture == null)
{
return;
}
// Don't use or write to the z buffer
BaseGame.Device.DepthStencilState = DepthStencilState.None;
// Disable alpha for the first pass
BaseGame.Device.BlendState = BlendState.Opaque;
if (windowSize != null)
{
windowSize.SetValue(
new float[] { sceneMapTexture.Width, sceneMapTexture.Height });
}
if (sceneMap != null)
{
sceneMap.SetValue(sceneMapTexture.XnaTexture);
}
effect.CurrentTechnique = effect.Techniques["ScreenAdvancedBlur20"];
// We must have exactly 2 passes!
if (effect.CurrentTechnique.Passes.Count != 2)
{
throw new InvalidOperationException(
"This shader should have exactly 2 passes!");
}
// Just start pass 0
blurMapTexture.SetRenderTarget();
EffectPass effectPass = effect.CurrentTechnique.Passes[0];
effectPass.Apply();
VBScreenHelper.Render();
blurMapTexture.Resolve();
BaseGame.ResetRenderTarget(false);
// Restore z buffer state
BaseGame.Device.DepthStencilState = DepthStencilState.Default;
// Set u/v addressing back to wrap
BaseGame.Device.SamplerStates[0] = SamplerState.LinearWrap;
// Restore normal alpha blending
//BaseGame.Device.RenderState.BlendFunction = BlendFunction.Add;
BaseGame.SetCurrentAlphaMode(BaseGame.AlphaMode.Default);
}
/// <summary>
/// Execute shaders and show result on screen, Start(..) must have been
/// called before and the scene should be rendered to sceneMapTexture.
/// </summary>
public virtual void Show()
{
// Only apply post screen glow if texture is valid and effect is valid
if (sceneMapTexture == null ||
Valid == false ||
started == false)
{
return;
}
started = false;
// Resolve sceneMapTexture render target for Xbox360 support
sceneMapTexture.Resolve();
// Don't use or write to the z buffer
BaseGame.Device.RenderState.DepthBufferEnable = false;
BaseGame.Device.RenderState.DepthBufferWriteEnable = false;
// Also don't use any kind of blending.
BaseGame.Device.RenderState.AlphaBlendEnable = false;
if (windowSize != null)
{
windowSize.SetValue(
new float[] { sceneMapTexture.Width, sceneMapTexture.Height });
}
if (sceneMap != null)
{
sceneMap.SetValue(sceneMapTexture.XnaTexture);
}
if (timer != null)
{
// Add a little offset to prevent first effect.
timer.SetValue(BaseGame.TotalTime + 0.75f);
}
effect.CurrentTechnique = effect.Techniques["ScreenGlow20"];
// We must have exactly 4 passes!
if (effect.CurrentTechnique.Passes.Count != 4)
{
throw new InvalidOperationException(
"This shader should have exactly 4 passes!");
}
try
{
effect.Begin();
for (int pass = 0; pass < effect.CurrentTechnique.Passes.Count; pass++)
{
if (pass == 0)
{
downsampleMapTexture.SetRenderTarget();
}
else if (pass == 1)
{
blurMap1Texture.SetRenderTarget();
}
else if (pass == 2)
{
blurMap2Texture.SetRenderTarget();
}
else
{
// Do a full reset back to the back buffer
BaseGame.ResetRenderTarget(true);
}
EffectPass effectPass = effect.CurrentTechnique.Passes[pass];
effectPass.Begin();
VBScreenHelper.Render();
effectPass.End();
if (pass == 0)
{
downsampleMapTexture.Resolve();
if (downsampleMap != null)
{
downsampleMap.SetValue(downsampleMapTexture.XnaTexture);
}
effect.CommitChanges();
}
else if (pass == 1)
{
blurMap1Texture.Resolve();
if (blurMap1 != null)
{
blurMap1.SetValue(blurMap1Texture.XnaTexture);
}
effect.CommitChanges();
}
else if (pass == 2)
{
blurMap2Texture.Resolve();
if (blurMap2 != null)
{
blurMap2.SetValue(blurMap2Texture.XnaTexture);
}
effect.CommitChanges();
}
}
}
finally
{
effect.End();
// Restore z buffer state
BaseGame.Device.RenderState.DepthBufferEnable = true;
BaseGame.Device.RenderState.DepthBufferWriteEnable = true;
}
}
/// <summary>
/// Execute shaders and show result on screen, Start(..) must have been
/// called before and the scene should be rendered to sceneMapTexture.
/// </summary>
public override void Show()
{
// Only apply post screen glow if texture is valid and effect is valid
if (sceneMapTexture == null ||
effect == null ||
started == false)
{
return;
}
started = false;
// Resolve sceneMapTexture render target for Xbox360 support
sceneMapTexture.Resolve();
// Don't use or write to the z buffer
BaseGame.Device.RenderState.DepthBufferEnable = false;
BaseGame.Device.RenderState.DepthBufferWriteEnable = false;
// Also don't use any kind of blending.
//Update: allow writing to alpha!
BaseGame.Device.RenderState.AlphaBlendEnable = false;
if (windowSize != null)
{
windowSize.SetValue(
new float[] { sceneMapTexture.Width, sceneMapTexture.Height });
}
if (sceneMap != null)
{
sceneMap.SetValue(sceneMapTexture.XnaTexture);
}
RadialBlurScaleFactor =
// Warning: To big values will make the motion blur look to
// stepy (we see each step and thats not good). -0.02 should be max.
-(0.0025f + RacingGameManager.Player.Speed * 0.005f /
Player.DefaultMaxSpeed);
effect.CurrentTechnique = effect.Techniques["ScreenGlow20"];
// We must have exactly 5 passes!
if (effect.CurrentTechnique.Passes.Count != 5)
{
throw new InvalidOperationException(
"This shader should have exactly 5 passes!");
}
try
{
effect.Begin();
for (int pass = 0; pass < effect.CurrentTechnique.Passes.Count;
pass++)
{
if (pass == 0)
{
radialSceneMapTexture.SetRenderTarget();
}
else if (pass == 1)
{
downsampleMapTexture.SetRenderTarget();
}
else if (pass == 2)
{
blurMap1Texture.SetRenderTarget();
}
else if (pass == 3)
{
blurMap2Texture.SetRenderTarget();
}
else
{
// Do a full reset back to the back buffer
BaseGame.ResetRenderTarget(true);
}
EffectPass effectPass = effect.CurrentTechnique.Passes[pass];
effectPass.Begin();
// For first effect we use radial blur, draw it with a grid
// to get cooler results (more blur at borders than in middle).
if (pass == 0)
{
VBScreenHelper.Render10x10Grid();
}
else
{
VBScreenHelper.Render();
}
effectPass.End();
if (pass == 0)
{
radialSceneMapTexture.Resolve();
if (radialSceneMap != null)
{
radialSceneMap.SetValue(radialSceneMapTexture.XnaTexture);
}
effect.CommitChanges();
}
else if (pass == 1)
{
downsampleMapTexture.Resolve();
if (downsampleMap != null)
{
downsampleMap.SetValue(downsampleMapTexture.XnaTexture);
}
effect.CommitChanges();
}
else if (pass == 2)
{
blurMap1Texture.Resolve();
if (blurMap1 != null)
{
blurMap1.SetValue(blurMap1Texture.XnaTexture);
}
effect.CommitChanges();
}
else if (pass == 3)
{
blurMap2Texture.Resolve();
if (blurMap2 != null)
{
blurMap2.SetValue(blurMap2Texture.XnaTexture);
}
effect.CommitChanges();
}
}
}
finally
{
effect.End();
// Restore z buffer state
BaseGame.Device.RenderState.DepthBufferEnable = true;
BaseGame.Device.RenderState.DepthBufferWriteEnable = true;
}
}
