public void Begin(Xen.Graphics.ShaderSystem.ShaderSystemBase state, bool ic, bool ec, Xen.Graphics.ShaderSystem.ShaderExtension ext)
{
if (device != state.DeviceUniqueIndex)
{
device = state.DeviceUniqueIndex;
fx.Dispose();
state.CreateEffect(out fx, fxb, 0, 0);
}
float randX = (float)(random.NextDouble());
float randY = (float)(random.NextDouble());
this.psConstants[4].Z = randX;
this.psConstants[4].W = randY;
//random texture is limited in size, so randomly offset by a tiny amount
randX = (float)((random.NextDouble() * 2 - 1) / 256.0);
randY = (float)((random.NextDouble() * 2 - 1) / 256.0);
this.psConstants[5].X = randX;
this.psConstants[5].Y = randY;
TextureSamplerState point = TextureSamplerState.PointFiltering;
Xen.Graphics.ShaderSystem.ShaderSystemBase shaderSystem = (Xen.Graphics.ShaderSystem.ShaderSystemBase)state;
shaderSystem.SetPixelShaderSampler(0, randTexture, point);
if (positionSize != null)
shaderSystem.SetPixelShaderSampler(1, positionSize, point);
if (velocityRotation != null)
shaderSystem.SetPixelShaderSampler(2, velocityRotation, point);
if (this.colourSamplerIndex != -1)
shaderSystem.SetPixelShaderSampler(this.colourSamplerIndex, colourValues, point);
if (this.userSamplerIndex != -1)
shaderSystem.SetPixelShaderSampler(this.userSamplerIndex, userValues, point);
if (this.lifeSamplerIndex != -1)
shaderSystem.SetPixelShaderSampler(this.lifeSamplerIndex, lifeTexture, point);
state.SetWorldViewProjectionMatrix(ref this.vreg[0], ref this.vreg[1], ref this.vreg[2], ref this.vreg[3], ref this.world);
const float randTextureSize = (float)RandomValueTexture.Resolution;
const float invRandTextureSize = 1.0f / randTextureSize;
if (enabledMoveVS || enabledAddVS)
{
for (int i = 0; i < 4; i++) //copy the WVP matrix
this.vsMoveConstants[i] = this.vreg[i];
vsMoveConstants[6] = new Vector4(randTextureSize, invRandTextureSize, 0, 0);
fx.vs_c.SetValue(this.vsMoveConstants);
fx.ps_c.SetValue(psConstants);
}
else
{
state.SetWindowSizeVector2(ref this.vreg[4], ref this.viewsize);
this.vreg[6] = new Vector4(randTextureSize, invRandTextureSize, 0, 0);
fx.vs_c.SetValue(this.vreg);
fx.ps_c.SetValue(psConstants);
}
state.SetEffect(this, ref fx, Xen.Graphics.ShaderSystem.ShaderExtension.None);
}
