public GPUParticle(GPUParticleVBA vba, int index)
{
_vba = vba;
_vbaIndex = index;
}
private void UnloadShader()
{
vertexBuffer?.Dispose();
indexBuffer?.Dispose();
particlePool = null;
vboArray = null;
}
private void LoadShader()
{
UnloadShader();
geometryCount = FloatMath.Ceiling(_config.SpawnRate * _config.ParticleLifetimeMax);
// Create Particle Pool
particlePool = new GPUParticle[geometryCount];
vboArray = new GPUParticleVBA(geometryCount);
for (int i = 0; i < geometryCount; i++)
{
particlePool[i] = new GPUParticle(vboArray, i)
{
StartPosition = Position,
Random = new Vector4(FloatMath.GetRandom(), FloatMath.GetRandom(), FloatMath.GetRandom(), FloatMath.GetRandom()),
StartTimeOffset = Config.SpawnDelay * i
};
InitializeParticle(particlePool[i], i, geometryCount);
particlePool[i].UpdateVBO();
}
// Create VertexBuffer and IndexBuffer
vertexBuffer = new VertexBuffer(Owner.GraphicsDevice, GPUParticleVBO.VertexDeclaration, geometryCount * 4, BufferUsage.WriteOnly);
vertexBuffer.SetData(vboArray.Data);
if (geometryCount * 6 < short.MaxValue)
{
short[] indices = new short[geometryCount * 6];
for (short i = 0; i < geometryCount; i++)
{
// TR triangle
indices[i * 6 + 0] = (short)(i * 4 + 0);
indices[i * 6 + 1] = (short)(i * 4 + 2);
indices[i * 6 + 2] = (short)(i * 4 + 1);
// BL triangle
indices[i * 6 + 3] = (short)(i * 4 + 0);
indices[i * 6 + 4] = (short)(i * 4 + 3);
indices[i * 6 + 5] = (short)(i * 4 + 2);
}
indexBuffer = new IndexBuffer(Owner.GraphicsDevice, typeof(short), geometryCount * 6, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
}
else
{
int[] indices = new int[geometryCount * 6];
for (int i = 0; i < geometryCount; i++)
{
// TR triangle
indices[i * 6 + 0] = (i * 4 + 0);
indices[i * 6 + 1] = (i * 4 + 2);
indices[i * 6 + 2] = (i * 4 + 1);
// BL triangle
indices[i * 6 + 3] = (i * 4 + 0);
indices[i * 6 + 4] = (i * 4 + 3);
indices[i * 6 + 5] = (i * 4 + 2);
}
indexBuffer = new IndexBuffer(Owner.GraphicsDevice, typeof(int), geometryCount * 6, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
}
// Load effect
particleEffect = Owner.Game.Content.Load<Effect>("shaders/SAMParticleEffect").Clone();
// World Config
parameterOffset = particleEffect.Parameters["Offset"];
parameterVirtualViewport = particleEffect.Parameters["VirtualViewport"];
parameterCurrentTime = particleEffect.Parameters["CurrentTime"];
// Particle Config
particleEffect.Parameters["Texture"]?.SetValue(Config.Texture.Texture);
particleEffect.Parameters["TextureProjection"]?.SetValue(Config.Texture.GetShaderProjectionMatrix().ToMatrix());
particleEffect.Parameters["ParticleLifetimeMin"]?.SetValue(Config.ParticleLifetimeMin);
particleEffect.Parameters["ParticleLifetimeMax"]?.SetValue(Config.ParticleLifetimeMax);
particleEffect.Parameters["ParticleRespawnTime"]?.SetValue(Config.ParticleRespawnTime);
particleEffect.Parameters["ParticleSpawnAngleMin"]?.SetValue(Config.ParticleSpawnAngleMin);
particleEffect.Parameters["ParticleSpawnAngleMax"]?.SetValue(Config.ParticleSpawnAngleMax);
particleEffect.Parameters["ParticleSpawnAngleIsRandom"]?.SetValue(Config.ParticleSpawnAngleIsRandom);
particleEffect.Parameters["FixedParticleSpawnAngle"]?.SetValue(Config.FixedParticleSpawnAngle);
particleEffect.Parameters["ParticleVelocityMin"]?.SetValue(Config.ParticleVelocityMin);
particleEffect.Parameters["ParticleVelocityMax"]?.SetValue(Config.ParticleVelocityMax);
particleEffect.Parameters["ParticleAlphaInitial"]?.SetValue(Config.ParticleAlphaInitial);
particleEffect.Parameters["ParticleAlphaFinal"]?.SetValue(Config.ParticleAlphaFinal);
particleEffect.Parameters["ParticleSizeInitialMin"]?.SetValue(Config.ParticleSizeInitialMin);
particleEffect.Parameters["ParticleSizeInitialMax"]?.SetValue(Config.ParticleSizeInitialMax);
particleEffect.Parameters["ParticleSizeFinalMin"]?.SetValue(Config.ParticleSizeFinalMin);
particleEffect.Parameters["ParticleSizeFinalMax"]?.SetValue(Config.ParticleSizeFinalMax);
particleEffect.Parameters["ColorInitial"]?.SetValue(Config.ColorInitial.ToVector4(Config.ParticleAlphaInitial));
particleEffect.Parameters["ColorFinal"]?.SetValue(Config.ColorFinal.ToVector4(Config.ParticleAlphaInitial));
}
public GPUParticle(GPUParticleVBA vba, int index)
{
_vba = vba;
_vbaIndex = index;
}