private void InitialiseBuffer()
{
// dispose exiting buffers
if (this.vertices != null)
{
this.vertices.Dispose();
}
if (this.indices != null)
{
this.indices.Dispose();
}
// create new vertex buffer
this.vertices = new DynamicVertexBuffer(device, ParticleVertex.VertexDeclaration, Capacity * 4, BufferUsage.WriteOnly);
// set up quad corners
var particles = new ParticleVertex[Capacity * 4];
for (int i = 0; i < Capacity; i++)
{
particles[i * 4 + 0].Corner = new Short2(-1, -1);
particles[i * 4 + 1].Corner = new Short2(1, -1);
particles[i * 4 + 2].Corner = new Short2(1, 1);
particles[i * 4 + 3].Corner = new Short2(-1, 1);
}
// copy over any exiting active particles
int j = 0;
for (int i = active * 4; i != free * 4; i = (i + 1) % particles.Length)
{
particles[j] = this.particles[i];
j++;
}
// swap array over to the new larger array
this.particles = particles;
// create new index buffer
ushort[] indices = new ushort[Capacity * 6];
for (int i = 0; i < Capacity; i++)
{
indices[i * 6 + 0] = (ushort)(i * 4 + 0);
indices[i * 6 + 1] = (ushort)(i * 4 + 1);
indices[i * 6 + 2] = (ushort)(i * 4 + 2);
indices[i * 6 + 3] = (ushort)(i * 4 + 0);
indices[i * 6 + 4] = (ushort)(i * 4 + 2);
indices[i * 6 + 5] = (ushort)(i * 4 + 3);
}
this.indices = new IndexBuffer(device, typeof(ushort), indices.Length, BufferUsage.WriteOnly);
this.indices.SetData(indices);
dirty = false;
}
private void InitialiseBuffer()
{
// dispose exiting buffers
if (this.vertices != null)
this.vertices.Dispose();
if (this.indices != null)
this.indices.Dispose();
// create new vertex buffer
this.vertices = new DynamicVertexBuffer(device, ParticleVertex.VertexDeclaration, Capacity * 4, BufferUsage.WriteOnly);
// set up quad corners
var particles = new ParticleVertex[Capacity * 4];
for (int i = 0; i < Capacity; i++)
{
particles[i * 4 + 0].Corner = new Short2(-1, -1);
particles[i * 4 + 1].Corner = new Short2(1, -1);
particles[i * 4 + 2].Corner = new Short2(1, 1);
particles[i * 4 + 3].Corner = new Short2(-1, 1);
}
// copy over any exiting active particles
int j = 0;
for (int i = active *4; i != free * 4; i = (i + 1) % particles.Length)
{
particles[j] = this.particles[i];
j++;
}
// swap array over to the new larger array
this.particles = particles;
// create new index buffer
ushort[] indices = new ushort[Capacity * 6];
for (int i = 0; i < Capacity; i++)
{
indices[i * 6 + 0] = (ushort)(i * 4 + 0);
indices[i * 6 + 1] = (ushort)(i * 4 + 1);
indices[i * 6 + 2] = (ushort)(i * 4 + 2);
indices[i * 6 + 3] = (ushort)(i * 4 + 0);
indices[i * 6 + 4] = (ushort)(i * 4 + 2);
indices[i * 6 + 5] = (ushort)(i * 4 + 3);
}
this.indices = new IndexBuffer(device, typeof(ushort), indices.Length, BufferUsage.WriteOnly);
this.indices.SetData(indices);
dirty = false;
}