private void InitBillboard()
{
fBillboardChanged = false;
if (fBillboard == null)
{
fBillboard = new Billboard(GraphicsDevice);
}
else
{
fBillboard.Clear();
}
fBillboard.UseVertexBuffer = fUseVertexBuffer;
foreach (MyPoint point in fPoints)
{
Color color = Color.White;
Vector3 direction = point.Direction;
int r = (byte)(128 + 127 * direction.X);
int g = (byte)(128 + 127 * direction.Y);
int b = (byte)(128 + 127 * direction.Z);
color = new Color(r, g, b, 255);
fBillboard.AddObject(point.Position, color, point.Size);
}
}
private void InitBillboard()
{
if (fBillboard1 == null)
{
fBillboard1 = new Billboard(GraphicsDevice);
fBillboard2 = new Billboard(GraphicsDevice);
fBillboard3 = new Billboard(GraphicsDevice);
}
else
{
fBillboard1.Clear();
fBillboard2.Clear();
fBillboard3.Clear();
}
fBillboard1.Mode = fBillboard2.Mode = fBillboard3.Mode = fDrawMode;
foreach (MyPoint point in fPoints)
{
Color color = Color.White;
switch (point.TextureIndex)
{
case 0:
fBillboard1.AddObject(point.Position, color, point.Size);
break;
case 1:
fBillboard2.AddObject(point.Position, color, point.Size);
break;
case 2:
fBillboard3.AddObject(point.Position, color, point.Size);
break;
}
}
}
/// <summary>
/// Allows the game component to draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
Dictionary <Texture2D, Billboard> billboards = new Dictionary <Texture2D, Billboard>();
foreach (Particle particle in fParticles)
{
Texture2D texture = particle.Texture;
if (texture == null)
{
SetParticleTexture(particle);
texture = particle.Texture;
}
if (!billboards.ContainsKey(texture))
{
billboards.Add(texture, new Billboard(GraphicsDevice));
}
Billboard billboard = billboards[texture];
billboard.AddObject(
new Vector3(particle.Position.X, particle.Position.Y, 0),
Color.White, particle.Size);
}
//--------------------
GraphicsDevice.BlendState = fBlendState;
GraphicsDevice.DepthStencilState = DepthStencilState.None;
Matrix vp = fCamera.Camera.ViewMatrix * fCamera.Camera.ProjectionMatrix;
fShader.Parameters["world"].SetValue(fCamera.Camera.WorldMatrix);
fShader.Parameters["vp"].SetValue(vp);
int i = 0;
foreach (KeyValuePair <Texture2D, Billboard> kvp in billboards)
{
fShader.Parameters["particleTexture"].SetValue(kvp.Key);
for (int ps = 0; ps < fShader.CurrentTechnique.Passes.Count; ps++)
{
fShader.CurrentTechnique.Passes[ps].Apply();
kvp.Value.Render();
}
i++;
}
//--------------------
base.Draw(gameTime);
}