protected internal override void Render(Scenes.Scene scene, Cameras.Camera camera, int viewportWidth, int viewportHeight)
{
sprites.Clear();
scene.TraverseVisible(c =>
{
var sprite = c as Sprite;
if (sprite != null) sprites.Add(sprite);
});
if (sprites.Count == 0) return;
// setup gl
GL.UseProgram( program );
GL.EnableVertexAttribArray( attributes.position );
GL.EnableVertexAttribArray( attributes.uv );
GL.Disable( EnableCap.CullFace);
GL.Enable( EnableCap.Blend);
GL.BindBuffer( BufferTarget.ArrayBuffer, vertexBuffer );
GL.VertexAttribPointer( attributes.position, 2, VertexAttribPointerType.Float, false, 2 * 8, 0 );
GL.VertexAttribPointer( attributes.uv, 2, VertexAttribPointerType.Float, false, 2 * 8, 8 );
GL.BindBuffer(BufferTarget.ElementArrayBuffer, elementBuffer );
GL.UniformMatrix4(uniforms.projectionMatrix, 16, false, camera.projectionMatrix.elements);
GL.ActiveTexture(TextureUnit.Texture0);
GL.Uniform1( uniforms.map, 0 );
var oldFogType = 0;
var sceneFogType = 0;
var fog = scene.Fog;
if (fog != null)
{
GL.Uniform3(uniforms.fogColor, scene.Fog.Color.R, scene.Fog.Color.G, scene.Fog.Color.B);
var linear = fog as FogLinear;
var exp2 = fog as FogExp2;
if (linear != null)
{
GL.Uniform1( uniforms.fogNear, linear.Near);
GL.Uniform1( uniforms.fogFar, linear.Far);
GL.Uniform1( uniforms.fogType, 1 );
oldFogType = 1;
sceneFogType = 1;
}
else if ( exp2 != null)
{
GL.Uniform1( uniforms.fogDensity, exp2.Density);
GL.Uniform1( uniforms.fogType, 2 );
oldFogType = 2;
sceneFogType = 2;
}
}
else
{
GL.Uniform1( uniforms.fogType, 0 );
oldFogType = 0;
sceneFogType = 0;
}
// update positions and sort
foreach( var sprite in sprites)
{
var material = sprite.Material;
sprite.modelViewMatrix.MultiplyMatrices( camera.matrixWorldInverse, sprite.matrixWorld );
sprite.Zdepth = -sprite.modelViewMatrix.elements[ 14 ];
}
sprites.Sort( PainterSortStable );
// render all sprites
foreach( var sprite in sprites)
{
var material = sprite.Material as SpriteMaterial;
GL.Uniform1( uniforms.alphaTest, material.ShouldAlphaTest);
GL.UniformMatrix4( (int)uniforms.modelViewMatrix, 16, false, sprite.modelViewMatrix.elements );
var fogType = 0;
if ( scene.Fog != null && material.UseFog) fogType = sceneFogType;
if ( oldFogType != fogType )
{
GL.Uniform1( uniforms.fogType, fogType );
oldFogType = fogType;
}
if ( material.DiffuseMap != null )
{
GL.Uniform2(uniforms.uvOffset, material.DiffuseMap.Offset.x, material.DiffuseMap.Offset.y);
GL.Uniform2(uniforms.uvScale, material.DiffuseMap.Repeat.x, material.DiffuseMap.Repeat.y);
}
else
{
GL.Uniform2( uniforms.uvOffset, 0, 0 );
GL.Uniform2( uniforms.uvScale, 1, 1 );
}
GL.Uniform1( uniforms.opacity, material.Opacity );
GL.Uniform3(uniforms.color, material.Diffuse.R, material.Diffuse.G, material.Diffuse.B);
GL.Uniform1( uniforms.rotation, material.Rotation);
GL.Uniform2( uniforms.scale, sprite.Scale.x, sprite.Scale.y);
renderer.SetBlending( material.Blending, material.BlendEquation, material.BlendSource, material.BlendDestination);
renderer.DepthTest = material.ShouldDepthTest;
renderer.DepthWrite = material.ShouldDepthWrite;
if ( material.DiffuseMap != null && material.DiffuseMap.Resolution.Width > 0) renderer.SetTexture( material.DiffuseMap, 0 );
else renderer.SetTexture(texture, 0 );
GL.DrawElements( BeginMode.TriangleFan, 6, DrawElementsType.UnsignedShort, 0 );
}
// restore gl
GL.Enable( EnableCap.CullFace);
}