public static Mesh generateTextureQuad()
{
VertexAttributes attrs = new VertexAttributes(VertexAttribute.Position(), VertexAttribute.TexCoords(0));
Mesh mesh = new Mesh(true, 4, 5, attrs);
mesh.setVerticies(ref quadTextureVerts);
mesh.setIndicies(ref quadTextureIndencies);
return(mesh);
}
private int calculateOffsets()
{
int count = 0;
for (int i = 0; i < this.attributes.Length; i++)
{
VertexAttribute attr = this.attributes[i];
attr.offset = count;
count += 4 * attr.numComponents;
}
return(count);
}
public void unbind(ref Shader shader)
{
for (int i = 0; i < attributes.size(); i++)
{
VertexAttribute attr = attributes.get(i);
int location = shader.attribute(attr.alias);
GL.DisableVertexAttribArray(location);
}
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
}
public void bind(ref Shader shader)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, bufferHandle);
if (dirty)
{
bufferChange();
dirty = false;
}
for (int i = 0; i < attributes.size(); i++)
{
VertexAttribute attr = attributes.get(i);
int location = shader.attribute(attr.alias);
GL.EnableVertexAttribArray(location);
GL.VertexAttribPointer(location, attr.numComponents, VertexAttribPointerType.Float, false, attributes.vertexSize, attr.offset);
}
}
public static Mesh screenQuad(ref Camera camera, int textureUnit)
{
VertexAttributes attrs = new VertexAttributes(VertexAttribute.Position(), VertexAttribute.TexCoords(textureUnit));
Mesh mesh = new Mesh(true, 4, 5, attrs);
Vector3 vec0 = Vector3.Zero;
camera.unproject(ref vec0);
Vector3 vec1 = new Vector3(Game.shared.width, Game.shared.height, 0);
camera.unproject(ref vec1);
mesh.setVertices(new float[] {
vec0.X, vec0.Y, 0, 0, 1,
vec1.X, vec0.Y, 0, 1, 1,
vec1.X, vec1.Y, 0, 1, 0,
vec0.X, vec1.Y, 0, 0, 0
});
mesh.setIndices(new uint[] { 0, 1, 2, 2, 3, 0 });
return(mesh);
}