//No function in monogame to draw without vb it seems...
/*
* struct VertexShaderInput
* {
* float2 Position : POSITION0;
* };
*
* VertexShaderOutput VertexShaderFunction(VertexShaderInput input, uint id:SV_VERTEXID)
* {
* VertexShaderOutput output;
* output.Position = float4(input.Position, 0, 1);
* output.TexCoord.x = (float)(id / 2) * 2.0;
* output.TexCoord.y = 1.0 - (float)(id % 2) * 2.0;
*
* return output;
* }
*
*/
public FullScreenTriangle(GraphicsDevice graphics)
{
FullScreenQuadVertex[] vertices = new FullScreenQuadVertex[3];
vertices[0] = new FullScreenQuadVertex(new Vector2(-1, -1));
vertices[1] = new FullScreenQuadVertex(new Vector2(-1, 3));
vertices[2] = new FullScreenQuadVertex(new Vector2(3, -1));
vertexBuffer = new VertexBuffer(graphics, FullScreenQuadVertex.VertexDeclaration, 3, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
}
public FullScreenQuadRenderer(GraphicsDevice graphics)
{
FullScreenQuadVertex[] vertexBufferTemp = new FullScreenQuadVertex[4];
vertexBufferTemp[0] = new FullScreenQuadVertex(new Vector2(-1, 1));
vertexBufferTemp[1] = new FullScreenQuadVertex(new Vector2(1, 1));
vertexBufferTemp[2] = new FullScreenQuadVertex(new Vector2(-1, -1));
vertexBufferTemp[3] = new FullScreenQuadVertex(new Vector2(1, -1));
short[] indexBufferTemp = new short[] { 0, 3, 2, 0, 1, 3 };
_vertexBuffer = new VertexBuffer(graphics, FullScreenQuadVertex.VertexDeclaration, 4, BufferUsage.WriteOnly);
_indexBuffer = new IndexBuffer(graphics, IndexElementSize.SixteenBits, 6, BufferUsage.WriteOnly);
_vertexBuffer.SetData(vertexBufferTemp);
_indexBuffer.SetData(indexBufferTemp);
}
