private void DrawPrimitives()
{
// Clears the screen with the Color.CornflowerBlue
GraphicsDevice.Clear(GraphicsDevice.DepthStencilBuffer, DepthStencilClearOptions.DepthBuffer | DepthStencilClearOptions.Stencil);
GraphicsDevice.Clear(GraphicsDevice.BackBuffer, Color.CornflowerBlue);
GraphicsDevice.SetRenderTarget(GraphicsDevice.DepthStencilBuffer, GraphicsDevice.BackBuffer);
// Render each primitive
for (int i = 0; i < primitives.Count; i++)
{
var primitive = primitives[i];
// Calculate the translation
float dx = ((i + 1) % 4);
float dy = ((i + 1) / 4);
float x = (dx - 1.5f) * 1.7f;
float y = 1.0f - 2.0f * dy;
var time = timeSeconds + i;
// Setup the World matrice for this primitive
var world = Matrix.Scaling((float)Math.Sin(time * 1.5f) * 0.2f + 1.0f) * Matrix.RotationX(time) * Matrix.RotationY(time * 2.0f) * Matrix.RotationZ(time * .7f) * Matrix.Translation(x, y, 0);
//var world = Matrix.Translation(x, y, 0);
// Disable Cull only for the plane primitive, otherwise use standard culling
GraphicsDevice.SetRasterizerState(i == 0 ? GraphicsDevice.RasterizerStates.CullNone : GraphicsDevice.RasterizerStates.CullBack);
// Draw the primitive using BasicEffect
simpleEffect.Transform = Matrix.Multiply(world, Matrix.Multiply(view, projection));
simpleEffect.Apply();
primitive.Draw();
}
}
private void DrawTextureSampling()
{
// Clears the screen
GraphicsDevice.Clear(GraphicsDevice.BackBuffer, Color.LightBlue);
GraphicsDevice.Clear(GraphicsDevice.DepthStencilBuffer, DepthStencilClearOptions.DepthBuffer | DepthStencilClearOptions.Stencil);
GraphicsDevice.SetRenderTarget(GraphicsDevice.DepthStencilBuffer, GraphicsDevice.BackBuffer);
GraphicsDevice.SetRasterizerState(GraphicsDevice.RasterizerStates.CullNone);
GraphicsDevice.SetVertexArrayObject(vao);
for (var i = 0; i < myDraws.Length; ++i)
{
simpleEffect.Sampler = myDraws[i].Sampler;
simpleEffect.Transform = myDraws[i].Transform;
simpleEffect.Apply();
GraphicsDevice.DrawIndexed(PrimitiveType.TriangleList, 6);
}
GraphicsDevice.SetVertexArrayObject(null);
}
private void DrawGeometry()
{
simpleEffect.Transform = worldViewProjection;
simpleEffect.Apply();
geometry.Draw();
}
