public void RenderToDepth(System.Numerics.Vector3 LightPos)
{
GL.Viewport(0, 0, SHADOW_WIDTH, SHADOW_HEIGHT);
var aspect = (float)SHADOW_WIDTH / SHADOW_HEIGHT;
GL.BindFramebuffer(FramebufferTarget.Framebuffer, DepthMapFBO);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
var near = 1.0f;
var far = 25.0f;
Matrix4 shadProj = Matrix4.CreatePerspectiveFieldOfView(
GLHelper.DegRad(90.0f), aspect, near, far); // THIS NEEDS TO BE 90! I might make it a var anyway for shits and giggles
List <Matrix4> Transforms = new();
Vector3 right = new(1.0f, 0.0f, 0.0f);
Vector3 left = new(-1.0f, 0.0f, 0.0f);
Vector3 up = new(0.0f, 1.0f, 0.0f);
Vector3 down = new(0.0f, -1.0f, 0.0f);
Vector3 forward = new(0.0f, 0.0f, 1.0f);
Vector3 back = new(0.0f, 0.0f, -1.0f);
var lptk = LightPos.ToOpenTK();
Transforms.Add(
shadProj * Matrix4.LookAt(
lptk, lptk + right, down));
Transforms.Add(
shadProj * Matrix4.LookAt(
lptk, lptk + left, down));
Transforms.Add(
shadProj * Matrix4.LookAt(
lptk, lptk + up, forward));
Transforms.Add(
shadProj * Matrix4.LookAt(
lptk, lptk + down, back));
Transforms.Add(
shadProj * Matrix4.LookAt(
lptk, lptk + forward, down));
Transforms.Add(
shadProj * Matrix4.LookAt(
lptk, lptk + back, down));
GL.BindTexture(TextureTarget.TextureCubeMap, Cubemap);
ECSScene.ExplicitRender();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
}
