/// <summary></summary>
/// <param name="state"></param>
/// <param name="repeat"></param>
/// <param name="camera"></param>
/// <returns></returns>
internal override bool BeginRepeat(DrawState state, int repeat, ref ICamera camera)
{
if (isDisposed)
throw new ObjectDisposedException("this");
GraphicsDevice device = state.graphics;
if (!facesEnabled[repeat])
return false;
#if XBOX360
state.nonScreenRenderComplete = true;
#endif
if (repeat == minFaceEnabled)
{
if (texture == null)
{
Warm(state);
}
if (texture.IsDisposed)
throw new ObjectDisposedException("RenderTexture");
state.shaderSystem.ResetTextures();
}
device.SetRenderTarget(texture, (CubeMapFace)repeat);
if (cubeCamera == null)
cubeCamera = new Camera3D(new Projection(MathHelper.PiOver2,1,100,1));
if (repeat == minFaceEnabled)
{
camera.GetCameraMatrix(out cubeCameraMatrix);
if (camera is Camera3D)
{
this.cubeCamera.Projection.NearClip = ((Camera3D)camera).Projection.NearClip;
this.cubeCamera.Projection.FarClip = ((Camera3D)camera).Projection.FarClip;
this.cubeCamera.Projection.UseLeftHandedProjection = true;// ((Camera3D)camera).Projection.UseLeftHandedProjection;
this.cubeCamera.ReverseBackfaceCulling = true;
}
else
{
this.cubeCamera.Projection.NearClip = 1;
this.cubeCamera.Projection.FarClip = 100;
this.cubeCamera.Projection.UseLeftHandedProjection = false;
}
}
Matrix view;
Matrix.Multiply(ref CubeMapFaceMatrices[repeat], ref cubeCameraMatrix, out view);
this.cubeCamera.SetCameraMatrix(ref view);
camera = this.cubeCamera;
return true;
}
//also used by Camera2D
internal static void ProjectFromCoordinate(ICamera camera, bool is2D, ref Vector2 screenPosition, float projectDepth, out Vector3 position, ref Vector2 targetSize)
{
Vector4 coordinate = new Vector4(0, 0, 0.5f, 1);
if (targetSize.X != 0)
coordinate.X = ((screenPosition.X / targetSize.X) - 0.5f) * 2;
if (targetSize.Y != 0)
coordinate.Y = ((screenPosition.Y / targetSize.Y) - 0.5f) * 2;
//this is much slower for 3D Cameras than 2D, due to matrix inversion requirements.
Matrix mat;
if (is2D)
{
//projection is always identity, so only need the inverse of the view matrix...
//which is the camera matrix
camera.GetCameraMatrix(out mat);
}
else
{
//more complex.
Matrix pm;
camera.GetProjectionMatrix(out pm, ref targetSize);
camera.GetViewMatrix(out mat);
// OUCH
Matrix.Multiply(ref mat, ref pm, out mat);
Matrix.Invert(ref mat, out mat);
}
Vector4.Transform(ref coordinate, ref mat, out coordinate);
if (coordinate.W != 0)
{
coordinate.W = 1.0f / coordinate.W;
coordinate.X *= coordinate.W;
coordinate.Y *= coordinate.W;
coordinate.Z *= coordinate.W;
coordinate.W = 1;
}
//this could probably be done better...
Vector3 cameraPos;
camera.GetCameraPosition(out cameraPos);
Vector3 difference = new Vector3();
difference.X = coordinate.X - cameraPos.X;
difference.Y = coordinate.Y - cameraPos.Y;
difference.Z = coordinate.Z - cameraPos.Z;
if (difference.X != 0 || difference.Y != 0 || difference.Y != 0)
difference.Normalize();
difference.X *= projectDepth;
difference.Y *= projectDepth;
difference.Z *= projectDepth;
position = new Vector3();
position.X = difference.X + cameraPos.X;
position.Y = difference.Y + cameraPos.Y;
position.Z = difference.Z + cameraPos.Z;
}
internal static void ProjectFromCoordinate(ICamera camera, bool is2D, ref Vector2 screenPosition, float projectDepth, out Vector3 position, ref Vector2 targetSize)
{
Vector4 coordinate = new Vector4(0, 0, 0.5f, 1);
if (targetSize.X != 0)
coordinate.X = ((screenPosition.X / targetSize.X) - 0.5f) * 2;
if (targetSize.Y != 0)
coordinate.Y = ((screenPosition.Y / targetSize.Y) - 0.5f) * 2;
Matrix mat;
if (is2D)
{
camera.GetCameraMatrix(out mat);
}
else
{
Matrix pm;
camera.GetProjectionMatrix(out pm, ref targetSize);
camera.GetViewMatrix(out mat);
Matrix.Multiply(ref mat, ref pm, out mat);
Matrix.Invert(ref mat, out mat);
}
Vector4.Transform(ref coordinate, ref mat, out coordinate);
if (coordinate.W != 0)
{
coordinate.W = 1.0f / coordinate.W;
coordinate.X *= coordinate.W;
coordinate.Y *= coordinate.W;
coordinate.Z *= coordinate.W;
coordinate.W = 1;
}
Vector3 cameraPos;
camera.GetCameraPosition(out cameraPos);
Vector3 difference = new Vector3();
difference.X = coordinate.X - cameraPos.X;
difference.Y = coordinate.Y - cameraPos.Y;
difference.Z = coordinate.Z - cameraPos.Z;
if (difference.X != 0 || difference.Y != 0 || difference.Y != 0)
difference.Normalize();
difference.X *= projectDepth;
difference.Y *= projectDepth;
difference.Z *= projectDepth;
position = new Vector3();
position.X = difference.X + cameraPos.X;
position.Y = difference.Y + cameraPos.Y;
position.Z = difference.Z + cameraPos.Z;
}
//also used by Camera2D
internal static void ProjectFromCoordinate(ICamera camera, bool is2D, ref Vector2 screenPosition, float projectDepth, out Vector3 position, ref Vector2 targetSize)
{
Vector4 coordinate = new Vector4(0, 0, 0.5f, 1);
if (targetSize.X != 0)
{
coordinate.X = ((screenPosition.X / targetSize.X) - 0.5f) * 2;
}
if (targetSize.Y != 0)
{
coordinate.Y = ((screenPosition.Y / targetSize.Y) - 0.5f) * 2;
}
//this is much slower for 3D Cameras than 2D, due to matrix inversion requirements.
Matrix mat;
if (is2D)
{
//projection is always identity, so only need the inverse of the view matrix...
//which is the camera matrix
camera.GetCameraMatrix(out mat);
}
else
{
//more complex.
Matrix pm;
camera.GetProjectionMatrix(out pm, ref targetSize);
camera.GetViewMatrix(out mat);
// OUCH
Matrix.Multiply(ref mat, ref pm, out mat);
Matrix.Invert(ref mat, out mat);
}
Vector4.Transform(ref coordinate, ref mat, out coordinate);
if (coordinate.W != 0)
{
coordinate.W = 1.0f / coordinate.W;
coordinate.X *= coordinate.W;
coordinate.Y *= coordinate.W;
coordinate.Z *= coordinate.W;
coordinate.W = 1;
}
//this could probably be done better...
Vector3 cameraPos;
camera.GetCameraPosition(out cameraPos);
Vector3 difference = new Vector3();
difference.X = coordinate.X - cameraPos.X;
difference.Y = coordinate.Y - cameraPos.Y;
difference.Z = coordinate.Z - cameraPos.Z;
if (difference.X != 0 || difference.Y != 0 || difference.Y != 0)
{
difference.Normalize();
}
difference.X *= projectDepth;
difference.Y *= projectDepth;
difference.Z *= projectDepth;
position = new Vector3();
position.X = difference.X + cameraPos.X;
position.Y = difference.Y + cameraPos.Y;
position.Z = difference.Z + cameraPos.Z;
}
internal static void ProjectFromCoordinate(ICamera camera, bool is2D, ref Vector2 screenPosition, float projectDepth, out Vector3 position, ref Vector2 targetSize)
{
Vector4 coordinate = new Vector4(0, 0, 0.5f, 1);
if (targetSize.X != 0)
{
coordinate.X = ((screenPosition.X / targetSize.X) - 0.5f) * 2;
}
if (targetSize.Y != 0)
{
coordinate.Y = ((screenPosition.Y / targetSize.Y) - 0.5f) * 2;
}
Matrix mat;
if (is2D)
{
camera.GetCameraMatrix(out mat);
}
else
{
Matrix pm;
camera.GetProjectionMatrix(out pm, ref targetSize);
camera.GetViewMatrix(out mat);
Matrix.Multiply(ref mat, ref pm, out mat);
Matrix.Invert(ref mat, out mat);
}
Vector4.Transform(ref coordinate, ref mat, out coordinate);
if (coordinate.W != 0)
{
coordinate.W = 1.0f / coordinate.W;
coordinate.X *= coordinate.W;
coordinate.Y *= coordinate.W;
coordinate.Z *= coordinate.W;
coordinate.W = 1;
}
Vector3 cameraPos;
camera.GetCameraPosition(out cameraPos);
Vector3 difference = new Vector3();
difference.X = coordinate.X - cameraPos.X;
difference.Y = coordinate.Y - cameraPos.Y;
difference.Z = coordinate.Z - cameraPos.Z;
if (difference.X != 0 || difference.Y != 0 || difference.Y != 0)
{
difference.Normalize();
}
difference.X *= projectDepth;
difference.Y *= projectDepth;
difference.Z *= projectDepth;
position = new Vector3();
position.X = difference.X + cameraPos.X;
position.Y = difference.Y + cameraPos.Y;
position.Z = difference.Z + cameraPos.Z;
}