public void RecalculateMatrices()
{
CameraState CamState = Animation.GetCameraState();
float AspectRatio = (float)Renderer.Width / Renderer.Height;
if (BaseCamera != null)
{
Matrix4 Transform =
Matrix4.CreateScale(CamState.Scale) *
Matrix4.CreateRotationX(CamState.Rotation.X) *
Matrix4.CreateRotationY(CamState.Rotation.Y) *
Matrix4.CreateRotationZ(CamState.Rotation.Z) *
Matrix4.CreateTranslation(CamState.Translation);
Vector3 Eye = Transform.Row3.Xyz;
if (BaseCamera.View is H3DCameraViewLookAt LookAtView)
{
Vector3 Up = CamState.UpVector;
Vector3 Target = CamState.Target;
if ((BaseCamera.Flags & H3DCameraFlags.IsInheritingUpRotation) != 0)
{
Up = Vector3.Transform(new Matrix3(Transform), Up);
}
if ((BaseCamera.Flags & H3DCameraFlags.IsInheritingTargetRotation) != 0)
{
Target = Vector3.Transform(new Matrix3(Transform), Target);
}
if ((BaseCamera.Flags & H3DCameraFlags.IsInheritingTargetTranslation) != 0)
{
Target += Eye;
}
ViewMatrix = Matrix4.LookAt(Eye, Target, Up);
}
else if (BaseCamera.View is H3DCameraViewAim AimView)
{
Vector3 Target = CamState.Target;
Vector3 EyeDir = Vector3.Normalize(Eye - Target);
Vector3 Twist = Vector3.Normalize(new Vector3(EyeDir.Z, 0, -EyeDir.X));
Vector3 Cross = Vector3.Cross(EyeDir, Twist);
float ST = (float)Math.Sin(CamState.Twist);
float CT = (float)Math.Cos(CamState.Twist);
Vector3 Up = new Vector3(
Cross.X * CT - Twist.X * ST,
Cross.Y * CT - Twist.Y * ST,
Cross.Z * CT - Twist.Z * ST);
if ((BaseCamera.Flags & H3DCameraFlags.IsInheritingTargetRotation) != 0)
{
Up = Vector3.Transform(new Matrix3(Transform), Up);
Target = Vector3.Transform(new Matrix3(Transform), Target);
}
if ((BaseCamera.Flags & H3DCameraFlags.IsInheritingTargetTranslation) != 0)
{
Target += Eye;
}
}
else if (BaseCamera.View is H3DCameraViewRotation RotView)
{
Matrix3 Rotation =
Matrix3.CreateRotationZ(CamState.ViewRotation.Z) *
Matrix3.CreateRotationX(CamState.ViewRotation.X) *
Matrix3.CreateRotationY(CamState.ViewRotation.Y);
Vector3 Up = Vector3.UnitY;
Vector3 Target = Vector3.Transform(Rotation, new Vector3(0, 0, -1));
if ((BaseCamera.Flags & H3DCameraFlags.IsInheritingTargetRotation) != 0)
{
Up = Vector3.Transform(new Matrix3(Transform), Up);
Target = Vector3.Transform(new Matrix3(Transform), Target);
}
Target += Eye;
ViewMatrix = Matrix4.LookAt(Eye, Target, Up);
}
if (BaseCamera.Projection is H3DCameraProjectionPerspective PerspProj)
{
ProjectionMatrix = Matrix4.CreatePerspectiveFieldOfView(
PerspProj.FOVY,
AspectRatio,
CamState.ZNear,
CamState.ZFar);
}
else if (BaseCamera.Projection is H3DCameraProjectionOrthogonal OrthoProj)
{
ProjectionMatrix = Matrix4.CreateOrthographic(
Renderer.Width,
Renderer.Height,
CamState.ZNear,
CamState.ZFar);
}
}
else
{
ViewMatrix = Matrix4.Identity;
ProjectionMatrix = Matrix4.CreatePerspectiveFieldOfView(
(float)Math.PI * 0.25f,
AspectRatio,
0.25f,
100000f);
}
}