Add FRUSTUM camera mode, allowing tilted frustums

This new camera mode makes it easy to create tilted frustums for mirror
or portal effects.

This work was kindly sponsored by IMVU.

1 files changed, 7 insertions, 1 deletions

diff --git a/scene/3d/camera.h b/scene/3d/camera.h
index a531324a85..fe8cb84f0d 100644
--- a/scene/3d/camera.h
+++ b/scene/3d/camera.h
@@ -46,7 +46,8 @@ public:
 	enum Projection {
 
 		PROJECTION_PERSPECTIVE,
-		PROJECTION_ORTHOGONAL
+		PROJECTION_ORTHOGONAL,
+		PROJECTION_FRUSTUM
 	};
 
 	enum KeepAspect {
@@ -68,6 +69,7 @@ private:
 
 	float fov;
 	float size;
+	Vector2 frustum_offset;
 	float near, far;
 	float v_offset;
 	float h_offset;
@@ -110,6 +112,7 @@ public:
 
 	void set_perspective(float p_fovy_degrees, float p_z_near, float p_z_far);
 	void set_orthogonal(float p_size, float p_z_near, float p_z_far);
+	void set_frustum(float p_size, Vector2 p_offset, float p_near, float p_far);
 	void set_projection(Camera::Projection p_mode);
 
 	void make_current();
@@ -123,12 +126,15 @@ public:
 	float get_size() const;
 	float get_zfar() const;
 	float get_znear() const;
+	Vector2 get_frustum_offset() const;
+
 	Projection get_projection() const;
 
 	void set_fov(float p_fov);
 	void set_size(float p_size);
 	void set_zfar(float p_zfar);
 	void set_znear(float p_znear);
+	void set_frustum_offset(Vector2 p_offset);
 
 	virtual Transform get_camera_transform() const;