42 lines
1.6 KiB
C++
42 lines
1.6 KiB
C++
//
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// Created by dawsh on 1/25/24.
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//
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#pragma once
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#include "Plane.h"
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#include <J3ML/LinearAlgebra/CoordinateFrame.h>
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namespace J3ML::Geometry
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{
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using J3ML::LinearAlgebra::CoordinateFrame;
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enum class FrustumType
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{
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Invalid,
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/// Set the Frustum type to this value to define the orthographic projection formula. In orthographic projection,
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/// 3D images are projected onto a 2D plane essentially by flattening the object along one direction (the plane normal).
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/// The size of the projected images appear the same independent of their distance to the camera, and distant objects will
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/// not appear smaller. The shape of the Frustum is identical to an oriented bounding box (OBB).
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Orthographic,
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/// Set the Frustum type to this value to use the perspective projection formula. With perspective projection, the 2D
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/// image is formed by projecting 3D points towards a single point (the eye point/tip) of the Frustum, and computing the
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/// point of intersection of the line of the projection and the near plane of the Frustum.
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/// This corresponds to the optics in the real-world, and objects become smaller as they move to the distance.
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/// The shape of the Frustum is a rectangular pyramid capped from the tip.
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Perspective
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};
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class Frustum {
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public:
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Plane TopFace;
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Plane BottomFace;
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Plane RightFace;
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Plane LeftFace;
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Plane FarFace;
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Plane NearFace;
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static Frustum CreateFrustumFromCamera(const CoordinateFrame& cam, float aspect, float fovY, float zNear, float zFar);
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};
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} |