Elevate::Frustum Struct Reference

#include <Frustum.h>

Public Member Functions
	Frustum ()=default
	Frustum (Camera &camera)

Public Attributes
Plane	planes [6]

Detailed Description

Definition at line 34 of file Frustum.h.

Constructor & Destructor Documentation

Frustum() [1/2]

Elevate::Frustum::Frustum ( )

default

Frustum() [2/2]

Elevate::Frustum::Frustum

(

Camera &

camera

)

Definition at line 9 of file Frustum.cpp.

    {
        float zFar = cam.GetFar();
        float zNear = cam.GetNear();
        float aspectRatio = cam.GetAspectRatio();
        float fov = cam.GetFOV();
 
        glm::vec3 front = cam.GetFrontVec();
        glm::vec3 right = cam.GetRightVec();
        glm::vec3 up = cam.GetUpVec();
        glm::vec3 position = cam.gameObject->GetPosition();
 
        float tanFovHalf = tan(fov / 2.0f);
 
        float nearHeight = 2.0f * tanFovHalf * zNear;
        float nearWidth = nearHeight * aspectRatio;
        float farHeight = 2.0f * tanFovHalf * zFar;
        float farWidth = farHeight * aspectRatio;
 
        glm::vec3 nearCenter = position + front * zNear;
        glm::vec3 farCenter = position + front * zFar;
 
        const glm::vec3 nearTopLeft = nearCenter + up * (nearHeight * 0.5f) - right * (nearWidth * 0.5f);
        const glm::vec3 nearTopRight = nearCenter + up * (nearHeight * 0.5f) + right * (nearWidth * 0.5f);
        const glm::vec3 nearBottomLeft = nearCenter - up * (nearHeight * 0.5f) - right * (nearWidth * 0.5f);
        const glm::vec3 nearBottomRight = nearCenter - up * (nearHeight * 0.5f) + right * (nearWidth * 0.5f);
 
        const glm::vec3 farTopLeft = farCenter + up * (farHeight * 0.5f) - right * (farWidth * 0.5f);
        const glm::vec3 farTopRight = farCenter + up * (farHeight * 0.5f) + right * (farWidth * 0.5f);
        const glm::vec3 farBottomLeft = farCenter - up * (farHeight * 0.5f) - right * (farWidth * 0.5f);
        const glm::vec3 farBottomRight = farCenter - up * (farHeight * 0.5f) + right * (farWidth * 0.5f);
 
        planes[FrustumPlane::NEAR_PLANE].Set(front, nearCenter);
        planes[FrustumPlane::FAR_PLANE].Set(-front, farCenter);
        planes[FrustumPlane::TOP_PLANE].Set(glm::cross(nearTopRight - position, farTopLeft - position), nearTopLeft);
        planes[FrustumPlane::BOTTOM_PLANE].Set(glm::cross(farBottomLeft - position, nearBottomRight - position), nearBottomLeft);
        planes[FrustumPlane::LEFT_PLANE].Set(glm::cross(nearBottomLeft - position, farTopLeft - position), nearBottomLeft);
        planes[FrustumPlane::RIGHT_PLANE].Set(glm::cross(farTopRight - position, nearBottomRight - position), nearBottomRight);
    }

Member Data Documentation

planes

Plane Elevate::Frustum::planes[6]

Definition at line 39 of file Frustum.h.

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The documentation for this struct was generated from the following files:

• ElevateEngine/src/ElevateEngine/Renderer/Camera/Frustum.h
• ElevateEngine/src/ElevateEngine/Renderer/Camera/Frustum.cpp