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72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/******************************************************************************
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* File - orthographic_camera.cpp
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* Author - Joey Pollack
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* Date - 2022/01/25 (y/m/d)
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* Mod Date - 2022/01/25 (y/m/d)
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* Description - A 2D camera to be used with the World
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******************************************************************************/
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#include "orthographic_camera.h"
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#include <glm/gtc/matrix_transform.hpp>
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namespace lunarium
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{
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OrthographicCamera::OrthographicCamera(Vec2f position, Sizef viewport_size)
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: mPosition(position), mRotation(0.0f), mViewportSize(viewport_size), mView(1.0f)
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{
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RecalculateView();
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}
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void OrthographicCamera::MoveLeft(float amt)
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{
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mPosition.X += amt;
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RecalculateView();
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}
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void OrthographicCamera::MoveUp(float amt)
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{
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mPosition.Y += amt;
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RecalculateView();
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}
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void OrthographicCamera::Rotate(float amt)
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{
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mRotation += amt;
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RecalculateView();
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}
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void OrthographicCamera::SetPosition(Vec2f position)
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{
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mPosition = position;
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RecalculateView();
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}
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void OrthographicCamera::SetRotation(float rot)
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{
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mRotation = rot;
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RecalculateView();
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}
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glm::mat4 OrthographicCamera::GetViewProjection()
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{
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return mViewProj;
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}
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void OrthographicCamera::SetViewportSize(Sizef size)
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{
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mViewportSize = size;
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RecalculateView();
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}
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void OrthographicCamera::RecalculateView()
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{
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mProjection = glm::ortho(0.0f, mViewportSize.Width, mViewportSize.Height, 0.0f, -1.0f, 1.0f);
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glm::mat4 transform = glm::translate(glm::mat4(1.0f), (glm::vec3)mPosition);
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transform *= glm::rotate(glm::mat4(1.0f), glm::radians(mRotation), glm::vec3(0, 0, 1));
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mView = glm::inverse(transform);
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mViewProj = mProjection * mView;
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}
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} |