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Separated Camera code into own file and got it working

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This commit is contained in:
NaifBanana 2024-11-21 00:43:45 -06:00
parent 45dc9d42be
commit d75f449538
9 changed files with 226 additions and 177 deletions
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2
CMakeLists.txt
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@ -39,6 +39,6 @@ set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
set(NBGL_BUILD_TEST ON)
add_executable(GraphicsTest main.cpp funcs.cpp Draw.cpp Shader.cpp Buffers.cpp ../libs/glad/src/glad.c)
add_executable(GraphicsTest main.cpp funcs.cpp Draw.cpp Shader.cpp Buffers.cpp Camera.cpp ../libs/glad/src/glad.c)
target_link_libraries(GraphicsTest NBWindow glfw OpenGL::GL)

114
Camera.cpp Normal file
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@ -0,0 +1,114 @@
#include "Camera.h"
namespace NB {
// Camera class
Camera::Camera(const Vec3& pos, const Vec3& tar, const Vec3& up) : _camera_type(CameraType::None) {
_pos = pos;
_tar = tar;
_world_up = glm::normalize(up);
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_proj = glm::ortho(-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f);
_calcLook();
}
void Camera::_calcLook() {
_look = glm::lookAt(_pos, _tar, _world_up);
}
glm::vec3 Camera::normCross(const Vec3& a, const Vec3& b) {
return glm::normalize(glm::cross(a, b));
}
glm::vec3 Camera::getPos() const { return _pos; }
glm::vec3 Camera::getTarget() const { return _tar; }
glm::vec3 Camera::getDirection() const { return _dir; }
glm::vec3 Camera::getWorldUp() const { return _world_up; }
glm::vec3 Camera::getUp() const { return _up; }
glm::vec3 Camera::getRight() const { return _right; }
glm::mat4 Camera::getLookMatrix() const { return _look; }
glm::mat4 Camera::getProjectionMatrix() const { return _proj; }
glm::mat4 Camera::getFlattenedMatrices() const { return _proj * _look; }
void Camera::setProjection(const Mat4& proj) {
_proj = proj;
}
void Camera::setPos(const Vec3& pos) {
_pos = pos;
_calcLook();
}
void Camera::setTarget(const Vec3& tar) {
_tar = tar;
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::setDirection(const Vec3& dir) {
setTarget(glm::normalize(dir)+_pos);
}
void Camera::setWorldUp(const Vec3& up) {
_world_up = up;
_right = normCross(_dir, _up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::addPos(const Vec3& add) {
_pos += add;
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::panPos(const Vec3& add) {
_tar += add;
addPos(add);
}
void Camera::panPosRelative(const Vec3& add) {
panPos(add.x*_right + add.y*_up + add.z*_dir);
}
void Camera::addTarget(const Vec3& add) {
_tar += add;
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::roll(float ang) {
}
void Camera::pitch(float ang) {
Mat4 rot_mat = glm::rotate(Mat4(1.0f), ang, _right);
_dir = Vec3(rot_mat * glm::vec4(_dir, 1.0f));
_tar = _pos + _dir;
_calcLook();
}
void Camera::yaw(float ang) {
Mat4 rot_mat = glm::rotate(Mat4(1.0f), ang, _up);
_dir = Vec3(rot_mat * glm::vec4(_dir, 1.0f));
_right = Vec3(rot_mat * glm::vec4(_right, 1.0f));
_tar = _pos + _dir;
_calcLook();
}
}

106
Draw.cpp
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@ -307,110 +307,4 @@ void DrawInstanceBuffer::draw() const {
_VAO.unbind();
}
// Camera class
Camera::Camera(const Vec3& pos, const Vec3& tar, const Vec3& up) : _camera_type(CameraType::None) {
_pos = pos;
_tar = tar;
_world_up = glm::normalize(up);
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_proj = glm::ortho(-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f);
_calcLook();
}
void Camera::_calcLook() {
_look = glm::lookAt(_pos, _tar, _world_up);
}
glm::vec3 Camera::normCross(const Vec3& a, const Vec3& b) {
return glm::normalize(glm::cross(a, b));
}
glm::vec3 Camera::getPos() const { return _pos; }
glm::vec3 Camera::getTarget() const { return _tar; }
glm::vec3 Camera::getDirection() const { return _dir; }
glm::vec3 Camera::getWorldUp() const { return _world_up; }
glm::vec3 Camera::getUp() const { return _up; }
glm::vec3 Camera::getRight() const { return _right; }
glm::mat4 Camera::getLookMatrix() const { return _look; }
glm::mat4 Camera::getProjectionMatrix() const { return _proj; }
glm::mat4 Camera::getFlattenedMatrices() const { return _proj * _look; }
void Camera::setProjection(const Mat4& proj) {
_proj = proj;
}
void Camera::setPos(const Vec3& pos) {
_pos = pos;
_calcLook();
}
void Camera::setTarget(const Vec3& tar) {
_tar = tar;
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::setDirection(const Vec3& dir) {
setTarget(glm::normalize(dir)+_pos);
}
void Camera::setWorldUp(const Vec3& up) {
_world_up = up;
_right = normCross(_dir, _up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::addPos(const Vec3& add) {
_pos += add;
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::panPos(const Vec3& add) {
_tar += add;
addPos(add);
}
void Camera::addTarget(const Vec3& add) {
_tar += add;
_dir = glm::normalize(_tar-_pos);
_right = normCross(_dir, _world_up);
_up = normCross(_right, _dir);
_calcLook();
}
void Camera::roll(float ang) {
}
void Camera::pitch(float ang) {
Mat4 rot_mat = glm::rotate(_look, ang, _right);
_dir = Vec3(rot_mat * glm::vec4(_dir, 1.0f));
_tar = _pos + _dir;
_calcLook();
}
void Camera::yaw(float ang) {
Mat4 rot_mat = glm::rotate(_look, ang, _up);
_dir = Vec3(rot_mat * glm::vec4(_dir, 1.0f));
_right = Vec3(rot_mat * glm::vec4(_right, 1.0f));
_tar = _pos + _dir;
_calcLook();
}
}

27
funcs.cpp
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@ -8,19 +8,38 @@ void processInput(GLFWwindow* window) {
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
glfwSetWindowShouldClose(window, true);
}
if (glfwGetKey(window, GLFW_KEY_LEFT) == GLFW_PRESS) {
cam->yaw(1.0f*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_RIGHT) == GLFW_PRESS) {
cam->yaw(-1.0f*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_PRESS) {
cam->pitch(1.0f*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_DOWN) == GLFW_PRESS) {
cam->pitch(-1.0f*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS) {
cam->yaw(0.05f);
cam->panPosRelative(glm::vec3(-1.5f, 0.0f, 0.0f)*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS) {
cam->yaw(-0.05f);
cam->panPosRelative(glm::vec3(1.5f, 0.0f, 0.0f)*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS) {
cam->pitch(0.05f);
cam->panPosRelative(glm::vec3(0.0f, 0.0f, 1.5f)*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS) {
cam->pitch(-0.05f);
cam->panPosRelative(glm::vec3(0.0f, 0.0f, -1.5f)*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_SPACE) == GLFW_PRESS) {
cam->panPosRelative(glm::vec3(0.0f, 1.5f, 0.0f)*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS) {
cam->panPosRelative(glm::vec3(0.0f, -1.5f, 0.0f)*deltaTime);
}
if (glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS) {
cam->setPos(glm::vec3(0.0f, 0.0f, -2.0f));
cam->setTarget(glm::vec3(0.0f, 0.0f, 0.0f));
cam->setWorldUp(glm::vec3(0.0f, 1.0f, 0.0f));
}

71
include/Camera.h Normal file
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@ -0,0 +1,71 @@
#pragma once
#ifndef _NB_CAMERA
#define _NB_CAMERA
#include <GLLoad.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_inverse.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
namespace NB {
class Camera {
public:
typedef glm::vec3 Vec3;
typedef glm::mat4 Mat4;
enum CameraType : unsigned char {
None,
Orthographic,
Perspective
};
static Vec3 normCross(const Vec3&, const Vec3&);
Camera(
const Vec3& pos=Vec3(1.0f, 0.0f, 0.0f),
const Vec3& tar=Vec3(0.0f, 0.0f, 0.0f),
const Vec3& up =Vec3(0.0f, 1.0f, 0.0f)
);
Vec3 getPos() const;
Vec3 getTarget() const;
Vec3 getDirection() const;
Vec3 getWorldUp() const;
Vec3 getUp() const;
Vec3 getRight() const;
Mat4 getLookMatrix() const;
Mat4 getProjectionMatrix() const;
Mat4 getFlattenedMatrices() const;
void setProjection(const Mat4&);
void setPos(const Vec3&);
void setTarget(const Vec3&);
void setDirection(const Vec3&);
void setWorldUp(const Vec3&);
void addPos(const Vec3&);
void panPos(const Vec3&);
void panPosRelative(const Vec3&);
void addTarget(const Vec3&);
void roll(float);
void pitch(float);
void yaw(float);
protected:
Vec3 _pos;
Vec3 _tar;
Vec3 _dir;
Vec3 _world_up;
Vec3 _up;
Vec3 _right;
Mat4 _look;
Mat4 _proj;
const CameraType _camera_type;
void _calcLook();
};
}
#endif // _NB_CAMERA

59
include/Draw.h
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@ -5,9 +5,6 @@
#include <GLLoad.h>
#include <exception>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <map>
#include <string>
#include <vector>
@ -84,61 +81,5 @@ private:
};
class Camera {
public:
typedef glm::vec3 Vec3;
typedef glm::mat4 Mat4;
enum CameraType : unsigned char {
None,
Orthographic,
Perspective
};
static Vec3 normCross(const Vec3&, const Vec3&);
Camera(
const Vec3& pos=Vec3(1.0f, 0.0f, 0.0f),
const Vec3& tar=Vec3(0.0f, 0.0f, 0.0f),
const Vec3& up =Vec3(0.0f, 1.0f, 0.0f)
);
Vec3 getPos() const;
Vec3 getTarget() const;
Vec3 getDirection() const;
Vec3 getWorldUp() const;
Vec3 getUp() const;
Vec3 getRight() const;
Mat4 getLookMatrix() const;
Mat4 getProjectionMatrix() const;
Mat4 getFlattenedMatrices() const;
void setProjection(const Mat4&);
void setPos(const Vec3&);
void setTarget(const Vec3&);
void setDirection(const Vec3&);
void setWorldUp(const Vec3&);
void addPos(const Vec3&);
void panPos(const Vec3&);
void addTarget(const Vec3&);
void roll(float);
void pitch(float);
void yaw(float);
protected:
Vec3 _pos;
Vec3 _tar;
Vec3 _dir;
Vec3 _world_up;
Vec3 _up;
Vec3 _right;
Mat4 _look;
Mat4 _proj;
const CameraType _camera_type;
void _calcLook();
};
}
#endif

2
include/funcs.h
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@ -5,8 +5,10 @@
#include <thread>
#include <GLLoad.h>
#include "Draw.h"
#include "Camera.h"
extern NB::Camera* cam;
extern float deltaTime;
void framebuffer_size_callback(GLFWwindow*, int, int);

14
main.cpp
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@ -10,10 +10,13 @@
#include <chrono>
#include <Window.h>
#include "Draw.h"
#include "Buffers.h"
#include "Draw.h"
#include "Camera.h"
NB::Camera* cam;
float deltaTime = 0.0f;
float lastFrame = 0.0f;
int main() {
NB::Window myWindow(800, 600, "Howdy Naif!");
@ -49,27 +52,30 @@ int main() {
myCube.generateVBO(NB::vectorToRaw(vert_data));
myCube.generateEBO(elmt_data);
NB::Camera myCam(glm::vec3(0.0f, 0.0f, 1.0f));
NB::Camera myCam(glm::vec3(0.0f, 0.0f, -2.0f));
cam = &myCam;
myCam.setProjection(glm::perspective(glm::radians(45.0f), 800.0f/600.0f, 0.1f, 100.0f));
glm::mat4 lookMat;
// Window loop
GLenum err;
glEnable(GL_CULL_FACE);
while(!glfwWindowShouldClose(window)) {
deltaTime = glfwGetTime() - lastFrame;
lastFrame = glfwGetTime();
NB_GL_DEBUG_THROW("nothing", "during");
// Input checking
processInput(window);
// Rendering Loop
myShader.use();
lookMat = myCam.getLookMatrix();
lookMat = myCam.getFlattenedMatrices();
myShader.setMat4("look", lookMat);
glClearColor(0.2f, 0.4f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
myCube.draw();
// Events and buffer swap
// myDrawing.draw();
glfwPollEvents();
glfwSwapBuffers(window);
}

4
shaders/vert.vs
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@ -2,8 +2,10 @@
layout (location=0) in vec3 vPos;
layout (location=1) in vec3 vColor;
uniform mat4 look;
out vec3 vertColor;
void main() {
vertColor = vColor;
gl_Position = vec4(vPos, 1.0);
gl_Position = look * vec4(vPos, 1.0);
}