146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
#include "lopenglprogram.h"
|
|
#include "camera.h"
|
|
#include <GL/gl.h>
|
|
#include <GL/glext.h>
|
|
#include <GLFW/glfw3.h>
|
|
#include <glm/fwd.hpp>
|
|
#include <iostream>
|
|
#include <memory>
|
|
#include <utility>
|
|
void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
|
|
glViewport(0, 0, width, height);
|
|
}
|
|
|
|
void process_input(GLFWwindow* window) {
|
|
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
|
|
glfwSetWindowShouldClose(window, true);
|
|
}
|
|
}
|
|
|
|
class GLWidget {
|
|
|
|
public:
|
|
struct ViewPort {
|
|
int width;
|
|
int height;
|
|
};
|
|
GLWidget(ViewPort port) : viewport_(port) {
|
|
lastX_ = port.width / 2;
|
|
lastY_ = port.height / 2;
|
|
}
|
|
~GLWidget() {}
|
|
|
|
|
|
void setViewPort(int width, int height) {
|
|
viewport_ = {width, height};
|
|
}
|
|
|
|
bool initGeometry() {
|
|
window = std::make_unique(glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL));
|
|
if (window == NULL) {
|
|
std::cout << "Failed to create GLFW window" << std::endl;
|
|
glfwTerminate();
|
|
return -1;
|
|
}
|
|
glfwMakeContextCurrent(window);
|
|
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
|
|
std::cout << "Failed to initialize GLAD" << std::endl;
|
|
return -1;
|
|
}
|
|
|
|
glViewport(0, 0, 800, 600);
|
|
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
|
|
}
|
|
public:
|
|
bool initBgProgram(const std::string& vpath, const std::string fpath) {
|
|
auto vshader = std::make_unique<LOpenGLShader>(LOpenGLShader::ShaderType::Vertex);
|
|
auto fshader = std::make_unique<LOpenGLShader>(LOpenGLShader::ShaderType::Fragment);
|
|
vshader->compileShaderFromFile(vpath);
|
|
fshader->compileShaderFromFile(fpath);
|
|
bgProg_ = std::make_unique<LOpenGLProgram>();
|
|
bgProg_->addShader(std::move(vshader));
|
|
bgProg_->addShader(std::move(fshader));
|
|
bool ret = bgProg_->Link();
|
|
if (!ret) {
|
|
return false;
|
|
}
|
|
const float verts[] = {
|
|
-1.0, -1.0, 1.0, -1.0, 1.0, 1.0,
|
|
-1.0, -1.0, 1.0, 1.0, -1.0, 1.0,
|
|
};
|
|
if (bgVao_) {
|
|
glDeleteVertexArrays(1, &bgVao_);
|
|
}
|
|
if (bgVbo_) {
|
|
glDeleteBuffers(1, &bgVbo_);
|
|
}
|
|
|
|
glGenVertexArrays(1, &bgVao_);
|
|
glBindVertexArray(bgVao_);
|
|
|
|
glGenBuffers(1, &bgVbo_);
|
|
glBindBuffer(GL_ARRAY_BUFFER, bgVbo_);
|
|
glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
|
|
|
|
glEnableVertexAttribArray(0);
|
|
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (void*)0);
|
|
glBindVertexArray(0);
|
|
|
|
}
|
|
|
|
void drawBg() {
|
|
bgProg_->Use();
|
|
bgProg_->setUniformValue("uViewport", glm::vec2(viewport_.width, viewport_.height));
|
|
bgProg_->setUniformValue("uMajorStep", 120.0f);
|
|
bgProg_->setUniformValue("uMinjorStep", 24.0f);
|
|
glBindVertexArray(bgVao_);
|
|
glDrawArrays(GL_TRIANGLES, 0, 6);
|
|
glBindVertexArray(0);
|
|
|
|
glDepthMask(GL_TRUE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
}
|
|
|
|
void mouseCallback(GLFWwindow* window, double x, double y) {
|
|
float xpos = static_cast<float>(x);
|
|
float ypos = static_cast<float>(y);
|
|
|
|
if (camera_.fir) {
|
|
|
|
}
|
|
}
|
|
private:
|
|
std::unique_ptr<LOpenGLProgram> bgProg_;
|
|
std::unique_ptr<GLFWwindow> window_;
|
|
unsigned int bgVao_;
|
|
unsigned int bgVbo_;
|
|
ViewPort viewport_{800, 600};
|
|
Camera camera_;
|
|
|
|
bool firstMouse_ = true;
|
|
float lastX_;
|
|
float lastY_;
|
|
};
|
|
|
|
int main() {
|
|
glfwInit();
|
|
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
|
|
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
|
|
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
|
|
#if __APPLE__
|
|
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
|
|
#endif
|
|
|
|
|
|
|
|
GLWidget glw;
|
|
glw.initBgProgram("bg.vert", "bg.frag");
|
|
|
|
while (!glfwWindowShouldClose(window)) {
|
|
|
|
glw.drawBg();
|
|
}
|
|
|
|
glfwTerminate();
|
|
return 0;
|
|
} |