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我不知道如何解決這個問題,我想用這個函數來製作一個軟渲染引擎來學習3D管道。 它看起來像你的文章主要是代碼;請添加更多的細節。由glfw繪製的渲染圖只渲染四分之一屏幕。緩衝區使用屏幕寬度*高度
這是代碼:
#define GLFW_INCLUDE_GLU
#include <GLFW/glfw3.h>
int main(int argc, const char * argv[]) {
if(!glfwInit()){ //init error
return -1;
}
int width = 200; //screen width
int height = 200; //screen height
GLFWwindow* window = glfwCreateWindow(width, height, "Hello OpenGL", NULL, NULL); //create window
if(!window){ //create window fail
glfwTerminate();
return -1;
}
u_char* pixels = new unsigned char[width * height * 4]; //buffer
uint index; //temp
//set pixel
for (int count_a = 0; count_a < width; count_a++) {
for (int count_b = 0; count_b < height; count_b++) {
index = count_b * width + count_a;
pixels[index * 4 + 0] = 255; //red pixel
pixels[index * 4 + 1] = 0; //green
pixels[index * 4 + 2] = 0; //blue
pixels[index * 4 + 3] = 255; //alpha
}
}
glfwMakeContextCurrent(window);
while (!glfwWindowShouldClose(window)) { //close window
glClearColor(1.0, 1.0, 1.0, 1.0); //clear screen by white pixel
glClear(GL_COLOR_BUFFER_BIT);
glRasterPos2f(-1, -1); //set origin to screen bottom left
//glPixelZoom(2, 2); //if i use this function. renderer is right.
glDrawPixels(width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels); //draw pixel
glfwSwapBuffers(window); //swap buffer
}
glfwTerminate();
return 0;
}
您使用的是什麼版本的OpenGL? – Exide
嘗試調用glLoadIdentity。而不是glRasterPos,請指定您自己的投影矩陣 – RecursiveExceptionException