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opengl-step-by-step
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| // gcc 01.hello-world.c -o 01.hello-world && ./01.hello-world | |
| #include <stdio.h> | |
| int main(int argc, char ** argv) { | |
| printf("Hello World!"); | |
| return 0; | |
| } |
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| // gcc 02.blank-window.c -o 02.blank-window -framework OpenGL -framework GLUT && ./02.blank-window | |
| #include <stdio.h> | |
| #include <GL/glew.h> | |
| #include "GLUT/glut.h" | |
| static void render(void) { | |
| glClearColor(0.0f, 0.0f, 0.0f, 1.0f); | |
| glClear(GL_COLOR_BUFFER_BIT); | |
| glutSwapBuffers(); | |
| } | |
| int main(int argc, char** argv) { | |
| // 初始化 GLUT，可以接收参数 | |
| glutInit(&argc, argv); | |
| // 设置双缓冲、颜色模式 | |
| glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA); | |
| // 窗口的位置、大小、标题 | |
| glutInitWindowSize(800, 600); | |
| glutInitWindowPosition(200, 100); | |
| glutCreateWindow("02.Blank Window"); | |
| // 设置渲染回调函数 | |
| glutDisplayFunc(&render); | |
| // 主循环 | |
| glutMainLoop(); | |
| return 0; | |
| } |
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| // gcc 03.triangle.c -o 03.triangle -framework OpenGL -framework GLUT && ./03.triangle | |
| #include <stdio.h> | |
| #include <GL/glew.h> | |
| #include "GLUT/glut.h" | |
| static void render(void) { | |
| glClearColor(0.0f, 0.0f, 0.0f, 1.0f); | |
| glClear(GL_COLOR_BUFFER_BIT); | |
| glBegin(GL_TRIANGLES); | |
| glColor3f( 1, 0, 0 ); // red | |
| glVertex2f( 0.0, 0.0 ); | |
| glColor3f( 0, 1, 0 ); // green | |
| glVertex2f( 1.0, 0.0 ); | |
| glColor3f( 0, 0, 1 ); // blue | |
| glVertex2f( 1.0, 1.0 ); | |
| glColor3f( 1, 0, 0 ); // red | |
| glVertex2f( 0.0, 0.0 ); | |
| glColor3f( 0, 0, 1 ); // blue | |
| glVertex2f( 1.0, 1.0 ); | |
| glColor3f( 0, 1, 0 ); // green | |
| glVertex2f( 0.0, 1.0 ); | |
| glEnd(); | |
| glutSwapBuffers(); | |
| } | |
| int main(int argc, char** argv) { | |
| // 初始化 GLUT，可以接收参数 | |
| glutInit(&argc, argv); | |
| // 设置双缓冲、颜色模式 | |
| glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA); | |
| // 窗口的位置、大小、标题 | |
| glutInitWindowSize(800, 600); | |
| glutInitWindowPosition(200, 100); | |
| glutCreateWindow("02.Blank Window"); | |
| // 设置渲染回调函数 | |
| glutDisplayFunc(&render); | |
| // 主循环 | |
| glutMainLoop(); | |
| return 0; | |
| } |
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