0.OpenGL mac 环境搭建

1.准备资源

• GLTools
• glew
• libGLTools.a

2.创建工程

2.1 打开XCode -> macOS ->App

2.2 添加OpenGL.framework和GLUT.framework2个系统库

2.3 将准备的资源文件拖入到工程中

2.4 删除原工程中的AppDelegate.h 、AppDelegate.m、ViewController.h、ViewController.m、main.m

2.5 创建main.cpp或者main.mm.创建main.cpp文件取消掉勾选头文件项

2.6 添加头文件路径

3.测试环境是否搭建成功

main.cpp代码如下:

#include "GLShaderManager.h"
#include "GLTools.h"
#include <GLUT/GLUT.h>

/ /定义一个，着色管理器
GLShaderManager shaderManager;
/ /简单的批次容器，是GLTools的一个简单的容器类。
GLBatch triangleBatch;

void changeSize(int w,int h)
{
  glViewport(0, 0, w, h);
}

void RenderScene(void)
{
  glClear(GL_COLOR_BUFFER_BIT |                 
 GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
 GLfloat vRed[] = {1.0,1.00,1.0,0.5f};   
 shaderManager.UseStockShader(GLT_SHADER_IDENTITY,vRed);
 triangleBatch.Draw();
 glutSwapBuffers();  
}

void setupRC()
{
  glClearColor(0.98f, 0.40f, 0.7f, 1);
  shaderManager.InitializeStockShaders();
  GLfloat vVerts[] = {
    -0.5f,0.0f,0.0f,
    0.5f,0.0f,0.0f,
    0.0f,0.5f,0.0f
  };
  triangleBatch.Begin(GL_TRIANGLES, 3);
  triangleBatch.CopyVertexData3f(vVerts);
  triangleBatch.End();  
}

int main(int argc,char *argv[])
{
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_DEPTH|
 GLUT_STENCIL);

//GLUT窗口大小、窗口标题
glutInitWindowSize(800, 600);
glutCreateWindow("Triangle");

glutReshapeFunc(changeSize);
glutDisplayFunc(RenderScene);

GLenum status = glewInit();
if (GLEW_OK != status) {
    
    printf("GLEW Error:%s\n",glewGetErrorString(status));
    return 1;
}
setupRC();
glutMainLoop();
return  0;
}

4.测试效果