模板查询
可以用glGetInteger函数获取与模板相关的参数值
#include "header.h" float dRadius =0; float dAngel; float aspect=0; void init() { glClearColor(0,0,1.0,0); glClearStencil(0); glClearDepth(1.0f); glEnable(GL_STENCIL_TEST); } void display() { glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT); glLoadIdentity(); glTranslatef(0, 0, -20); ////glStencilFunc(GL_ALWAYS, 0,0x00); glStencilFunc(GL_NEVER,0x0,0xFF); glStencilOp(GL_INCR,GL_INCR,GL_INCR); glColor3f(1.0f,1.0f,1.0f); dRadius = 5.0*(sqrt(2.0)/2.0); glBegin(GL_LINE_STRIP); for (dAngel=0;dAngel<380.0;dAngel+=0.1) { glVertex2d(dRadius*cos(dAngel),dRadius*sin(dAngel)); dRadius*=1.003; } glEnd(); glStencilFunc(GL_NOTEQUAL,0x1,0xFF); glStencilOp(GL_INCR,GL_INCR,GL_INCR);// glColor3f(1.0f,0.0f,0.0f); glRectf(-5,-5,5,5); glutSwapBuffers(); } void reshape(int w, int h) { glViewport(0,0,w,h); aspect = (w*1.0)/h; glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60, aspect, 1, 100); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } int main(int argc, char** argv) { glutInit(&argc, argv); //glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_STENCIL); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_STENCIL|GLUT_DEPTH); glutInitWindowPosition(200,200); glutInitWindowSize(600,600); glutCreateWindow("模板缓冲区与模板测试"); glewInit(); init(); glutReshapeFunc(reshape); glutDisplayFunc(display); glutMainLoop(); return 0; } |
