我想使用模板缓冲区创建一堵里面有窗户的墙。我的代码如下所示:
glEnable(GL_STENCIL_TEST);
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
glStencilMask(1);
glStencilFunc(GL_ALWAYS, 1, 1);
glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
glDisable(GL_DEPTH_TEST);
glColor3f(1,1,1);
//Window
glBegin(GL_POLYGON);
glVertex3d(-5,0,-20);
glVertex3d(-5,0,40);
glVertex3d(-20,0,40);
glVertex3d(-20,0,-20);
glEnd();
glEnable(GL_DEPTH_TEST);
glStencilFunc(GL_NOTEQUAL, 1, 1);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glEnable(GL_CLIP_PLANE0);
glClipPlane(GL_CLIP_PLANE0, eqr);
glBindTexture(GL_TEXTURE_2D,texture[1]);
glBegin(GL_POLYGON);
glNormal3f(0.0f,-1.0,0.0f);
//Wall
glTexCoord2f(0.0f, 0.0f);glVertex3d(20,0,-20);
glTexCoord2f(1.0f, 0.0f);glVertex3d(20,0,40);
glTexCoord2f(1.0f, 0.0f);glVertex3d(-20,0,40);
glTexCoord2f(1.0f, 0.0f);glVertex3d(-20,0,-20);
glEnd();
glDisable(GL_STENCIL_TEST);
但这不起作用,我得到了整个填充墙,没有窗户,有什么建议吗?