我想用opengl实现一个动态显示路径的功能,但当我添加完纹理再绘制图形(直线)时,纹理会覆盖住直线,有没有办法让直线覆盖住纹理呢?
添加纹理,直线的函数如下
void display(void)
{
//glClear(GL_COLOR_BUFFER_BIT);
//绘制像素
glColor3f(1.0f, 1.0f, 1.0f);
glDrawPixels(imagewidth, imageheight, GL_BGR_EXT, GL_UNSIGNED_BYTE, pixeldata);
glFlush();
glutSwapBuffers();
glColor3f(1.0f,0.0f,0.0f);
glBegin(GL_LINES);
glVertex2f(-100.0f, -100.0f);
glVertex2f(100.0f, 100.0f);
glEnd();
}
情况如下图