所以我刚刚开始使用 OpenGL,并决定制作一些体素渲染的东西。我正在尝试点亮它,但是当我围绕 y 轴旋转相机时会出现奇怪的效果。例如,当我第一次生成时,灯光看起来像这样:
http://i.stack.imgur.com/zQ49y.png
但是当我旋转一下时,我得到了这个:
http://i.stack.imgur.com/PWvVo.png
这是执行此操作的代码:
glRotatef(xrot, 1.0f, 0.0f, 0.0);
glRotatef(yrot, 0.0f, 1.0f, 0.0);
glTranslatef(-3.5f-xcam, ycam, -3.5f-zcam);
glEnable (GL_DEPTH_TEST); //enable the depth testing
glEnable (GL_LIGHTING); //enable the lighting
glEnable (GL_LIGHT0);
GLfloat specular[] = {1.0f-xcam, ycam+1.0, 1.0f-zcam, 1.0};
glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, grnd);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBegin(GL_QUADS);
glTexCoord2i(0, 0);
glVertex3f(0, 0, 0);
glTexCoord2i(0, 1);
glVertex3f(0, 0, 7.0f);
glTexCoord2i(1, 1);
glVertex3f(7.0f, 0, 7.0f);
glTexCoord2i(1, 0);
glVertex3f(7.0f, 0, 0);
glEnd();
glDisable(GL_TEXTURE_2D);
glLoadIdentity();
drawVoxel(2.f, 0.f, 2.f, tex);
drawVoxel(1.f, 0.f, 1.f, tex);
drawVoxel(2.f, 0.f, 2.f, tex);
drawVoxel(3.f, 0.f, 3.f, tex);
drawVoxel(4.f, 0.f, 4.f, tree);
drawVoxel(4.f, 1.f, 4.f, tree);
drawVoxel(4.f, 2.f, 4.f, tree);
drawVoxel(4.f, 3.f, 4.f, tree);
test.Flip();
有人知道发生了什么吗?