灯光不工作,物体以纯色显示。颜色本身会随着材质或照明参数而变化,但没有阴影或任何东西,只是纯灰色。
以下是部分代码:
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glFrontFace(GL_CCW);
glShadeModel(GL_FLAT);
glEnable(GL_LIGHTING);
GLfloat amb[] = {0.6, 0.6, 0.6, 1.0};
GLfloat dif[] = {0.8, 0.8, 0.8, 1.0};
GLfloat spec[] = {0.5, 0.5, 0.5, 1.0};
GLfloat pos[] = {0.0, 0.0, 30.0};
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_AMBIENT, amb);
glLightfv(GL_LIGHT0, GL_DIFFUSE, dif);
glLightfv(GL_LIGHT0, GL_SPECULAR, spec);
glLightfv(GL_LIGHT0, GL_POSITION, pos);
GLfloat co[4]={0.5, 0.5, 0.5, 0.5};
GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat mat_shininess[] = { 1.0 };
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, co);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);
for(int i=0; i < numofTr; i++)
{
glBegin(GL_TRIANGLES);
glNormal3f(tr[i].v1->n.x, tr[i].v1->n.y, tr[i].v1->n.z);
glVertex3f(tr[i].v1->x, tr[i].v1->y, tr[i].v1->z);
glNormal3f(tr[i].v2->n.x, tr[i].v2->n.y, tr[i].v2->n.z);
glVertex3f(tr[i].v2->x, tr[i].v2->y, tr[i].v2->z);
glNormal3f(tr[i].v3->n.x, tr[i].v3->n.y, tr[i].v3->n.z);
glVertex3f(tr[i].v3->x, tr[i].v3->y, tr[i].v3->z);
glEnd();
}
我不知道我错过了什么,法线与对象一起显示时看起来不错。