I want to draw a car in my world. but I have a problem with lighting, when my car rotates, it seems that a change of position when turning the car; but when I draw a simple cube with an overflow function, it works correctly.
void mydisplay () {
glLoadIdentity()
glDisable(GL_LIGHT0);
glColorMaterial ( GL_FRONT_AND_BACK, GL_DIFFUSE) ;
glColor3f(1.0,1.0,1.0);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
p2[0]=50.0;
p2[1]=3.0;
p2[2]=0.0;
glLightfv(GL_LIGHT0,GL_POSITION,p2);
glEnable(GL_LIGHT0);
gluLookAt(50.0,3.0,0.0,0.0,0.0,0.0,0.0,1.0,0.0);
glPushMatrix();
glRotatef(tet,0.0,1.0,0.0);
glutSolidCube(20);
glPopMatrix();
tet+=3.141592653/4;
glutSwapBuffers();
}
when glutSolidCube (20); change my drawing code, it works poorly my code:
void Drawing () {
glEnableClientState(GL_VERTEX_ARRAY);
GLfloat CubeVertex[]={ -20.0,0.0,10.0,//\/\/\/\/\/\\\///\/\/\/\/\/\/\/\/\/\/\/\/\/\/
-20.0,0.0,-10.0,
-20.0,3.0,-10.0,
-20.0,3.0,10.0, ///BIG CUBE
20.0,0.0,10.0,
20.0,0.0,-10.0,
20.0,3.0,-10.0,
20.0,3.0,10.0,////////\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
-10.0,3.0,10.0,
-10.0,3.0,-10.0,
-10.0,5.0,-10.0,
-10.0,5.0,10.0, //SMALL CUBE
10.0,3.0,10.0,
10.0,3.0,-10.0,
10.0,5.0,-10.0,
10.0,5.0,10.0,//\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\//
-100.0,-2.4,100.0,
-100.0,-2.4,-100.0, //FLOOR
100.0,-2.4,100.0,
100.0,-2.4,-100.0
};//\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\/\//
GLubyte big_back[]={0,3,2,1};
GLubyte big_front[]={4,5,6,7};
GLubyte big_left[]={4,0,3,7};
GLubyte big_right[]={1,2,6,5};
GLubyte big_up[]={2,3,7,6};
GLubyte big_down[]={0,1,5,4};
GLubyte small_back[]={9,10,11,8};
GLubyte small_front[]={12,13,14,15};
GLubyte small_left[]={8,11,15,12};
GLubyte small_right[]={9,10,14,13};
GLubyte small_up[]={10,11,15,14};
GLubyte floor[]={16,17,19,18};
GLsizei count[]={4,4,4,4,4,4,4,4,4,4,4,4};
GLvoid* indices[12]={big_back,big_front,big_left,big_right,big_up,big_down,small_back,small_front,small_left,small_right,small_up,floor};
glVertexPointer(3,GL_FLOAT,0,CubeVertex);
for(int i=0;i<12;i++){//////////////////glMultiDrawElement////////////////
if(count[i]>0)
glDrawElements(GL_QUADS,count[i],GL_UNSIGNED_BYTE,indices[i]);
}//////////////////////////////glMultiDrawElements//////////////////////
}
Thank.