void OPENGL_3D_ENGNIE::CreateSignRoadSideShowList()
{
GLfloat
Point1[] = {-0.5f, 0.5f, 0.01f},
Point2[] = {0.5f, 0.5f, 0.01f},
Point3[] = {0.5f, -0.5f, 0.01f},
Point4[] = {-0.5f,-0.5f, 0.01f},
Point5[] = {-0.5f, 0.5f, -0.01f},
Point6[] = {0.5f, 0.5f, -0.01f},
Point7[] = {0.5f, -0.5f, -0.01f},
Point8[] = {-0.5f,-0.5f, -0.01f};
GLfloat
ColorR[] = {1, 0, 0,0.5},
ColorY[] = {1, 1, 0,0.5};
SignShowList_roadSide = glGenLists(1);
glNewList(SignShowList_roadSide, GL_COMPILE);
glBegin(GL_QUADS);
// 正面贴图
glTexCoord2f(0.0f, 1.0f);
ColoredVertex(ColorR, Point1);
glTexCoord2f(1.0f, 1.0f);
ColoredVertex(ColorR, Point2);
glTexCoord2f(1.0f, 0.0f);
ColoredVertex(ColorR, Point3);
glTexCoord2f(0.0f, 0.0f);
ColoredVertex(ColorR, Point4);
// 反面
ColoredVertex(ColorY, Point5);
ColoredVertex(ColorY, Point6);
ColoredVertex(ColorY, Point7);
ColoredVertex(ColorY, Point8);
// 侧面
ColoredVertex(ColorR, Point1);
ColoredVertex(ColorR, Point4);
ColoredVertex(ColorY, Point8);
ColoredVertex(ColorY, Point5);
ColoredVertex(ColorR, Point1);
ColoredVertex(ColorR, Point2);
ColoredVertex(ColorY, Point6);
ColoredVertex(ColorY, Point5);
ColoredVertex(ColorR, Point2);
ColoredVertex(ColorR, Point3);
ColoredVertex(ColorY, Point7);
ColoredVertex(ColorY, Point6);
ColoredVertex(ColorR, Point3);
ColoredVertex(ColorR, Point4);
ColoredVertex(ColorY, Point8);
ColoredVertex(ColorY, Point7);
glEnd();
glEndList();
}
void myDisplay(void)
{
static int list = 0;
if( list == 0 )
{
// 如果显示列表不存在，则创建
/* GLfloat
PointA[] = {-0.5, -5*sqrt(5)/48, sqrt(3)/6},
PointB[] = { 0.5, -5*sqrt(5)/48, sqrt(3)/6},
PointC[] = { 0, -5*sqrt(5)/48, -sqrt(3)/3},
PointD[] = { 0, 11*sqrt(6)/48, 0}; */
// 2007年4月27日修改
GLfloat
PointA[] = { 0.5f, -sqrt(6.0f)/12, -sqrt(3.0f)/6},
PointB[] = {-0.5f, -sqrt(6.0f)/12, -sqrt(3.0f)/6},
PointC[] = { 0.0f, -sqrt(6.0f)/12, sqrt(3.0f)/3},
PointD[] = { 0.0f, sqrt(6.0f)/4, 0};
GLfloat
ColorR[] = {1, 0, 0},
ColorG[] = {0, 1, 0},
ColorB[] = {0, 0, 1},
ColorY[] = {1, 1, 0};
list = glGenLists(1);
glNewList(list, GL_COMPILE);
glBegin(GL_TRIANGLES);
// 平面ABC
ColoredVertex(ColorR, PointA);
ColoredVertex(ColorG, PointB);
ColoredVertex(ColorB, PointC);
// 平面ACD
ColoredVertex(ColorR, PointA);
ColoredVertex(ColorB, PointC);
ColoredVertex(ColorY, PointD);
// 平面CBD
ColoredVertex(ColorB, PointC);
ColoredVertex(ColorG, PointB);
ColoredVertex(ColorY, PointD);
// 平面BAD
ColoredVertex(ColorG, PointB);
ColoredVertex(ColorR, PointA);
ColoredVertex(ColorY, PointD);
glEnd();
glEndList();
glEnable(GL_DEPTH_TEST);
}
// 已经创建了显示列表，在每次绘制正四面体时将调用它
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle, 1, 0.5, 0);
glCallList(list);
glPopMatrix();
glutSwapBuffers();
}
