// Gets the three coefficients of a plane equation given three points on the plane.
void gltGetPlaneEquation(GLTVector3 vPoint1, GLTVector3 vPoint2, GLTVector3 vPoint3, GLTVector3 vPlane)
{
// Get normal vector from three points. The normal vector is the first three coefficients
// to the plane equation...
gltGetNormalVector(vPoint1, vPoint2, vPoint3, vPlane);
// Final coefficient found by back substitution
vPlane[3] = -(vPlane[0] * vPoint3[0] + vPlane[1] * vPoint3[1] + vPlane[2] * vPoint3[2]);
}
void DrawJet()
{
GLTVector3 vNormal; // Storeage for calculated surface normal
glColor3ub(128,128,128);
glBegin(GL_TRIANGLES);
//front bottom
glNormal3f(0.0f, -1.0f, 0.0f);
// glVertex3f(0.0f, 0.0f, 60.0f);
// glVertex3f(-15.0f, 0.0f, 30.0f);
// glVertex3f(15.0f,0.0f,30.0f);
// //¡÷ºÆ√≥∏Æ ¡¶∞≈
//Right Winng
GLTVector3 vPoints[3] = {{ 15.0f, 0.0f, 30.0f},
{ 0.0f, 15.0f, 30.0f},
{ 0.0f, 0.0f, 60.0f}};
// Calculate the normal for the plane
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
{
GLTVector3 vPoints[3] = {{ 0.0f, 0.0f, 60.0f },
{ 0.0f, 15.0f, 30.0f },
{ -15.0f, 0.0f, 30.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
// Body of the Plane ////////////////////////
{
GLTVector3 vPoints[3] = {{ -15.0f, 0.0f, 30.0f },
{ 0.0f, 15.0f, 30.0f },
{ 0.0f, 0.0f, -56.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 0.0f, 0.0f, -56.0f },
{ 0.0f, 15.0f, 30.0f },
{ 15.0f,0.0f,30.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
glNormal3f(0.0f, -1.0f, 0.0f);
glVertex3f(15.0f,0.0f,30.0f);
glVertex3f(-15.0f, 0.0f, 30.0f);
glVertex3f(0.0f, 0.0f, -56.0f);
///////////////////////////////////////////////
// Left wing
// Large triangle for bottom of wing
{
GLTVector3 vPoints[3] = {{ 0.0f,2.0f,27.0f },
{ -60.0f, 2.0f, -8.0f },
{ 60.0f, 2.0f, -8.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 60.0f, 2.0f, -8.0f},
{0.0f, 7.0f, -8.0f},
{0.0f,2.0f,27.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{60.0f, 2.0f, -8.0f},
{-60.0f, 2.0f, -8.0f},
{0.0f,7.0f,-8.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{0.0f,2.0f,27.0f},
{0.0f, 7.0f, -8.0f},
{-60.0f, 2.0f, -8.0f}};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
// Tail section///////////////////////////////
// Bottom of back fin
glNormal3f(0.0f, -1.0f, 0.0f);
glVertex3f(-30.0f, -0.50f, -57.0f);
glVertex3f(30.0f, -0.50f, -57.0f);
glVertex3f(0.0f,-0.50f,-40.0f);
{
GLTVector3 vPoints[3] = {{ 0.0f,-0.5f,-40.0f },
{30.0f, -0.5f, -57.0f},
{0.0f, 4.0f, -57.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 0.0f, 4.0f, -57.0f },
{ -30.0f, -0.5f, -57.0f },
{ 0.0f,-0.5f,-40.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 30.0f,-0.5f,-57.0f },
{ -30.0f, -0.5f, -57.0f },
{ 0.0f, 4.0f, -57.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 0.0f,0.5f,-40.0f },
{ 3.0f, 0.5f, -57.0f },
{ 0.0f, 25.0f, -65.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 0.0f, 25.0f, -65.0f },
{ -3.0f, 0.5f, -57.0f},
{ 0.0f,0.5f,-40.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
{
GLTVector3 vPoints[3] = {{ 3.0f,0.5f,-57.0f },
{ -3.0f, 0.5f, -57.0f },
{ 0.0f, 25.0f, -65.0f }};
gltGetNormalVector(vPoints[0], vPoints[1], vPoints[2], vNormal);
glNormal3fv(vNormal);
glVertex3fv(vPoints[0]);
glVertex3fv(vPoints[1]);
glVertex3fv(vPoints[2]);
}
glEnd();
}
void Lighting::gltGetPlaneEquation(GLTVector3 vPoint1, GLTVector3 vPoint2, GLTVector3 vPoint3, GLTVector3 vPlane)
{
gltGetNormalVector(vPoint1, vPoint2, vPoint3, vPlane);
vPlane[3] = -(vPlane[0] * vPoint3[0] + vPlane[1] * vPoint3[1] + vPlane[2] * vPoint3[2]);
}
