glm::vec3 Path::GetPosition(float time)
{
int i0 = (int)time;
if (i0 == Points.size())
i0 = 0;
int i1 = i0 + 1;
if (i1 == Points.size())
i1 = 0;
glm::vec3 p0 = Points[i0];
glm::vec3 p1 = Points[i1];
glm::vec3 m_lin = p1 - p0;
glm::vec3 m0 = Curved ? CatmullRomTangent(i0): m_lin;
glm::vec3 m1 = Curved ? CatmullRomTangent(i1): m_lin;
float t = glm::fract(time);
float t2 = t * t;
float t3 = t2 * t;
glm::vec3 pt =
(1 - 3 * t2 + 2 * t3) * p0 +
(3 * t2 - 2 * t3) * p1 +
(t - 2 * t2 + t3) * m0 +
(-t2 + t3) * m1;
return pt;
}
void camera()
{
int j=0;
int i=move_i;
p.x= CatmullRom(move, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
p.y= CatmullRom(move, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
p.z= CatmullRom(move, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t.x= CatmullRomTangent(move, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
t.y= CatmullRomTangent(move, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
t.z= CatmullRomTangent(move, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t = normalize(t);
n = CrossProduct(t, v);
n = normalize(n);
b = CrossProduct(t, n);
b = normalize(b);
float f=0.05,f1=0.1;
point c;
f=0.1,f1=0.05;
c.x = p.x +f1*n.x + f*b.x;
c.y = p.y + f1*n.y + f*b.y;
c.z = p.z + f1*n.z + f*b.z;
gluLookAt(
// 5.0,5.0,14.0,
c.x,c.y,c.z,
p.x+f1*n.x+t.x, p.y+f1*n.y+t.y, p.z+f1*n.z+t.z,
b.x,b.y,b.z);
}
void displayRails()
{
//DISPLAY RAILS ON ROLLER COASTER
glColor3f(1.0, 1.0, 1.0);
texture = LoadTexture("wood.jpg",256, 256);
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
for (int j = 0; j < g_iNumOfSplines; j++) {
for(int i=-2;i<g_Splines[j].numControlPoints-1;i++)
{
for(float u=0.0;u<1.0;u+=0.05){
point p,t,n,v,n1,t1,p1;
v.x=0.0;v.y=0.0;v.z=-1.0;
float f=0.1;
//Point
p.x= CatmullRom(u, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
p.y= CatmullRom(u, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
p.z= CatmullRom(u, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
//Tangent
t.x= CatmullRomTangent(u, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
t.y= CatmullRomTangent(u, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
t.z= CatmullRomTangent(u, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t = normalize(t);
//Normal
n = CrossProduct(t, v);
n = normalize(n);
p1.x= CatmullRom(u+0.01, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
p1.y= CatmullRom(u+0.01, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
p1.z= CatmullRom(u+0.01, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t1.x= CatmullRomTangent(u+0.01, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
t1.y= CatmullRomTangent(u+0.01, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
t1.z= CatmullRomTangent(u+0.01, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t1 = normalize(t1);
n1 = CrossProduct(t1, v);
n1 = normalize(n1);
glColor3f(1.0, 1.0, 1.0);
glTexCoord2d(0.0,0.0);glVertex3f(p.x,p.y,p.z);
glTexCoord2d(3,0.0);glVertex3f(p.x+f*(n.x),p.y+f*(n.y),p.z+f*(n.z));
glTexCoord2d(3,1);glVertex3f(p1.x+f*(n1.x),p1.y+f*(n1.y),p1.z+f*(n1.z));
glTexCoord2d(0.0,1);glVertex3f(p1.x,p1.y,p1.z);
glColor3f(1.0, 1.0, 1.0);
glTexCoord2d(0.0,0.0);glVertex3f(p.x,p.y,p.z-0.003);
glTexCoord2d(3.0,0.0);glVertex3f(p.x+f*(n.x),p.y+f*(n.y),p.z+f*(n.z)-0.003);
glTexCoord2d(3.0,1.0);glVertex3f(p1.x+f*(n1.x),p1.y+f*(n1.y),p1.z+f*(n1.z)-0.003);
glTexCoord2d(0.0,1.0);glVertex3f(p1.x,p1.y,p1.z-0.003);
glColor3f(0.8, 0.5, 0.0);
glTexCoord2d(0.0,0.0);glVertex3f(p.x,p.y,p.z);
glTexCoord2d(3.0,0.0);glVertex3f(p.x+f*(n.x),p.y+f*(n.y),p.z+f*(n.z));
glTexCoord2d(3.0,1.0);glVertex3f(p.x+f*(n.x),p.y+f*(n.y),p.z+f*(n.z)-0.003);
glTexCoord2d(0.0,1.0);glVertex3f(p.x,p.y,p.z-0.003);
glColor3f(1.0, 1.0, 1.0);
glTexCoord2d(0.0,0.0);glVertex3f(p1.x,p1.y,p1.z);
glTexCoord2d(3.0,0.0);glVertex3f(p1.x+f*(n1.x),p1.y+f*(n1.y),p1.z+f*(n1.z));
glTexCoord2d(3.0,1.0);glVertex3f(p1.x+f*(n1.x),p1.y+f*(n1.y),p1.z+f*(n1.z)-0.003);
glTexCoord2d(0.0,1.0);glVertex3f(p1.x,p1.y,p1.z-0.003);
}
}
}
glEnd();
glDisable(GL_TEXTURE_2D);
}
void displayRollerCoaster()
{
//DISPLAY THE ROLLER COASTER
float a=0.01,f=0.1;
texture = LoadTexture("wood.jpg",256, 256);
glEnable(GL_TEXTURE_2D);
for(float r=0;r<2;r++){
glBegin(GL_QUADS);
for (int j = 0; j < g_iNumOfSplines; j++) {
for(int i=-2;i<g_Splines[j].numControlPoints-1;i++)
{
for(float u=0.0;u<1.0;u+=0.02){
//Point
p.x= CatmullRom(u, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
p.y= CatmullRom(u, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
p.z= CatmullRom(u, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
//Tangent
t.x= CatmullRomTangent(u, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
t.y= CatmullRomTangent(u, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
t.z= CatmullRomTangent(u, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t = normalize(t);
//Normal
n = CrossProduct(t, v);
n = normalize(n);
//Binormal
b = CrossProduct(t, n);
b = normalize(b);
p1.x= CatmullRom(u+0.02, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
p1.y= CatmullRom(u+0.02, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
p1.z= CatmullRom(u+0.02, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t1.x= CatmullRomTangent(u+0.02, g_Splines[j].points[i].x, g_Splines[j].points[i+1].x, g_Splines[j].points[i+2].x, g_Splines[j].points[i+3].x);
t1.y= CatmullRomTangent(u+0.02, g_Splines[j].points[i].y, g_Splines[j].points[i+1].y, g_Splines[j].points[i+2].y, g_Splines[j].points[i+3].y);
t1.z= CatmullRomTangent(u+0.02, g_Splines[j].points[i].z, g_Splines[j].points[i+1].z, g_Splines[j].points[i+2].z, g_Splines[j].points[i+3].z);
t1 = normalize(t1);
n1 = CrossProduct(t1, v);
n1 = normalize(n1);
b1 = CrossProduct(t1, n1);
b1 = normalize(b1);
if(r==1)
{
p.x+=f*n.x;
p.y+=f*n.y;
p.z+=f*n.z;
p1.x+=f*n1.x;
p1.y+=f*n1.y;
p1.z+=f*n1.z;
}
glColor3f(1.0, 0.0, 0.0);
//V1
glTexCoord2d(0.0,0.0);glVertex3f(p.x+a*(n.x-b.x),p.y+a*(n.y-b.y),p.z+a*(n.z-b.z));
//V2
glTexCoord2d(1.0,0.0);glVertex3f(p.x+a*(n.x+b.x),p.y+a*(n.y+b.y),p.z+a*(n.z+b.z));
//V3
glTexCoord2d(1.0,1.0);glVertex3f(p.x+a*(-n.x+b.x),p.y+a*(-n.y+b.y),p.z+a*(-n.z+b.z));
//V4
glTexCoord2d(0.0,1.0);glVertex3f(p.x+a*(-n.x-b.x),p.y+a*(-n.y-b.y),p.z+a*(-n.z-b.z));
//V5
glTexCoord2d(0.0,0.0);glVertex3f(p1.x+a*(n1.x-b1.x),p1.y+a*(n1.y-b1.y),p1.z+a*(n1.z-b1.z));
//V6
glTexCoord2d(1.0,0.0);glVertex3f(p1.x+a*(n1.x+b1.x),p1.y+a*(n1.y+b1.y),p1.z+a*(n1.z+b1.z));
//V7
glTexCoord2d(1.0,1.0);glVertex3f(p1.x+a*(-n1.x+b1.x),p1.y+a*(-n1.y+b1.y),p1.z+a*(-n1.z+b1.z));
//V8
glTexCoord2d(0.0,1.0);glVertex3f(p1.x+a*(-n1.x-b1.x),p1.y+a*(-n1.y-b1.y),p1.z+a*(-n1.z-b1.z));
//V1
glTexCoord2d(0.0,0.0);glVertex3f(p.x+a*(n.x-b.x),p.y+a*(n.y-b.y),p.z+a*(n.z-b.z));
//V4
glTexCoord2d(0.0,1.0);glVertex3f(p.x+a*(-n.x-b.x),p.y+a*(-n.y-b.y),p.z+a*(-n.z-b.z));
//V8
glTexCoord2d(0.0,1.0);glVertex3f(p1.x+a*(-n1.x-b1.x),p1.y+a*(-n1.y-b1.y),p1.z+a*(-n1.z-b1.z));
//V5
glTexCoord2d(0.0,0.0);glVertex3f(p1.x+a*(n1.x-b1.x),p1.y+a*(n1.y-b1.y),p1.z+a*(n1.z-b1.z));
//V3
glTexCoord2d(1.0,1.0);glVertex3f(p.x+a*(-n.x+b.x),p.y+a*(-n.y+b.y),p.z+a*(-n.z+b.z));
//V4
glTexCoord2d(0.0,1.0);glVertex3f(p.x+a*(-n.x-b.x),p.y+a*(-n.y-b.y),p.z+a*(-n.z-b.z));
//V8
glTexCoord2d(0.0,1.0);glVertex3f(p1.x+a*(-n1.x-b1.x),p1.y+a*(-n1.y-b1.y),p1.z+a*(-n1.z-b1.z));
//V7
glTexCoord2d(1.0,1.0);glVertex3f(p1.x+a*(-n1.x+b1.x),p1.y+a*(-n1.y+b1.y),p1.z+a*(-n1.z+b1.z));
//V2
glTexCoord2d(1.0,0.0);glVertex3f(p.x+a*(n.x+b.x),p.y+a*(n.y+b.y),p.z+a*(n.z+b.z));
//V3
glTexCoord2d(1.0,1.0);glVertex3f(p.x+a*(-n.x+b.x),p.y+a*(-n.y+b.y),p.z+a*(-n.z+b.z));
//V7
glTexCoord2d(1.0,1.0);glVertex3f(p1.x+a*(-n1.x+b1.x),p1.y+a*(-n1.y+b1.y),p1.z+a*(-n1.z+b1.z));
//V6
glTexCoord2d(1.0,0.0);glVertex3f(p1.x+a*(n1.x+b1.x),p1.y+a*(n1.y+b1.y),p1.z+a*(n1.z+b1.z));
//V1
glTexCoord2d(0.0,0.0);glVertex3f(p.x+a*(n.x-b.x),p.y+a*(n.y-b.y),p.z+a*(n.z-b.z));
//V2
glTexCoord2d(1.0,0.0);glVertex3f(p.x+a*(n.x+b.x),p.y+a*(n.y+b.y),p.z+a*(n.z+b.z));
//V6
glTexCoord2d(1.0,0.0);glVertex3f(p1.x+a*(n1.x+b1.x),p1.y+a*(n1.y+b1.y),p1.z+a*(n1.z+b1.z));
//V5
glTexCoord2d(0.0,0.0);glVertex3f(p1.x+a*(n1.x-b1.x),p1.y+a*(n1.y-b1.y),p1.z+a*(n1.z-b1.z));
}
}
}
glEnd();
}
glDisable(GL_TEXTURE_2D);
}
