ZGameEditor forum

Code: Select all

void main()
{
  vec4 vertex = gl_Vertex;
  vertex.xy *= 2.0;
  gl_Position = vertex;
  gl_TexCoord[0] = gl_MultiTexCoord0;
}

Code: Select all

uniform sampler2D tex1;
uniform float scale,px,py,Alpha;
uniform vec3 rot;
uniform float width,height;

#define PI 3.141592653589793

mat3 getrot(vec3 r)
{
   float cx = cos(radians(r.x));
   float sx = sin(radians(r.x));
   float cy = cos(radians(r.y));
   float sy = sin(radians(r.y));
   float cz = cos(radians(r.z));
   float sz = sin(radians(r.z));

   float m1,m2,m3,m4,m5,m6,m7,m8,m9;

   m1=cy*cz;
   m2=cx*sz+sx*sy*cz;
   m3=sx*sz-cx*sy*cz;
   m4=-cy*sz;
   m5=cx*cz-sx*sy*sz;
   m6=sx*cz+cx*sy*sz;
   m7=sy;
   m8=-sx*cy;
   m9=cx*cy;

   return mat3(m1,m2,m3,m4,m5,m6,m7,m8,m9);
}


void main(){
  mat3 t=getrot(rot);
  vec2 rads = vec2(PI*2.0 , PI);
  vec2 offset=vec2(px,py);
  vec2 pnt = (gl_TexCoord[0] - .5-offset).xy*vec2(scale, scale*height/width);
  // Project to Sphere
  float x2y2 = pnt.x * pnt.x + pnt.y * pnt.y;
  vec3 sphere_pnt = vec3(2. * pnt, x2y2 - 1.0) / (x2y2 + 1.0);
  sphere_pnt *= t;

  // Convert to Spherical Coordinates
  float r = length(sphere_pnt);
  float lon = atan(sphere_pnt.y, sphere_pnt.x);
  float lat = acos(sphere_pnt.z / r);

  gl_FragColor = texture2D(tex1, vec2(lon, lat) / rads);
  gl_FragColor *=Alpha;
}