Shader description files

Coming soon.

Notes:

  • Extention .cl (not OpenCL files, but to use syntax highlighting e.g. in spyder) …

  • RGB(A) color values (tuples) in ShaderParamNames must contain RGB (or rgb) to enable QDS scaling the colors to the set color mode.

This is an example shader description file:

//#QDS ShaderName          =SINE_WAVE_GRATING
//#QDS ShaderParamNames    =perLen_um; perDur_s; minRGB; maxRGB
//#QDS ShaderParamLengths  =1;1;4;4
//#QDS ShaderParamDefaults =0.0; 1.0; (0,0,0,255); (255,255,255,255)
//
//#QDS ShaderVertexStart
// ----------------------------------------------------------------------
void main()
{
  gl_Position    = ftransform();
}
// ----------------------------------------------------------------------
//#QDS ShaderVertexEnd

//#QDS ShaderFragmentStart
// ----------------------------------------------------------------------
#define pi    3.141592653589
#define pi2   6.283185307179

out    vec4   FragColor;

uniform float time_s;
uniform vec3  obj_xy_rot;
uniform float perLen_um;
uniform float perDur_s;
uniform vec4  minRGB;
uniform vec4  maxRGB;

float         inten;
vec4          b;

void main() {
  vec4  a     = gl_FragCoord;
  a.x         = a.x -obj_xy_rot.x;
  a.y         = a.y -obj_xy_rot.y;
  b.x         = a.x*cos(obj_xy_rot[2]) -a.y*sin(obj_xy_rot[2]);
  b.y         = a.y*cos(obj_xy_rot[2]) +a.x*sin(obj_xy_rot[2]);
  inten       = (sin(((b.x)/perLen_um +time_s/perDur_s) *pi2) +1.0)/2.0;
  FragColor   = mix(minRGB, maxRGB, inten);
}
// ----------------------------------------------------------------------
//#QDS ShaderFragmentEnd