Warning, /eic-opticks/sysrap/gl/rec_line_strip/geom.glsl is written in an unsupported language. File is not indexed.
0001 #version 410 core
0002
0003 // based on oglrap/gl/altrec/geom.glsl
0004
0005 uniform mat4 ModelViewProjection ;
0006 uniform vec4 Param ;
0007
0008 layout (lines) in;
0009 layout (line_strip, max_vertices = 2) out;
0010
0011 out vec4 fcolor ;
0012
0013
0014 void main ()
0015 {
0016 vec4 p0 = gl_in[0].gl_Position ;
0017 vec4 p1 = gl_in[1].gl_Position ;
0018 // two consequtive record positions with propagation times in .w
0019
0020 float tc = Param.w ;
0021
0022 uint valid = (uint(p0.w > 0.) << 0) + (uint(p1.w > 0.) << 1) + (uint(p1.w > p0.w) << 2) ;
0023 // valid : times > 0. and ordered correctly (no consideration of tc, input time Param.w)
0024 // permitting zero causes "future kink" issue
0025
0026 uint select = (uint(tc > p0.w ) << 0) + (uint(tc < p1.w) << 1) + (0x1 << 2 ) ;
0027 // select : input time Param tc is between the two point times
0028
0029 uint valid_select = valid & select ;
0030 // bitwise combination
0031
0032 fcolor = vec4(1.0,1.0,1.0,1.0) ; ;
0033
0034 if(valid_select == 0x7) // both points valid and with tc inbetween the points, so can mix to get position
0035 {
0036 gl_Position = ModelViewProjection * vec4(vec3(p0), 1.0) ;
0037 EmitVertex();
0038
0039 vec3 pt = mix( vec3(p0), vec3(p1), (tc - p0.w)/(p1.w - p0.w) );
0040 gl_Position = ModelViewProjection * vec4( pt, 1.0 ) ;
0041 EmitVertex();
0042 }
0043 else if( valid == 0x7 && select == 0x5 ) // both points valid, but time is beyond them both
0044 {
0045 gl_Position = ModelViewProjection * vec4( vec3(p0), 1.0 ) ;
0046 EmitVertex();
0047
0048 gl_Position = ModelViewProjection * vec4( vec3(p1), 1.0 ) ;
0049 EmitVertex();
0050 }
0051 EndPrimitive(); // MAYBE DO THIS INSIDE THE BRACKET ?
0052 }
0053
0054
