107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
// -*-C++-*-
|
|
|
|
uniform float eyerel_x1;
|
|
uniform float eyerel_y1;
|
|
uniform float eyerel_z1;
|
|
uniform float lightspot_r1;
|
|
uniform float lightspot_g1;
|
|
uniform float lightspot_b1;
|
|
uniform float eyerel_x2;
|
|
uniform float eyerel_y2;
|
|
uniform float eyerel_z2;
|
|
uniform float lightspot_r2;
|
|
uniform float lightspot_g2;
|
|
uniform float lightspot_b2;
|
|
uniform float eyerel_x3;
|
|
uniform float eyerel_y3;
|
|
uniform float eyerel_z3;
|
|
uniform float lightspot_r3;
|
|
uniform float lightspot_g3;
|
|
uniform float lightspot_b3;
|
|
uniform float eyerel_x4;
|
|
uniform float eyerel_y4;
|
|
uniform float eyerel_z4;
|
|
uniform float lightspot_r4;
|
|
uniform float lightspot_g4;
|
|
uniform float lightspot_b4;
|
|
uniform float eyerel_x5;
|
|
uniform float eyerel_y5;
|
|
uniform float eyerel_z5;
|
|
uniform float lightspot_r5;
|
|
uniform float lightspot_g5;
|
|
uniform float lightspot_b5;
|
|
uniform float lightspot_project1;
|
|
uniform float lightspot_project2;
|
|
uniform float lightspot_dir1;
|
|
uniform float lightspot_dir2;
|
|
uniform float lightspot_size1;
|
|
uniform float lightspot_size2;
|
|
uniform float lightspot_size3;
|
|
uniform float lightspot_size4;
|
|
uniform float lightspot_size5;
|
|
|
|
uniform int num_lightspots;
|
|
|
|
vec3 lightspot(vec3 relPos)
|
|
{
|
|
|
|
|
|
if (num_lightspots == 0)
|
|
{
|
|
return vec3 (0.0, 0.0, 0.0);
|
|
}
|
|
|
|
// first projectable spot
|
|
|
|
vec3 eye_rel = vec3 (eyerel_x1, eyerel_y1, eyerel_z1);
|
|
vec3 difference_vec = relPos - eye_rel;
|
|
|
|
mat2 rotMat = mat2 (cos(lightspot_dir1), sin(lightspot_dir1), -sin(lightspot_dir1), cos(lightspot_dir1));
|
|
|
|
difference_vec.xy = rotMat * difference_vec.xy;
|
|
difference_vec.x/= (1.0 + lightspot_project1);
|
|
|
|
float lightspot_arg = (1.0 - smoothstep(lightspot_size1/3.0, lightspot_size1, length(difference_vec))) * (1.0 - 0.5* smoothstep(lightspot_size1/3.0, lightspot_size1/(1.0+lightspot_project1), difference_vec.x));
|
|
|
|
vec3 lightspot_color = vec3 (lightspot_r1,lightspot_g1, lightspot_b1 ) * lightspot_arg;
|
|
|
|
// second projectable spot
|
|
|
|
eye_rel = vec3 (eyerel_x2, eyerel_y2, eyerel_z2);
|
|
difference_vec = relPos - eye_rel;
|
|
|
|
rotMat = mat2 (cos(lightspot_dir2), sin(lightspot_dir2), -sin(lightspot_dir2), cos(lightspot_dir2));
|
|
|
|
difference_vec.xy = rotMat * difference_vec.xy;
|
|
difference_vec.x/= (1.0 + lightspot_project2);
|
|
|
|
lightspot_arg = (1.0 - smoothstep(lightspot_size2/3.0, lightspot_size2, length(relPos - eye_rel)));
|
|
|
|
lightspot_color += vec3 (lightspot_r2,lightspot_g2, lightspot_b2 ) * lightspot_arg;
|
|
|
|
if (num_lightspots < 3)
|
|
{
|
|
return lightspot_color ;
|
|
}
|
|
|
|
// spherical spot
|
|
|
|
eye_rel = vec3 (eyerel_x3, eyerel_y3, eyerel_z3);
|
|
lightspot_arg = (1.0 - smoothstep(lightspot_size3/3.0, lightspot_size3, length(relPos - eye_rel)));
|
|
lightspot_color += vec3 (lightspot_r3,lightspot_g3, lightspot_b3 ) * lightspot_arg;
|
|
|
|
// spherical spot
|
|
|
|
eye_rel = vec3 (eyerel_x4, eyerel_y4, eyerel_z4);
|
|
lightspot_arg = (1.0 - smoothstep(lightspot_size4/3.0, lightspot_size4, length(relPos - eye_rel)));
|
|
lightspot_color += vec3 (lightspot_r4,lightspot_g4, lightspot_b4 ) * lightspot_arg;
|
|
|
|
// spherical spot
|
|
|
|
eye_rel = vec3 (eyerel_x5, eyerel_y5, eyerel_z5);
|
|
lightspot_arg = (1.0 - smoothstep(lightspot_size5/3.0, lightspot_size5, length(relPos - eye_rel)));
|
|
lightspot_color += vec3 (lightspot_r5,lightspot_g5, lightspot_b5 ) * lightspot_arg;
|
|
|
|
return lightspot_color;
|
|
|
|
}
|