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Ray-caster: remove hard-coded test construction

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This commit is contained in:
Aaron Fenyes 2024-08-26 13:51:01 -07:00
parent cbec31f5df
commit bf140efaf7
2 changed files with 11 additions and 33 deletions
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32
app-proto/inversive-display/src/inversive.frag
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@ -40,7 +40,7 @@ uniform vec2 radius;
uniform float opacity;
uniform float highlight;
uniform int layer_threshold;
uniform bool use_test_construction;
uniform bool test_mode;
// light and camera
const float focal_slope = 0.3;
@ -134,40 +134,18 @@ void main() {
vec2 scr = (2.*gl_FragCoord.xy - resolution) / shortdim;
vec3 dir = vec3(focal_slope * scr, -1.);
// initialize two spheres
vecInv sphere_list_internal [SPHERE_MAX];
vec3 color_list_internal [SPHERE_MAX];
if (use_test_construction) {
/* DEBUG */
// spheres 0 and 1 are identical in the test construction hard-coded
// here and the construction passed in through uniforms. sphere 2 has
// a different radius in the construction; we can use that to show that
// the switch is working
sphere_list_internal[0] = sphere(vec3(0.5, 0.5, -5. + ctrl.x), radius.x);
sphere_list_internal[1] = sphere(vec3(-0.5, -0.5, -5. + ctrl.y), radius.y);
sphere_list_internal[2] = sphere(vec3(-0.5, 0.5, -5.), 0.5);
color_list_internal[0] = vec3(1., 0.25, 0.);
color_list_internal[1] = vec3(0., 0.25, 1.);
color_list_internal[2] = vec3(0.25, 0., 1.0);
} else {
for (int i = 0; i < sphere_cnt; ++i) {
sphere_list_internal[i] = sphere_list[i];
color_list_internal[i] = color_list[i];
}
}
// cast rays through the spheres
vec2 depth_pairs [SPHERE_MAX];
taggedFrag frags [2*SPHERE_MAX];
int frag_cnt = 0;
for (int i = 0; i < sphere_cnt; ++i) {
vec2 hit_depths = sphere_cast(sphere_list_internal[i], dir);
vec2 hit_depths = sphere_cast(sphere_list[i], dir);
if (!isnan(hit_depths[0])) {
frags[frag_cnt] = sphere_shading(sphere_list_internal[i], hit_depths[0] * dir, color_list_internal[i], i);
frags[frag_cnt] = sphere_shading(sphere_list[i], hit_depths[0] * dir, color_list[i], i);
++frag_cnt;
}
if (!isnan(hit_depths[1])) {
frags[frag_cnt] = sphere_shading(sphere_list_internal[i], hit_depths[1] * dir, color_list_internal[i], i);
frags[frag_cnt] = sphere_shading(sphere_list[i], hit_depths[1] * dir, color_list[i], i);
++frag_cnt;
}
}
@ -202,7 +180,7 @@ void main() {
// cusps
float cusp_cos = abs(dot(dir, frag0.normal));
float cusp_threshold = 2.*sqrt(ixn_threshold * sphere_list_internal[frag0.id].lt.s);
float cusp_threshold = 2.*sqrt(ixn_threshold * sphere_list[frag0.id].lt.s);
float cusp_highlight = highlight * (1. - smoothstep(2./3.*cusp_threshold, 1.5*cusp_threshold, cusp_cos));
frags[i].color = mix(frags[i].color, vec4(1.), cusp_highlight);
}