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+ | Better bouncing

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TheRedShip
2025-03-04 21:15:04 +01:00
committed by tomoron
parent 507b8fef04
commit ecc1f68329
3 changed files with 23 additions and 14 deletions
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31
shaders/light.glsl
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@ -2,7 +2,7 @@ hitInfo traceRay(inout Ray ray);
vec3 GetEnvironmentLight(Ray ray)
{
return vec3(0.);
// return vec3(0.);
vec3 sun_pos = vec3(-0.5, 0.5, 0.5);
float SunFocus = 1.5;
float SunIntensity = 1.;
@ -37,17 +37,26 @@ vec3 sampleSphereLight(vec3 position, GPUObject obj, int light_index, GPUMateria
Ray shadow_ray = Ray(position + light_dir * 0.001, light_dir, (1.0 / light_dir));
hitInfo shadow_hit = traceRay(shadow_ray);
vec3 dir = normalize(vec3(-0.5, 0.2, 0.));
vec3 dir = normalize(vec3(-0.5, 0.15, 0.));
if (dot(shadow_ray.direction, dir) < 0.995 || shadow_hit.obj_index != light_index)
{
theta = 2.0 * M_PI * randomValue(rng_state);
phi = acos(2.0 * randomValue(rng_state) - 1.0);
sample_point = obj.position + tan(acos(0.995)) * light_dist * vec3(
sin(phi) * cos(theta),
sin(phi) * sin(theta),
cos(phi)
);
float circleRadius = light_dist * tan(acos(0.995));
// Uniformly sample a point in a disk.
float r = circleRadius * sqrt(randomValue(rng_state));
float theta = 2.0 * M_PI * randomValue(rng_state);
vec2 diskSample = vec2(r * cos(theta), r * sin(theta));
// Build an orthonormal basis for the plane perpendicular to 'dir'.
vec3 up = abs(dir.y) < 0.99 ? vec3(0, 1, 0) : vec3(1, 0, 0);
vec3 tangent = normalize(cross(up, dir));
vec3 bitangent = cross(dir, tangent);
// Determine the center of the projected circle on the wall.
vec3 circleCenter = obj.position + light_dist * dir;
// Compute the final sample point on the projected circle.
vec3 sample_point = circleCenter + diskSample.x * tangent + diskSample.y * bitangent;
Ray light_ray = Ray(sample_point, -dir, (1.0 / -dir));
hitInfo light_ray_hit = traceRay(light_ray);
@ -66,6 +75,8 @@ vec3 sampleSphereLight(vec3 position, GPUObject obj, int light_index, GPUMateria
if (dot(reflect_ray.direction, reflect_to_particle) < 0.995)
return vec3(0.0);
mat.color *= light_ray_mat.color;
return mat.emission * mat.color * vec3(10.0);
}
float cos_theta = max(0.0, -dot(light_dir, normalize(sample_point - obj.position)));