mitchellhansen/voxel-raycaster
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tweaked some groovy color effects, updated screeny. I think I might have added fog in this one too?

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MitchellHansen
2016-11-29 23:44:03 -08:00
parent 259f6a8488
commit c98adefa3a
5 changed files with 31 additions and 19 deletions
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33
kernels/ray_caster_kernel.cl
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@@ -84,7 +84,8 @@ __kernel void raycaster(
global float3* cam_pos,
global float* lights,
global int* light_count,
__write_only image2d_t image
__write_only image2d_t image,
global int* seed
){
size_t id = get_global_id(0);
@@ -138,15 +139,19 @@ __kernel void raycaster(
}
// use a ghetto ass rng to give rays a "fog" appearance
int2 randoms = { 3, 14 };
uint seed = randoms.x + id;
uint t = seed ^ (seed << 11);
int2 randoms = { seed, ray_dir.y };
uint tseed = randoms.x + id;
uint t = tseed ^ (tseed << 11);
uint result = randoms.y ^ (randoms.y >> 19) ^ (t ^ (t >> 8));
*seed = result % 50;
int max_dist = 800 + result % 50;
int max_dist = 800 + result % 100;
int dist = 0;
int3 mask = { 0, 0, 0 };
float4 color = { 0.73, 0.81, 0.89, 0.6 };
float4 c = (float4)(0.40, 0.00, 0.40, 0.2);
c.x += ray_dir.y;// (result % 100) / 100;
// Andrew Woo's raycasting algo
do {
@@ -160,14 +165,14 @@ __kernel void raycaster(
int3 undershoot = voxel > 0;
if (overshoot.x == 0 || overshoot.y == 0 || overshoot.z == 0 || undershoot.x == 0 || undershoot.y == 0){
write_imagef(image, pixel, (float4)(.73, .81, .89, 1.0));
write_imagef(image, pixel, white_light(mix(color, (float4)(0.40, 0.00, 0.40, 0.2), 1.0 - max(dist / 700.0f, (float)0)), (float3)(lights[7], lights[8], lights[9]), mask));
return;
}
if (undershoot.z == 0) {
write_imagef(image, pixel, (float4)(.14, .30, .50, 1.0));
write_imagef(image, pixel, white_light(mix(color, (float4)(0.40, 0.00, 0.40, 0.2), 1.0 - max(dist / 700.0f, (float)0)), (float3)(lights[7], lights[8], lights[9]), mask));
return;
}
// If we hit a voxel
//int index = voxel.x * (*map_dim).y * (*map_dim).z + voxel.z * (*map_dim).z + voxel.y;
// Why the off by one on voxel.y?
@@ -189,9 +194,9 @@ __kernel void raycaster(
write_imagef(image, pixel, (float4)(.25, .00, .25, 1.00));
return;
case 5:
//write_imagef(image, pixel, (float4)(.00, .00, + 0.5, 1.00));
write_imagef(image, pixel, white_light((float4)(0.40, 0.00, 0.40, 0.2), (float3)(lights[7], lights[8], lights[9]), mask));
//write_imagef(image, pixel, (float4)(0.40, 0.00, 0.40, 0.2));
write_imagef(image, pixel, white_light(mix(color, c, 1.0 - max((dist/700.0f) - 0.3f, (float)0)), (float3)(lights[7], lights[8], lights[9]), mask));
return;
float3 vox = convert_float3(voxel);
@@ -221,8 +226,10 @@ __kernel void raycaster(
}
dist++;
} while (dist < max_dist);
write_imagef(image, pixel, (float4)(.73, .81, .89, 1.0));
} while (dist / 700.0f < 1);
//dist < max_dist
write_imagef(image, pixel, white_light(mix(color, (float4)(0.40, 0.00, 0.40, 0.2), 1.0 - max(dist / 700.0f, (float)0)), (float3)(lights[7], lights[8], lights[9]), mask));
//write_imagef(image, pixel, (float4)(.73, .81, .89, 1.0));
return;
}