1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#include "math/sdf_shapes"
#include "math/sdf_utils"
fn get_dist(p: vec3<f32>, obj_params: vec4<f32>) -> f32 {
let obj_type = obj_params.x;
if (obj_type == 1.0) { return length(p) - 1.0; } // Unit Sphere
if (obj_type == 2.0) { return sdBox(p, vec3<f32>(1.0)); } // Unit Box
if (obj_type == 3.0) { return sdTorus(p, vec2<f32>(1.0, 0.4)); } // Unit Torus
if (obj_type == 4.0) { return sdPlane(p, vec3<f32>(0.0, 1.0, 0.0), 0.0); }
if (obj_type == 5.0) { return sdBox(p, obj_params.yzw); } // MESH AABB
return 100.0;
}
fn map_scene(p: vec3<f32>, skip_idx: u32) -> f32 {
var d = 1000.0;
let num_objects = arrayLength(&object_data.objects);
for (var i = 0u; i < num_objects; i++) {
if (i == skip_idx) { continue; }
let obj = object_data.objects[i];
let q = (obj.inv_model * vec4<f32>(p, 1.0)).xyz;
// Extract scale factors from the model matrix
let sx = length(obj.model[0].xyz);
let sy = length(obj.model[1].xyz);
let sz = length(obj.model[2].xyz);
var s = min(sx, min(sy, sz));
if (obj.params.x == 4.0) {
s = sy; // Plane normal is (0,1,0) in local space
}
d = min(d, get_dist(q, obj.params) * s);
}
return d;
}
|
