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modulo is implemented incorrectly by the shader language

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Quaternions 2023-09-01 00:02:50 -07:00
parent 7179f20e67
commit ce5f6fceb9
1 changed files with 13 additions and 1 deletions
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14
src/shader.wgsl
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@ -101,8 +101,20 @@ fn fs_entity(vertex: EntityOutput) -> @location(0) vec4<f32> {
return vec4<f32>(vec3<f32>(0.1) + 0.5 * reflected_color, 1.0); return vec4<f32>(vec3<f32>(0.1) + 0.5 * reflected_color, 1.0);
} }
fn modulo_euclidean (a: f32, b: f32) -> f32 {
var m = a % b;
if (m < 0.0) {
if (b < 0.0) {
m -= b;
} else {
m += b;
}
}
return m;
}
@fragment @fragment
fn fs_ground(vertex: GroundOutput) -> @location(0) vec4<f32> { fn fs_ground(vertex: GroundOutput) -> @location(0) vec4<f32> {
let dir = vec3<f32>(-1.0)+vec3<f32>(vertex.pos.x/16.%1.0,0.0,vertex.pos.z/16.%1.0)*2.0; let dir = vec3<f32>(-1.0)+vec3<f32>(modulo_euclidean(vertex.pos.x/16.,1.0),0.0,modulo_euclidean(vertex.pos.z/16.,1.0))*2.0;
return vec4<f32>(textureSample(r_texture, r_sampler, dir).rgb, 1.0); return vec4<f32>(textureSample(r_texture, r_sampler, dir).rgb, 1.0);
} }