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export const description = `
Execution tests for the 'refract' builtin function
T is vecN<I>
I is AbstractFloat, f32, or f16
@const fn refract(e1: T ,e2: T ,e3: I ) -> T
For the incident vector e1 and surface normal e2, and the ratio of indices of
refraction e3, let k = 1.0 -e3*e3* (1.0 - dot(e2,e1) * dot(e2,e1)).
If k < 0.0, returns the refraction vector 0.0, otherwise return the refraction
vector e3*e1- (e3* dot(e2,e1) + sqrt(k)) *e2.
`;
import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';
import { f32, TypeF32, TypeVec, Vector } from '../../../../../util/conversion.js';
import { refractInterval } from '../../../../../util/f32_interval.js';
import { sparseVectorF32Range, quantizeToF32, sparseF32Range } from '../../../../../util/math.js';
import { makeCaseCache } from '../../case_cache.js';
import { allInputSources, Case, IntervalFilter, run } from '../../expression.js';
import { builtin } from './builtin.js';
export const g = makeTestGroup(GPUTest);
// Using a bespoke implementation of make*Case and generate*Cases here
// since refract is the only builtin with the API signature
// (vec, vec, scalar) -> vec
/**
* @returns a Case for `refract`
* @param i the `i` param for the case
* @param s the `s` param for the case
* @param r the `r` param for the case
* @param check what interval checking to apply
* */
function makeCaseF32(i: number[], s: number[], r: number, check: IntervalFilter): Case | undefined {
i = i.map(quantizeToF32);
s = s.map(quantizeToF32);
r = quantizeToF32(r);
const i_f32 = i.map(f32);
const s_f32 = s.map(f32);
const r_f32 = f32(r);
const vectors = refractInterval(i, s, r);
if (check === 'f32-only' && vectors.some(e => !e.isFinite())) {
return undefined;
}
return {
input: [new Vector(i_f32), new Vector(s_f32), r_f32],
expected: refractInterval(i, s, r),
};
}
/**
* @returns an array of Cases for `refract`
* @param param_is array of inputs to try for the `i` param
* @param param_ss array of inputs to try for the `s` param
* @param param_rs array of inputs to try for the `r` param
* @param check what interval checking to apply
*/
function generateCasesF32(
param_is: number[][],
param_ss: number[][],
param_rs: number[],
check: IntervalFilter
): Case[] {
// Cannot use `cartesianProduct` here due to heterogeneous param types
return param_is
.flatMap(i => {
return param_ss.flatMap(s => {
return param_rs.map(r => {
return makeCaseF32(i, s, r, check);
});
});
})
.filter((c): c is Case => c !== undefined);
}
export const d = makeCaseCache('refract', {
f32_vec2_const: () => {
return generateCasesF32(
sparseVectorF32Range(2),
sparseVectorF32Range(2),
sparseF32Range(),
'f32-only'
);
},
f32_vec2_non_const: () => {
return generateCasesF32(
sparseVectorF32Range(2),
sparseVectorF32Range(2),
sparseF32Range(),
'unfiltered'
);
},
f32_vec3_const: () => {
return generateCasesF32(
sparseVectorF32Range(3),
sparseVectorF32Range(3),
sparseF32Range(),
'f32-only'
);
},
f32_vec3_non_const: () => {
return generateCasesF32(
sparseVectorF32Range(3),
sparseVectorF32Range(3),
sparseF32Range(),
'unfiltered'
);
},
f32_vec4_const: () => {
return generateCasesF32(
sparseVectorF32Range(4),
sparseVectorF32Range(4),
sparseF32Range(),
'f32-only'
);
},
f32_vec4_non_const: () => {
return generateCasesF32(
sparseVectorF32Range(4),
sparseVectorF32Range(4),
sparseF32Range(),
'unfiltered'
);
},
});
g.test('abstract_float')
.specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
.desc(`abstract float tests`)
.params(u => u.combine('inputSource', allInputSources).combine('vectorize', [2, 3, 4] as const))
.unimplemented();
g.test('f32_vec2')
.specURL('https://www.w3.org/TR/WGSL/#numeric-builtin-functions')
.desc(`f32 tests using vec2s`)
.params(u => u.combine('inputSource', allInputSources))
.fn(async t => {
const cases = await d.get(
t.params.inputSource === 'const' ? 'f32_vec2_const' : 'f32_vec2_non_const'
);
await run(
t,
builtin('refract'),
[TypeVec(2, TypeF32), TypeVec(2, TypeF32), TypeF32],
TypeVec(2, TypeF32),
t.params,
cases
);
});
g.test('f32_vec3')
.specURL('https://www.w3.org/TR/WGSL/#numeric-builtin-functions')
.desc(`f32 tests using vec3s`)
.params(u => u.combine('inputSource', allInputSources))
.fn(async t => {
const cases = await d.get(
t.params.inputSource === 'const' ? 'f32_vec3_const' : 'f32_vec3_non_const'
);
await run(
t,
builtin('refract'),
[TypeVec(3, TypeF32), TypeVec(3, TypeF32), TypeF32],
TypeVec(3, TypeF32),
t.params,
cases
);
});
g.test('f32_vec4')
.specURL('https://www.w3.org/TR/WGSL/#numeric-builtin-functions')
.desc(`f32 tests using vec4s`)
.params(u => u.combine('inputSource', allInputSources))
.fn(async t => {
const cases = await d.get(
t.params.inputSource === 'const' ? 'f32_vec4_const' : 'f32_vec4_non_const'
);
await run(
t,
builtin('refract'),
[TypeVec(4, TypeF32), TypeVec(4, TypeF32), TypeF32],
TypeVec(4, TypeF32),
t.params,
cases
);
});
g.test('f16')
.specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
.desc(`f16 tests`)
.params(u => u.combine('inputSource', allInputSources).combine('vectorize', [2, 3, 4] as const))
.unimplemented();
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