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123 lines
4.3 KiB
HTML
123 lines
4.3 KiB
HTML
<!DOCTYPE html>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/webxr_test_constants.js"></script>
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<script src="resources/webxr_test_asserts.js"></script>
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<script>
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// |matrix| - Float32Array, |input| - point-like dict (must have x, y, z, w)
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let transform_point = function (matrix, input) {
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return {
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x : matrix[0] * input.x + matrix[4] * input.y + matrix[8] * input.z + matrix[12] * input.w,
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y : matrix[1] * input.x + matrix[5] * input.y + matrix[9] * input.z + matrix[13] * input.w,
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z : matrix[2] * input.x + matrix[6] * input.y + matrix[10] * input.z + matrix[14] * input.w,
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w : matrix[3] * input.x + matrix[7] * input.y + matrix[11] * input.z + matrix[15] * input.w,
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};
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}
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// |point| - point-like dict (must have x, y, z, w)
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let normalize_perspective = function(point) {
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if(point.w == 0 || point.w == 1) return point;
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return {
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x : point.x / point.w,
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y : point.y / point.w,
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z : point.z / point.w,
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w : 1
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};
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}
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let matrix_tests_name = "XRRay matrix works";
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let matrix_tests = function() {
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// Matrix tests for XRRay.
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// Spec: https://immersive-web.github.io/webxr/#xrray-interface
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const initialOrigin = {x : 0, y : 0, z : 0, w : 1};
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const initialDirection = {x : 0, y : 0, z : -1, w : 0};
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// Test 1. Simple translation and rotation.
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{
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let originDict = {x : 10.0, y : 10.0, z : 10.0, w : 1.0};
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let directionDict = {x : 10.0, y : 0.0, z : 0.0, w : 0.0};
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let directionNorm = {x : 1.0, y : 0.0, z : 0.0, w : 0.0};
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let xrRay = new XRRay(
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DOMPoint.fromPoint(originDict),
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DOMPoint.fromPoint(directionDict));
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let transformedOrigin = normalize_perspective(transform_point(xrRay.matrix, initialOrigin));
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let transformedDirection = normalize_perspective(transform_point(xrRay.matrix, initialDirection));
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assert_point_approx_equals(
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originDict, transformedOrigin,
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FLOAT_EPSILON, "origin-test1:");
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assert_point_approx_equals(
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directionNorm, transformedDirection,
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FLOAT_EPSILON, "direction-test1:");
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}
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// Test 2. Co-linear direction - rotation by 180 deg.
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{
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let originDict = {x : 10.0, y : 10.0, z : 10.0, w : 1.0};
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let directionDict = {x : 0.0, y : 0.0, z : 1.0, w : 0.0};
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let directionNorm = {x : 0.0, y : 0.0, z : 1.0, w : 0.0};
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let xrRay = new XRRay(
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DOMPoint.fromPoint(originDict),
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DOMPoint.fromPoint(directionDict));
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let transformedOrigin = normalize_perspective(transform_point(xrRay.matrix, initialOrigin));
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let transformedDirection = normalize_perspective(transform_point(xrRay.matrix, initialDirection));
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assert_point_approx_equals(
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originDict, transformedOrigin,
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FLOAT_EPSILON, "origin-test2:");
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assert_point_approx_equals(
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directionNorm, transformedDirection,
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FLOAT_EPSILON, "direction-test2:");
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}
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// Test 3. No translation.
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{
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let originDict = {x : 0.0, y : 0.0, z : 0.0, w : 1.0};
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let directionDict = {x : 10.0, y : 0.0, z : 0.0, w : 0.0};
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let directionNorm = {x : 1.0, y : 0.0, z : 0.0, w : 0.0};
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let xrRay = new XRRay(
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DOMPoint.fromPoint(originDict),
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DOMPoint.fromPoint(directionDict));
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let transformedOrigin = normalize_perspective(transform_point(xrRay.matrix, initialOrigin));
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let transformedDirection = normalize_perspective(transform_point(xrRay.matrix, initialDirection));
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assert_point_approx_equals(
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originDict, transformedOrigin,
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FLOAT_EPSILON, "origin-test3:");
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assert_point_approx_equals(
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directionNorm, transformedDirection,
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FLOAT_EPSILON, "direction-test3:");
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}
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// Test 4. No rotation.
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{
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let originDict = {x : 10.0, y : 10.0, z : 10.0, w : 1.0};
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let directionDict = {x : 0.0, y : 0.0, z : -1.0, w : 0.0};
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let directionNorm = {x : 0.0, y : 0.0, z : -1.0, w : 0.0};
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let xrRay = new XRRay(
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DOMPoint.fromPoint(originDict),
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DOMPoint.fromPoint(directionDict));
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let transformedOrigin = normalize_perspective(transform_point(xrRay.matrix, initialOrigin));
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let transformedDirection = normalize_perspective(transform_point(xrRay.matrix, initialDirection));
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assert_point_approx_equals(
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originDict, transformedOrigin,
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FLOAT_EPSILON, "origin-test4:");
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assert_point_approx_equals(
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directionNorm, transformedDirection,
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FLOAT_EPSILON, "direction-test4:");
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}
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};
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test(matrix_tests, matrix_tests_name);
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</script>
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