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change signature of refraction to let caller know if refraction occurs or not

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Recep Aslantas
2024-03-24 06:31:29 +03:00
parent 707bff021c
commit aad5223da0
18 changed files with 138 additions and 99 deletions
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13
test/src/test_vec2.h
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@@ -785,35 +785,40 @@ TEST_IMPL(GLM_PREFIX, vec2_refract) {
vec2 N = {0.0f, 1.0f}; /* Surface normal */
vec2 dest;
float eta;
float r;
/* Water to Air (eta = 1.33/1.0) */
eta = 1.33f / 1.0f;
GLM(vec2_refract)(I, N, eta, dest);
r = GLM(vec2_refract)(I, N, eta, dest);
// In 2D, we expect a similar bending behavior as in 3D, so we check dest[1]
if (!(dest[0] == 0.0f && dest[1] == 0.0f)) {
ASSERT(dest[1] < -sqrtf(0.5f)); // Refracted ray bends away from the normal
ASSERT(r == true);
} else {
ASSERT(dest[0] == 0.0f && dest[1] == 0.0f); // Total internal reflection
ASSERT(r == false);
}
/* Air to Glass (eta = 1.0 / 1.5) */
eta = 1.0f / 1.5f;
GLM(vec2_refract)(I, N, eta, dest);
r = GLM(vec2_refract)(I, N, eta, dest);
ASSERT(dest[1] < -sqrtf(0.5f)); // Expect bending towards the normal
/* Glass to Water (eta = 1.5 / 1.33) */
eta = 1.5f / 1.33f;
GLM(vec2_refract)(I, N, eta, dest);
r = GLM(vec2_refract)(I, N, eta, dest);
ASSERT(dest[1] < -sqrtf(0.5f)); // Expect bending towards the normal, less bending than air to glass
/* Diamond to Air (eta = 2.42 / 1.0) */
eta = 2.42f / 1.0f;
GLM(vec2_refract)(I, N, eta, dest);
r = GLM(vec2_refract)(I, N, eta, dest);
if (!(dest[0] == 0.0f && dest[1] == 0.0f)) {
/* High potential for total internal reflection, but if it occurs, expect significant bending */
ASSERT(dest[1] < -sqrtf(0.5f));
ASSERT(r == true);
} else {
ASSERT(dest[0] == 0.0f && dest[1] == 0.0f); // Total internal reflection
ASSERT(r == false);
}
TEST_SUCCESS

13
test/src/test_vec3.h
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@@ -1890,38 +1890,43 @@ TEST_IMPL(GLM_PREFIX, vec3_refract) {
vec3 N = {0.0f, 1.0f, 0.0f}; /* Surface normal */
vec3 dest;
float eta;
bool r;
/* Water to Air (eta = 1.33/1.0) */
eta = 1.33f / 1.0f;
GLM(vec3_refract)(I, N, eta, dest);
r = GLM(vec3_refract)(I, N, eta, dest);
if (!(dest[0] == 0.0f && dest[1] == 0.0f && dest[2] == 0.0f)) {
ASSERT(dest[1] < -sqrtf(0.5f));
ASSERT(r == true);
} else {
ASSERT(dest[0] == 0.0f && dest[1] == 0.0f && dest[2] == 0.0f);
ASSERT(r == false);
}
/* Air to Glass (eta = 1.0 / 1.5) */
eta = 1.0f / 1.5f;
GLM(vec3_refract)(I, N, eta, dest);
r = GLM(vec3_refract)(I, N, eta, dest);
/* Expect bending towards the normal */
ASSERT(dest[1] < -sqrtf(0.5f));
/* Glass to Water (eta = 1.5 / 1.33) */
eta = 1.5f / 1.33f;
GLM(vec3_refract)(I, N, eta, dest);
r = GLM(vec3_refract)(I, N, eta, dest);
/* Expect bending towards the normal, less bending than air to glass */
ASSERT(dest[1] < -sqrtf(0.5f));
/* Diamond to Air (eta = 2.42 / 1.0) */
eta = 2.42f / 1.0f;
GLM(vec3_refract)(I, N, eta, dest);
r = GLM(vec3_refract)(I, N, eta, dest);
if (!(dest[0] == 0.0f && dest[1] == 0.0f && dest[2] == 0.0f)) {
/* High potential for total internal reflection, but if it occurs, expect significant bending */
ASSERT(dest[1] < -sqrtf(0.5f));
ASSERT(r == true);
} else {
ASSERT(dest[0] == 0.0f && dest[1] == 0.0f && dest[2] == 0.0f);
ASSERT(r == false);
}
TEST_SUCCESS

9
test/src/test_vec4.h
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@@ -1575,10 +1575,11 @@ TEST_IMPL(GLM_PREFIX, vec4_refract) {
vec4 N = {0.0f, 1.0f, 0.0f, 0.0f}; /* Surface normal */
vec4 dest;
float eta;
float r;
/* Water to Air (eta = 1.33/1.0) */
eta = 1.33f / 1.0f;
GLM(vec4_refract)(I, N, eta, dest);
r = GLM(vec4_refract)(I, N, eta, dest);
if (!(dest[0] == 0.0f && dest[1] == 0.0f && dest[2] == 0.0f && dest[3] == 0.0f)) {
ASSERT(dest[1] < -sqrtf(0.5f));
} else {
@@ -1587,17 +1588,17 @@ TEST_IMPL(GLM_PREFIX, vec4_refract) {
/* Air to Glass (eta = 1.0 / 1.5) */
eta = 1.0f / 1.5f;
GLM(vec4_refract)(I, N, eta, dest);
r = GLM(vec4_refract)(I, N, eta, dest);
ASSERT(dest[1] < -sqrtf(0.5f)); // Expect bending towards the normal
/* Glass to Water (eta = 1.5 / 1.33) */
eta = 1.5f / 1.33f;
GLM(vec4_refract)(I, N, eta, dest);
r = GLM(vec4_refract)(I, N, eta, dest);
ASSERT(dest[1] < -sqrtf(0.5f)); // Expect bending towards the normal, less bending than air to glass
/* Diamond to Air (eta = 2.42 / 1.0) */
eta = 2.42f / 1.0f;
GLM(vec4_refract)(I, N, eta, dest);
r = GLM(vec4_refract)(I, N, eta, dest);
if (!(dest[0] == 0.0f && dest[1] == 0.0f && dest[2] == 0.0f && dest[3] == 0.0f)) {
/* High potential for total internal reflection, but if it occurs, expect significant bending */
ASSERT(dest[1] < -sqrtf(0.5f));