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Add spherical mapping for UV Textures.

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Godzil
2020-03-04 13:20:15 +00:00
parent 5c10d65c8d
commit 3e37b5ca44
4 changed files with 222 additions and 1 deletions
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78
tests/pattern_test.cpp
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@@ -20,6 +20,7 @@
#include <material.h>
#include <uv_pattern.h>
#include <uv_checkers.h>
#include <texturemap.h>
#ifdef ENABLE_LUA_SUPPORT
extern "C" {
@@ -273,4 +274,81 @@ TEST(PatternTest, Checkers_pattern_in_2D)
ASSERT_EQ(checkers.uvPatternAt(0.0, 0.5), white);
ASSERT_EQ(checkers.uvPatternAt(0.5, 0.5), black);
ASSERT_EQ(checkers.uvPatternAt(1.0, 1.0), black);
}
TEST(PatternTest, Using_a_spherical_mapping_on_a_3d_point)
{
Point testList[] = {
Point( 0, 0, -1),
Point( 1, 0, 0),
Point( 0, 0, 1),
Point(-1, 0, 0),
Point( 0, 1, 0),
Point( 0, -1, 0),
Point(sqrt(2)/2, sqrt(2)/2, 0),
};
double testResults[][2] {
{0.0, 0.5},
{0.25, 0.5},
{0.5, 0.5},
{0.75, 0.5},
{0.5, 1.0},
{0.5, 0.0},
{0.25, 0.75},
};
int testCount = sizeof(testList)/sizeof((testList)[0]);
int i;
TextureMap tm = TextureMap(SPHERICAL_MAP, nullptr);
for(i = 0; i < testCount; i++)
{
double u, v;
tm.sphericalMap(testList[i], u, v);
ASSERT_TRUE(double_equal(u, testResults[i][0]));
ASSERT_TRUE(double_equal(v, testResults[i][1]));
}
}
TEST(PatternTest, Using_a_texture_map_with_a_spherical_map)
{
Point testList[] = {
Point( 0.4315, 0.4670, 0.7719),
Point( -0.9654, 0.2252, -0.0534),
Point( 0.1039, 0.7090, 0.6975),
Point( -0.4986, -0.7856, -0.3663),
Point( -0.0317, -0.9395, 0.3411),
Point( 0.4809, -0.7721, 0.4154),
Point( 0.0285, -0.9612, -0.2745),
Point( -0.5734, -0.2162, -0.7903),
Point( 0.7688, -0.1470, 0.6223),
Point( -0.7652, 0.2175, 0.6060),
};
Colour testResults[] {
white,
black,
white,
black,
black,
black,
black,
white,
black,
black,
};
int testCount = sizeof(testList)/sizeof((testList)[0]);
int i;
UVCheckers uvpat = UVCheckers(16, 8, black, white);
TextureMap tm = TextureMap(SPHERICAL_MAP, &uvpat);
for(i = 0; i < testCount; i++)
{
Colour ret = tm.patternAt(testList[i]);
EXPECT_EQ(ret, testResults[i]);
}
}