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paysages3d/src/tests/Clouds_Test.cpp

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#include "BaseTestCase.h"
#include <cmath>
#include "SoftwareRenderer.h"
#include "CloudLayerDefinition.h"
#include "NoiseGenerator.h"
#if 0
TEST(Clouds, Density)
{
/* Setup */
double x, y, z;
CloudLayerDefinition layer(NULL);
/* Test default coverage (empty) */
for (x = -10.0; x < 10.0; x += 10.0)
{
for (y = -10.0; y < 10.0; y += 10.0)
{
for (z = -10.0; z < 10.0; z += 10.0)
{
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, y, z)), 0.0);
}
}
}
/* Test coverage by altitude */
layer.base_coverage = 1.0;
layer.lower_altitude = -1.0;
layer.thickness = 2.0;
layer.validate();
layer.base_coverage = 1.0;
layer._coverage_noise->forceValue(1.0);
for (x = -10.0; x < 10.0; x += 10.0)
{
for (z = -10.0; z < 10.0; z += 10.0)
{
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 0.0, z)), 1.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 0.5, z)), 0.5);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 1.0, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 1.5, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -0.5, z)), 0.5);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -1.0, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -1.5, z)), 0.0);
}
}
layer.base_coverage = 0.5;
layer._coverage_noise->forceValue(1.0);
for (x = -10.0; x < 10.0; x += 10.0)
{
for (z = -10.0; z < 10.0; z += 10.0)
{
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 0.0, z)), 0.5);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 0.5, z)), 0.25);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 1.0, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 1.5, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -0.5, z)), 0.25);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -1.0, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -1.5, z)), 0.0);
}
}
layer.base_coverage = 1.0;
layer._coverage_noise->forceValue(0.5);
for (x = -10.0; x < 10.0; x += 10.0)
{
for (z = -10.0; z < 10.0; z += 10.0)
{
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 0.0, z)), 0.5);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 0.5, z)), 0.25);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 1.0, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, 1.5, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -0.5, z)), 0.25);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -1.0, z)), 0.0);
ASSERT_DOUBLE_EQ(cloudsGetLayerCoverage(&layer, v3(x, -1.5, z)), 0.0);
}
}
/* TODO Test fake renderer */
/* TODO Test real renderer */
}
TEST(Clouds, WalkingBoundaries)
{
Vector3 start, end;
int result;
CloudLayerDefinition layer(NULL);
layer.base_coverage = 1.0;
layer.lower_altitude = -1.0;
layer.thickness = 2.0;
layer.validate();
/* Basic cases */
start = v3(0.0, -3.0, 0.0);
end = v3(0.0, -2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, 2.0, 0.0);
end = v3(0.0, 3.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, -2.0, 0.0);
end = v3(0.0, 2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, -1.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 0.0, 1.0, 0.0);
start = v3(0.0, 0.0, 0.0);
end = v3(0.0, 2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, 0.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 0.0, 1.0, 0.0);
start = v3(0.0, -2.0, 0.0);
end = v3(0.0, 0.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, -1.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 0.0, 0.0, 0.0);
/* Basic cases (inverted) */
start = v3(0.0, -2.0, 0.0);
end = v3(0.0, -3.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, 3.0, 0.0);
end = v3(0.0, 2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, 2.0, 0.0);
end = v3(0.0, -2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, 1.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 0.0, -1.0, 0.0);
start = v3(0.0, 2.0, 0.0);
end = v3(0.0, 0.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, 1.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 0.0, 0.0, 0.0);
start = v3(0.0, 0.0, 0.0);
end = v3(0.0, -2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, 0.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 0.0, -1.0, 0.0);
/* Horizontal cases */
start = v3(0.0, 2.0, 0.0);
end = v3(10.0, 2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, 1.00001, 0.0);
end = v3(10.0, 1.00001, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, -1.00001, 0.0);
end = v3(10.0, -1.00001, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, -2.0, 0.0);
end = v3(10.0, -2.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 0);
start = v3(0.0, 0.0, 0.0);
end = v3(10.0, 0.0, 0.0);
result = cloudsOptimizeWalkingBounds(&layer, &start, &end);
ASSERT_EQ(result, 1);
ASSERT_VECTOR3_COORDS(start, 0.0, 0.0, 0.0);
ASSERT_VECTOR3_COORDS(end, 10.0, 0.0, 0.0);
}
static double _getLayerDensitySinX(Renderer*, CloudLayerDefinition*, Vector3 location)
{
double density = sin(location.x * (2.0 * M_PI));
return (density > 0.0) ? density : 0.0;
}
static double _getEdgeDensitySquared(Renderer*, CloudLayerDefinition*, Vector3, double edge_density)
{
return edge_density * edge_density;
}
TEST(Clouds, Walking)
{
/* Init */
CloudLayerDefinition layer(NULL);
layer.lower_altitude = -1.0;
layer.thickness = 2.0;
layer.validate();
Renderer* renderer;
renderer = rendererCreate();
renderer->render_quality = 8;
renderer->clouds->getLayerDensity = _getLayerDensitySinX;
CloudsWalker* walker = cloudsCreateWalker(renderer, &layer, v3(-0.4, 0.0, 0.0), v3(1.75, 0.0, 0.0));
CloudWalkerStepInfo* segment;
int result;
/* First step */
cloudsWalkerSetStepSize(walker, 0.3);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.3);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, 0.0);
ASSERT_VECTOR3_COORDS(segment->start.location, -0.4, 0.0, 0.0);
ASSERT_DOUBLE_EQ(segment->start.global_density, 0.0);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, 0.3);
ASSERT_VECTOR3_COORDS(segment->end.location, -0.1, 0.0, 0.0);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.0);
/* Second step */
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.3);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, 0.3);
ASSERT_VECTOR3_COORDS(segment->start.location, -0.1, 0.0, 0.0);
ASSERT_DOUBLE_EQ(segment->start.global_density, 0.0);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, 0.6);
ASSERT_VECTOR3_COORDS(segment->end.location, 0.2, 0.0, 0.0);
ASSERT_GT(segment->end.global_density, 0.9);
/* Order to refine second step around the entry point */
cloudsWalkerOrderRefine(walker, 0.01);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_TRUE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_IN_RANGE(segment->length, 0.19, 0.20);
ASSERT_DOUBLE_IN_RANGE(segment->start.distance_from_start, 0.40, 0.41);
ASSERT_DOUBLE_IN_RANGE(segment->start.location.x, 0.0, 0.01);
ASSERT_GT(segment->start.global_density, 0.0);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, 0.6);
ASSERT_VECTOR3_COORDS(segment->end.location, 0.2, 0.0, 0.0);
ASSERT_GT(segment->end.global_density, 0.9);
/* Third step, change step size */
cloudsWalkerSetStepSize(walker, 0.4);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.4);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, 0.6);
ASSERT_VECTOR3_COORDS(segment->start.location, 0.2, 0.0, 0.0);
ASSERT_GT(segment->start.global_density, 0.9);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, 1.0);
ASSERT_VECTOR3_COORDS(segment->end.location, 0.6, 0.0, 0.0);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.0);
/* Refine exit point */
cloudsWalkerOrderRefine(walker, 0.001);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_TRUE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_IN_RANGE(segment->length, 0.3, 0.301);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, 0.6);
ASSERT_VECTOR3_COORDS(segment->start.location, 0.2, 0.0, 0.0);
ASSERT_GT(segment->start.global_density, 0.9);
ASSERT_DOUBLE_IN_RANGE(segment->end.distance_from_start, 0.9, 0.901);
ASSERT_DOUBLE_IN_RANGE(segment->end.location.x, 0.5, 0.501);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.0);
/* Find next entry point by skipping blank */
cloudsWalkerSetVoidSkipping(walker, 1);
cloudsWalkerSetStepSize(walker, 0.2);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.2);
ASSERT_DOUBLE_IN_RANGE(segment->start.distance_from_start, 1.2, 1.4);
ASSERT_DOUBLE_IN_RANGE(segment->start.location.x, 0.8, 1.0);
ASSERT_DOUBLE_EQ(segment->start.global_density, 0.0);
ASSERT_DOUBLE_IN_RANGE(segment->end.distance_from_start, 1.4, 1.6);
ASSERT_DOUBLE_IN_RANGE(segment->end.location.x, 1.0, 1.2);
ASSERT_GT(segment->end.global_density, 0.0);
/* Refine entry point */
cloudsWalkerOrderRefine(walker, 0.01);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_TRUE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_IN_RANGE(segment->length, 0.0, 0.2);
ASSERT_DOUBLE_IN_RANGE(segment->start.distance_from_start, 1.4, 1.41);
ASSERT_DOUBLE_IN_RANGE(segment->start.location.x, 1.0, 1.01);
ASSERT_GT(segment->start.global_density, 0.0);
ASSERT_DOUBLE_IN_RANGE(segment->end.distance_from_start, 1.41, 1.6);
ASSERT_DOUBLE_IN_RANGE(segment->end.location.x, 1.01, 1.2);
ASSERT_GT(segment->end.global_density, 0.0);
/* Subdivide entry for more detail */
CloudWalkerStepInfo parent = *segment;
cloudsWalkerOrderSubdivide(walker, 3);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_TRUE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, parent.length / 3.0);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, parent.start.distance_from_start);
ASSERT_DOUBLE_EQ(segment->start.location.x, parent.start.location.x);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, parent.start.distance_from_start + segment->length);
ASSERT_DOUBLE_EQ(segment->end.location.x, parent.start.location.x + segment->length);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_TRUE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, parent.length / 3.0);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, parent.start.distance_from_start + segment->length);
ASSERT_DOUBLE_EQ(segment->start.location.x, parent.start.location.x + segment->length);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, parent.start.distance_from_start + 2.0 * segment->length);
ASSERT_DOUBLE_EQ(segment->end.location.x, parent.start.location.x + 2.0 * segment->length);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_TRUE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, parent.length / 3.0);
ASSERT_DOUBLE_EQ(segment->start.distance_from_start, parent.start.distance_from_start + 2.0 * segment->length);
ASSERT_DOUBLE_EQ(segment->start.location.x, parent.start.location.x + 2.0 * segment->length);
ASSERT_DOUBLE_EQ(segment->end.distance_from_start, parent.end.distance_from_start);
ASSERT_DOUBLE_EQ(segment->end.location.x, parent.end.location.x);
/* After subdividing, normal walking resumes */
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.2);
ASSERT_DOUBLE_IN_RANGE(segment->start.distance_from_start, 1.41, 1.6);
ASSERT_DOUBLE_IN_RANGE(segment->start.location.x, 1.01, 1.2);
ASSERT_GT(segment->start.global_density, 0.0);
ASSERT_DOUBLE_IN_RANGE(segment->end.distance_from_start, 1.61, 1.8);
ASSERT_DOUBLE_IN_RANGE(segment->end.location.x, 1.21, 1.4);
ASSERT_GT(segment->end.global_density, 0.0);
/* Exiting cloud again */
cloudsWalkerSetStepSize(walker, 0.3);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.3);
ASSERT_DOUBLE_IN_RANGE(segment->start.distance_from_start, 1.61, 1.8);
ASSERT_DOUBLE_IN_RANGE(segment->start.location.x, 1.21, 1.4);
ASSERT_GT(segment->start.global_density, 0.0);
ASSERT_DOUBLE_IN_RANGE(segment->end.distance_from_start, 1.91, 2.1);
ASSERT_DOUBLE_IN_RANGE(segment->end.location.x, 1.5, 1.7);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.0);
/* A step in the void without skipping */
cloudsWalkerSetVoidSkipping(walker, 0);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_FALSE(segment->refined);
ASSERT_FALSE(segment->subdivided);
ASSERT_DOUBLE_EQ(segment->length, 0.3);
ASSERT_DOUBLE_IN_RANGE(segment->start.distance_from_start, 1.91, 2.1);
ASSERT_DOUBLE_IN_RANGE(segment->start.location.x, 1.5, 1.7);
ASSERT_DOUBLE_EQ(segment->start.global_density, 0.0);
ASSERT_DOUBLE_IN_RANGE(segment->end.distance_from_start, 2.21, 2.4);
ASSERT_DOUBLE_IN_RANGE(segment->end.location.x, 1.8, 2.0);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.0);
/* Walker reached the lookup segment's end, it should stop */
result = cloudsWalkerPerformStep(walker);
ASSERT_EQ(result, 0);
/* Clean up */
cloudsDeleteWalker(walker);
rendererDelete(renderer);
}
TEST(Clouds, WalkingLocal)
{
/* Init */
CloudLayerDefinition layer(NULL);
layer.lower_altitude = -1.0;
layer.thickness = 2.0;
layer.validate();
Renderer* renderer;
renderer = rendererCreate();
renderer->render_quality = 8;
renderer->clouds->getLayerDensity = _getLayerDensitySinX;
renderer->clouds->getEdgeDensity = _getEdgeDensitySquared;
CloudsWalker* walker = cloudsCreateWalker(renderer, &layer, v3(0.0, 0.0, 0.0), v3(1.0, 0.0, 0.0));
CloudWalkerStepInfo* segment;
int result;
/* Test that local density is off by default */
cloudsWalkerSetStepSize(walker, 0.3);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_DOUBLE_EQ(segment->length, 0.3);
ASSERT_DOUBLE_EQ(segment->start.global_density, 0.0);
ASSERT_DOUBLE_EQ(segment->start.local_density, 0.0);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.951056516295);
ASSERT_DOUBLE_EQ(segment->end.local_density, 0.0);
/* Test it's automatically enabled on subdivision */
cloudsWalkerOrderSubdivide(walker, 2);
result = cloudsWalkerPerformStep(walker);
segment = cloudsWalkerGetLastSegment(walker);
ASSERT_EQ(result, 1);
ASSERT_DOUBLE_EQ(segment->length, 0.15);
ASSERT_DOUBLE_EQ(segment->start.global_density, 0.0);
ASSERT_DOUBLE_EQ(segment->start.local_density, 0.0);
ASSERT_DOUBLE_EQ(segment->end.global_density, 0.809016994375);
ASSERT_DOUBLE_EQ(segment->end.local_density, 0.654508497187);
}
#endif
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