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// This file is part of the 64k demo project.
// It tests the procedural generation system.
#include "procedural/generator.h"
#include <cassert>
#include <cmath>
#include <iostream>
#include <vector>
void test_noise() {
std::cout << "Testing Noise Generator..." << std::endl;
int w = 64, h = 64;
std::vector<uint8_t> buffer(w * h * 4);
float params[] = {12345, 1.0f}; // Seed, Intensity
// Test with explicit params
bool res = procedural::gen_noise(buffer.data(), w, h, params, 2);
assert(res);
assert(buffer[3] == 255);
// Check that not all pixels are black
bool nonzero = false;
for (size_t i = 0; i < buffer.size(); i += 4) {
if (buffer[i] > 0) {
nonzero = true;
break;
}
}
assert(nonzero);
// Test with default params
std::fill(buffer.begin(), buffer.end(), 0);
res = procedural::gen_noise(buffer.data(), w, h, nullptr, 0);
assert(res);
assert(buffer[3] == 255); // Alpha should still be set
}
void test_perlin() {
std::cout << "Testing Perlin Generator..." << std::endl;
int w = 64, h = 64;
std::vector<uint8_t> buffer(w * h * 4);
// Test with explicit params
// Params: Seed, Freq, Amp, Decay, Octaves
float params[] = {12345, 4.0f, 1.0f, 0.5f, 4.0f};
bool res = procedural::gen_perlin(buffer.data(), w, h, params, 5);
assert(res);
assert(buffer[3] == 255);
bool nonzero = false;
for (size_t i = 0; i < buffer.size(); i += 4) {
if (buffer[i] > 0) {
nonzero = true;
break;
}
}
assert(nonzero);
// Test with default params
std::fill(buffer.begin(), buffer.end(), 0);
res = procedural::gen_perlin(buffer.data(), w, h, nullptr, 0);
assert(res);
assert(buffer[3] == 255);
// Test memory allocation failure simulation (large dimensions)
// This is hard to robustly test without mocking, but we can try an
// excessively large allocation if desired. For now, we trust the logic path.
}
void test_grid() {
std::cout << "Testing Grid Generator..." << std::endl;
int w = 100, h = 100;
std::vector<uint8_t> buffer(w * h * 4);
float params[] = {10, 1}; // Size 10, Thickness 1
// Test with explicit params
bool res = procedural::gen_grid(buffer.data(), w, h, params, 2);
assert(res);
// Pixel (0,0) should be white (on line)
assert(buffer[0] == 255);
// Pixel (5,5) should be black (off line, since size=10)
assert(buffer[(5 * w + 5) * 4] == 0);
// Pixel (10,0) should be white (on vertical line)
assert(buffer[(0 * w + 10) * 4] == 255);
// Test with default params
res = procedural::gen_grid(buffer.data(), w, h, nullptr, 0);
assert(res);
// Default size is 32, thickness 2
assert(buffer[0] == 255);
assert(buffer[(0 * w + 32) * 4] == 255);
}
void test_periodic() {
std::cout << "Testing Periodic Blending..." << std::endl;
int w = 64, h = 64;
std::vector<uint8_t> buffer(w * h * 4);
// Fill with horizontal gradient: left=0, right=255
for (int y = 0; y < h; ++y) {
for (int x = 0; x < w; ++x) {
int idx = (y * w + x) * 4;
buffer[idx] = (uint8_t)(x * 255 / (w - 1));
buffer[idx + 1] = 0;
buffer[idx + 2] = 0;
buffer[idx + 3] = 255;
}
}
// Pre-check: edges are different
assert(buffer[0] == 0);
assert(buffer[(w - 1) * 4] == 255);
float params[] = {0.1f}; // Blend ratio 10%
bool res = procedural::make_periodic(buffer.data(), w, h, params, 1);
assert(res);
// Post-check: Left edge (x=0) should now be blended with right edge.
// Logic: blend right edge INTO left edge. At x=0, we copy from right side.
// So buffer[0] should be close to 255 (value from right).
assert(buffer[0] > 200);
// Check invalid ratio
float invalid_params[] = {-1.0f};
res = procedural::make_periodic(buffer.data(), w, h, invalid_params, 1);
assert(res); // Should return true but do nothing
}
void test_plasma() {
std::cout << "Testing Plasma Generator..." << std::endl;
int w = 64, h = 64;
std::vector<uint8_t> buffer(w * h * 4);
float params[] = {0.0f, 2.0f};
bool res = procedural::gen_plasma(buffer.data(), w, h, params, 2);
assert(res);
assert(buffer[3] == 255);
// RGB should differ (color output, not grayscale)
bool has_color = false;
for (size_t i = 0; i < buffer.size(); i += 4) {
if (buffer[i] != buffer[i + 1] || buffer[i + 1] != buffer[i + 2]) {
has_color = true;
break;
}
}
assert(has_color);
// Test defaults
res = procedural::gen_plasma(buffer.data(), w, h, nullptr, 0);
assert(res);
}
void test_voronoi() {
std::cout << "Testing Voronoi Generator..." << std::endl;
int w = 64, h = 64;
std::vector<uint8_t> buffer(w * h * 4);
// F1 mode
float params_f1[] = {4.0f, 0.0f, 0.0f};
bool res = procedural::gen_voronoi(buffer.data(), w, h, params_f1, 3);
assert(res);
assert(buffer[3] == 255);
bool nonzero = false;
for (size_t i = 0; i < buffer.size(); i += 4) {
if (buffer[i] > 0) { nonzero = true; break; }
}
assert(nonzero);
// F2-F1 (borders) mode
float params_border[] = {4.0f, 2.0f, 0.0f};
res = procedural::gen_voronoi(buffer.data(), w, h, params_border, 3);
assert(res);
// Test defaults
res = procedural::gen_voronoi(buffer.data(), w, h, nullptr, 0);
assert(res);
}
void test_normalmap() {
std::cout << "Testing Normal Map Generator..." << std::endl;
int w = 64, h = 64;
std::vector<uint8_t> buffer(w * h * 4);
// Fill with a horizontal gradient as height
for (int y = 0; y < h; ++y) {
for (int x = 0; x < w; ++x) {
int idx = (y * w + x) * 4;
buffer[idx] = (uint8_t)(x * 255 / (w - 1));
buffer[idx + 1] = buffer[idx];
buffer[idx + 2] = buffer[idx];
buffer[idx + 3] = 255;
}
}
float params[] = {4.0f};
bool res = procedural::gen_normalmap(buffer.data(), w, h, params, 1);
assert(res);
assert(buffer[3] == 255);
// For a horizontal gradient, X-normal (R) should be shifted from 128
// (non-flat normals expected)
bool has_normal_variation = false;
for (size_t i = 0; i < buffer.size(); i += 4) {
if (buffer[i] != 128) { has_normal_variation = true; break; }
}
assert(has_normal_variation);
// Z component (B) should be > 0 (normal faces up)
assert(buffer[2] > 0);
}
int main() {
test_noise();
test_perlin();
test_grid();
test_periodic();
test_plasma();
test_voronoi();
test_normalmap();
std::cout << "--- PROCEDURAL TESTS PASSED ---" << std::endl;
return 0;
}
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