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feat: added noise modifier

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This commit is contained in:
Sara Gerretsen 2026-04-22 22:46:58 +02:00
parent f422cdabaf
commit 17ab22da9c
3 changed files with 81 additions and 0 deletions
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2
register_types.cpp
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@ -6,6 +6,7 @@
#include "terrain/terrain_modifier.h"
#include "terrain/terrain_modifier_composite.h"
#include "terrain/terrain_modifier_distance.h"
#include "terrain/terrain_modifier_noise.h"
#include "terrain/terrain_modifier_path.h"
void initialize_terrain_module(ModuleInitializationLevel p_level) {
@ -17,6 +18,7 @@ void initialize_terrain_module(ModuleInitializationLevel p_level) {
ClassDB::register_class<TerrainModifierDistance>();
ClassDB::register_class<TerrainModifierPath>();
ClassDB::register_class<TerrainModifierComposite>();
ClassDB::register_class<TerrainModifierNoise>();
ClassDB::register_class<TerrainChunkMesh>();
}

52
terrain_modifier_noise.cpp Normal file
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@ -0,0 +1,52 @@
#include "terrain_modifier_noise.h"
#include "core/math/math_defs.h"
#include "macros.h"
void TerrainModifierNoise::_bind_methods() {
BIND_HPROPERTY(Variant::OBJECT, noise, PROPERTY_HINT_RESOURCE_TYPE, "Noise");
BIND_PROPERTY(Variant::FLOAT, noise_amplitude);
}
void TerrainModifierNoise::push_changed_all() {
push_changed(get_bounds());
}
void TerrainModifierNoise::noise_changed() {
{
SharedMutex::LockExclusive exclusive{ this->lock };
this->noise_buffer = this->noise->duplicate_deep();
}
push_changed_all();
}
float TerrainModifierNoise::evaluate_at(Vector2 world_coordinates, float before) {
SharedMutex::LockShared shared{ this->lock };
if (this->noise.is_null()) {
return before;
}
return 0.5f * this->noise_amplitude * (this->noise_buffer->get_noise_2d(world_coordinates.x, world_coordinates.y) + 1.f) + before;
}
void TerrainModifierNoise::set_noise(Ref<Noise> noise) {
{
SharedMutex::LockExclusive exclusive{ this->lock };
if (noise == this->noise) {
return;
}
if (this->noise.is_valid()) {
this->noise->disconnect_changed(callable_mp(this, &self_type::noise_changed));
}
if (noise.is_valid()) {
noise->connect_changed(callable_mp(this, &self_type::noise_changed));
set_bounds({ { -Math::INF, -Math::INF }, { Math::INF, Math::INF } });
} else {
set_bounds({ { 0, 0 }, { 0, 0 } });
}
this->noise = noise;
}
noise_changed();
}
Ref<Noise> TerrainModifierNoise::get_noise() const {
return this->noise;
}

27
terrain_modifier_noise.h Normal file
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@ -0,0 +1,27 @@
#pragma once
#include "macros.h"
#include "modules/noise/noise.h"
#include "terrain/shared_mutex.h"
#include "terrain/terrain_modifier.h"
class TerrainModifierNoise : public TerrainModifier {
GDCLASS(TerrainModifierNoise, TerrainModifier);
static void _bind_methods();
void push_changed_all();
void noise_changed();
public:
float evaluate_at(Vector2 world_coordinates, float before) override;
private:
SharedMutex lock{};
Ref<Noise> noise{};
Ref<Noise> noise_buffer{};
float noise_amplitude{ 1.f };
public:
void set_noise(Ref<Noise> noise);
Ref<Noise> get_noise() const;
GET_SET_FNS_EX(float, noise_amplitude, push_changed_all());
};