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#include "world.h"
#include "game.h"
World createWorld(const Assets* assets)
{
World world;
world.size = (Vector3){1000.0, 20.0, 1000.0};
world.image = &assets->images[HEIGHT_MAP_IMAGE];
// Heightmap.
Mesh mesh = GenMeshHeightmap(*world.image, world.size);
world.heightmap = LoadModelFromMesh(mesh);
world.heightmap.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture =
assets->textures[HEIGHT_MAP_TEXTURE];
uint32_t seed = 57;
// Entities.
for (int index = 0; index < WORLD_ENTITY_MAX; ++index)
{
FT_RANDOM16(seed);
Entity entity = createEntity(seed % ENTITY_COUNT, Vector3Zero());
FT_RANDOM16(seed);
// It be funky and give negative numbers.
entity.position.x = seed % (int)world.size.x;
FT_RANDOM16(seed);
entity.position.z = seed % (int)world.size.z;
entity.position.y = getWorldHeightAtLocation(world, entity.position.x,
entity.position.z) + 1.0;
world.entities[index] = entity;
}
return world;
}
void updateWorld(World* world, Game* game)
{
DrawModel(world->heightmap, Vector3Zero(), 1.0, WHITE);
for (int index = 0; index < WORLD_ENTITY_MAX; ++index)
{
updateEntity(&world->entities[index], game);
}
}
void freeWorld(World world)
{
UnloadModel(world.heightmap);
}
float getWorldPixelHeight(World world, int x, int y)
{
int verticeStart = (y * (world.image->width - 1) + x) * 18;
float height = 0.0;
int count = 0;
for (int index = 1; index < 18; index += 3)
{
height += world.heightmap.meshes[0].vertices[verticeStart + index];
++count;
}
return (float)height / count;
}
float getWorldHeightAtLocation(World world, float x, float y)
{
float toMapX = (float)world.image->width / world.size.x;
float toMapY = (float)world.image->height / world.size.z;
int pixelX = roundf((float)x * toMapX);
int pixelY = roundf((float)y * toMapY);
return getWorldPixelHeight(world, pixelX, pixelY);
}
// Abortions are good. Get more abortions.
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