engine/ext/world/terrain/generator.cpp
2018-05-14 00:00:00 -05:00

408 lines
18 KiB
C++

#include "generator.h"
#include "../../ext.h"
#include "voxel.h"
#include <uf/engine/entity/entity.h>
#include <uf/gl/shader/shader.h>
#include <uf/gl/mesh/mesh.h>
#include <uf/gl/texture/texture.h>
#include <uf/gl/camera/camera.h>
#include <uf/utils/math/transform.h>
#include <uf/utils/math/physics.h>
void ext::TerrainGenerator::initialize( const pod::Vector3ui& size ){
this->m_voxels = NULL;
this->m_size = size;
}
void ext::TerrainGenerator::destroy(){ if ( !this->m_voxels ) return;
for ( uint x = 0; x < this->m_size.x; ++x ) {
for ( uint y = 0; y < this->m_size.y; ++y ) delete[] this->m_voxels[x][y];
delete[] this->m_voxels[x];
}
delete[] this->m_voxels;
this->m_voxels = NULL;
}
void ext::TerrainGenerator::generate(){ if ( this->m_voxels ) return;
/*
struct {
ext::TerrainVoxel::uid_t floor = ext::TerrainVoxelFloor().uid();
ext::TerrainVoxel::uid_t wall = ext::TerrainVoxelWall().uid();
ext::TerrainVoxel::uid_t ceiling = ext::TerrainVoxelCeiling().uid();
} atlas;
this->m_voxels = new ext::TerrainVoxel::uid_t**[this->m_size.x];
for ( uint x = 0; x < this->m_size.x; ++x ) { this->m_voxels[x] = new ext::TerrainVoxel::uid_t*[this->m_size.y];
for ( uint y = 0; y < this->m_size.y; ++y ) { this->m_voxels[x][y] = new ext::TerrainVoxel::uid_t[this->m_size.z];
for ( uint z = 0; z < this->m_size.z; ++z ) { ext::TerrainVoxel::uid_t voxel = 0;
if ( x == 0 ) voxel = atlas.wall; if ( x == this->m_size.x - 1 ) voxel = atlas.wall;
if ( z == 0 ) voxel = atlas.wall; if ( z == this->m_size.z - 1 ) voxel = atlas.wall;
if ( y == 0 ) voxel = atlas.floor; if ( y == this->m_size.y - 1 ) voxel = atlas.ceiling;
if ( y > 0 && y < this->m_size.y - 1 ) {
if ( x > 4 && x < this->m_size.x - 4 ) voxel = 0;
if ( z > 4 && z < this->m_size.z - 4 ) voxel = 0;
}
this->m_voxels[x][y][z] = voxel;
}
}
}
*/
int lim_x = this->m_size.x;
int lim_y = this->m_size.y;
int lim_z = this->m_size.z;
if ( lim_x < 0 || lim_y < 0 || lim_z < 0 ) return;
int half_x = lim_x / 2;
int half_y = lim_y / 2;
int half_z = lim_z / 2;
struct {
ext::TerrainVoxel::uid_t floor = ext::TerrainVoxelFloor().uid();// = uf::World::atlas.getFromString("Regular Floor").getUid();
ext::TerrainVoxel::uid_t wall = ext::TerrainVoxelWall().uid();// = uf::World::atlas.getFromString("Regular Wall").getUid();
ext::TerrainVoxel::uid_t ceiling = ext::TerrainVoxelCeiling().uid();// = uf::World::atlas.getFromString("Regular Ceiling").getUid();
ext::TerrainVoxel::uid_t stair = ext::TerrainVoxelStair().uid();// = uf::World::atlas.getFromString("Regular Stair").getUid();
ext::TerrainVoxel::uid_t pillar = ext::TerrainVoxelPillar().uid();// = uf::World::atlas.getFromString("Regular Pillar").getUid();
} atlas;
this->m_voxels = new ext::TerrainVoxel::uid_t**[this->m_size.x];
for ( uint x = 0; x < this->m_size.x; ++x ) { this->m_voxels[x] = new ext::TerrainVoxel::uid_t*[this->m_size.y];
for ( uint y = 0; y < this->m_size.y; ++y ) { this->m_voxels[x][y] = new ext::TerrainVoxel::uid_t[this->m_size.z];
}
}
int rand_roomType = rand() % 6;
static bool first = false;
if ( !first ) rand_roomType = 0, first = true;
for ( int x = 0; x < lim_x; x++ ) {
for ( int y = 0; y < lim_y; y++ ) {
for ( int z = 0; z < lim_z; z++ ) {
if ( this->m_voxels == NULL || this->m_voxels[x] == NULL || this->m_voxels[x][y] == NULL ) break;
this->m_voxels[x][y][z] = 0;
// Wall
/*
if ((( x == 0 || x == 1 ) && ( z == lim_z - 1 || z == lim_z - 2 )) ||
(( z == 0 || z == 1 ) && ( x == lim_x - 1 || x == lim_x - 2 )))
this->m_voxels[x][y][z] = wall;
*/
// Floor
if ( y == 0 ) this->m_voxels[x][y][z] = atlas.floor;
// Ceiling
if ( y + 1 == lim_y ) this->m_voxels[x][y][z] = rand() % 10 < 8.0f ? 0 : atlas.ceiling;
}
}
}
switch ( rand_roomType ) {
// Wall-less room
case 2: break;
// Typical Room
default:
// North
for ( int y = 0; y < lim_y; y++ ) {
for ( int x = 0; x < lim_x; x++ ) {
float randed_wall = rand() % 10;
if ( !(y < 5 && x>half_x-3&&x<half_x+3) && randed_wall > 4.0f )
this->m_voxels[x][y][lim_z-1] = atlas.wall;
else
this->m_voxels[x][y][lim_z-1] = 0;
}
}
// South
for ( int y = 0; y < lim_y; y++ ) {
for ( int x = 0; x < lim_x; x++ ) {
float randed_wall = rand() % 10;
if ( !(y < 5 && x>half_x-3&&x<half_x+3) && randed_wall > 4.0f )
this->m_voxels[x][y][0] = atlas.wall;
else
this->m_voxels[x][y][0] = 0;
}
}
// East
for ( int y = 0; y < lim_y; y++ ) {
for ( int z = 0; z < lim_x; z++ ) {
float randed_wall = rand() % 10;
if ( !(y < 5 && z>half_z-3&&z<half_z+3) && randed_wall > 3.0f )
this->m_voxels[lim_z-1][y][z] = atlas.wall;
else
this->m_voxels[lim_z-1][y][z] = 0;
}
}
for ( int x = 0; x < lim_x; x++ ) {
for ( int z = 0; z < lim_z; z++ ) {
this->m_voxels[x][0][z] = atlas.floor;
}
}
// Default Room
// Hole room
case 0:
for ( int x = half_x - (half_x / 2); x < half_x + (half_x / 2) + 1; x++ )
for ( int z = half_z - (half_z / 2); z < half_z + (half_z / 2) + 1; z++ )
if ( rand() % 10 > 1.25f ) this->m_voxels[x][0][z] = 0;
break;
// Pillar
case 3:
for ( int x = half_x - 1; x <= half_x + 1; x++ )
for ( int z = half_z - 1; z <= half_z + 1; z++ )
for ( int y = 0; y < lim_y; y++ )
if ( rand() % 10 > 1.25f ) this->m_voxels[x][y][z] = atlas.pillar;
break;
// Stair room
case 4:
int randed_direction = rand() % 2;
int start_x = std::max(half_x - 3, 0);
int stop_x = std::min(half_x + 5, lim_x);
int start_z = -2;
int stop_z = 2;
int slope_x = lim_y / ( stop_x - start_x );
int slope_z = lim_y / ( stop_z - start_z );
for ( int x = start_x; x <= stop_x; x++ )
for ( int z = start_z; z <= stop_z; z++ )
this->m_voxels[x][lim_y - 1][half_z - 1 + z] = 0;
switch ( randed_direction ) {
// Left to Right
case 0:
for ( int x = start_x; x <= stop_x; x++ ) {
int y = (x - start_x) * slope_x + 1;
for ( int z = start_z; z <= stop_z && y < lim_y; z++ )
for ( int i = y; i >= y - slope_x && i >= 0; i-- )
if ( rand() % stop_x > 3 ) this->m_voxels[x][i][half_z - 1 + z] = atlas.stair;
}
break;
// Right to Left
case 1:
for ( int x = start_x; x <= stop_x; x++ ) {
int y = (x - start_x) * slope_x + 3;
for ( int z = start_z; z <= stop_z && y < lim_y; z++ )
for ( int i = y; i >= y - slope_x && i >= 0; i-- )
if ( rand() % stop_x > 3 ) this->m_voxels[x][lim_y - 1 - i][half_z - 1 + z] = atlas.stair;
}
break;
}
break;
}
}
ext::TerrainVoxel::uid_t*** ext::TerrainGenerator::getVoxels() {
return this->m_voxels;
}
void ext::TerrainGenerator::rasterize( uf::Mesh& mesh, const ext::Region& region ){
if ( !this->m_voxels ) this->generate();
std::vector<float>& position = mesh.getPositions().getVertices();
std::vector<float>& uv = mesh.getUvs().getVertices();
std::vector<float>& normal = mesh.getNormals().getVertices();
struct { struct { float x, y, z; } position; struct { float u, v, x, y; } uv; } offset;
const ext::Terrain& terrain = region.getParent<ext::Terrain>();
const pod::Transform<>& transform = region.getComponent<pod::Transform<>>();
const pod::Vector3i location = {
(int) (transform.position.x) / this->m_size.x,
(int) (transform.position.y) / this->m_size.y,
(int) (transform.position.z) / this->m_size.z,
};
struct { ext::Region* right = NULL; ext::Region* left = NULL; ext::Region* top = NULL; ext::Region* bottom = NULL; ext::Region* front = NULL; ext::Region* back = NULL; } regions;
regions.right = terrain.at( { location.x + 1, location.y, location.z } );
regions.left = terrain.at( { location.x - 1, location.y, location.z } );
regions.top = terrain.at( { location.x, location.y + 1, location.z } );
regions.bottom = terrain.at( { location.x, location.y - 1, location.z } );
regions.front = terrain.at( { location.x, location.y, location.z + 1 } );
regions.back = terrain.at( { location.x, location.y, location.z - 1 } );
for ( uint x = 0; x < this->m_size.x; ++x ) {
for ( uint y = 0; y < this->m_size.y; ++y ) {
for ( uint z = 0; z < this->m_size.z; ++z ) {
offset.position.x = x - (this->m_size.x / 2.0f);
offset.position.y = y - (this->m_size.y / 2.0f);
offset.position.z = z - (this->m_size.z / 2.0f);
ext::TerrainVoxel voxel = ext::TerrainVoxel::atlas(this->m_voxels[x][y][z]);
const ext::TerrainVoxel::Model& model = voxel.model();
if ( !voxel.opaque() ) continue;
offset.uv.x = 1.0f / ext::TerrainVoxel::size().x;
offset.uv.y = 1.0f / ext::TerrainVoxel::size().y;
offset.uv.u = voxel.uv().x * offset.uv.x;
offset.uv.v = (ext::TerrainVoxel::size().y - 1 - voxel.uv().y) * offset.uv.y;
struct {
bool top = true, bottom = true, left = true, right = true, front = true, back = true;
} should;
struct {
ext::TerrainVoxel top = ext::TerrainVoxel::atlas(0), bottom = ext::TerrainVoxel::atlas(0), left = ext::TerrainVoxel::atlas(0), right = ext::TerrainVoxel::atlas(0), front = ext::TerrainVoxel::atlas(0), back = ext::TerrainVoxel::atlas(0);
} neighbor;
if ( x > 0 ) neighbor.left = ext::TerrainVoxel::atlas(this->m_voxels[x-1][y][z]); else if ( regions.left != NULL ) {
const ext::Region& left = *regions.left;
const ext::TerrainGenerator& t = left.getComponent<ext::TerrainGenerator>();
if ( t.m_voxels != NULL ) neighbor.left = ext::TerrainVoxel::atlas(t.m_voxels[t.m_size.x-1][y][z]);
}
if ( y > 0 ) neighbor.bottom = ext::TerrainVoxel::atlas(this->m_voxels[x][y-1][z]); else if ( regions.bottom != NULL ) {
const ext::Region& bottom = *regions.bottom;
const ext::TerrainGenerator& t = bottom.getComponent<ext::TerrainGenerator>();
if ( t.m_voxels != NULL ) neighbor.bottom =ext::TerrainVoxel::atlas( t.m_voxels[x][t.m_size.y-1][z]);
}
if ( z > 0 ) neighbor.back = ext::TerrainVoxel::atlas(this->m_voxels[x][y][z-1]); else if ( regions.back != NULL ) {
const ext::Region& back = *regions.back;
const ext::TerrainGenerator& t = back.getComponent<ext::TerrainGenerator>();
if ( t.m_voxels != NULL ) neighbor.back = ext::TerrainVoxel::atlas(t.m_voxels[x][y][t.m_size.z-1]);
}
if ( x + 1 < this->m_size.x ) neighbor.right = ext::TerrainVoxel::atlas(this->m_voxels[x+1][y][z]); else if ( regions.right != NULL ) {
const ext::Region& right = *regions.right;
const ext::TerrainGenerator& t = right.getComponent<ext::TerrainGenerator>();
if ( t.m_voxels != NULL ) neighbor.right = ext::TerrainVoxel::atlas(t.m_voxels[0][y][z]);
}
if ( y + 1 < this->m_size.y ) neighbor.top = ext::TerrainVoxel::atlas(this->m_voxels[x][y+1][z]); else if ( regions.top != NULL ) {
const ext::Region& top = *regions.top;
const ext::TerrainGenerator& t = top.getComponent<ext::TerrainGenerator>();
if ( t.m_voxels != NULL ) neighbor.top = ext::TerrainVoxel::atlas(t.m_voxels[x][0][z]);
}
if ( z + 1 < this->m_size.z ) neighbor.front = ext::TerrainVoxel::atlas(this->m_voxels[x][y][z+1]); else if ( regions.front != NULL ) {
const ext::Region& front = *regions.front;
const ext::TerrainGenerator& t = front.getComponent<ext::TerrainGenerator>();
if ( t.m_voxels != NULL ) neighbor.front = ext::TerrainVoxel::atlas(t.m_voxels[x][y][0]);
}
should.right = !neighbor.right.opaque();
should.left = !neighbor.left.opaque();
should.top = !neighbor.top.opaque();
should.bottom = !neighbor.bottom.opaque();
should.front = !neighbor.front.opaque();
should.back = !neighbor.back.opaque();
if ( should.right ) {
for ( uint i = 0; i < model.position.right.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.position.right[i*3+0]; p.y = model.position.right[i*3+1]; p.z = model.position.right[i*3+2];
p.x += offset.position.x; p.y += offset.position.y; p.z += offset.position.z;
position.push_back(p.x); position.push_back(p.y); position.push_back(p.z);
}
for ( uint i = 0; i < model.uv.right.size() / 2; ++i ) {
struct { float x, y; } p;
p.x = model.uv.right[i*2+0]; p.y = model.uv.right[i*2+1];
p.x *= offset.uv.x; p.y *= offset.uv.y;
p.x += offset.uv.u; p.y += offset.uv.v;
uv.push_back(p.x); uv.push_back(p.y);
}
for ( uint i = 0; i < model.normal.right.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.normal.right[i*3+0]; p.y = model.normal.right[i*3+1]; p.z = model.normal.right[i*3+2];
normal.push_back(p.x); normal.push_back(p.y); normal.push_back(p.z);
}
}
if ( should.left ) {
for ( uint i = 0; i < model.position.left.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.position.left[i*3+0]; p.y = model.position.left[i*3+1]; p.z = model.position.left[i*3+2];
p.x += offset.position.x; p.y += offset.position.y; p.z += offset.position.z;
position.push_back(p.x); position.push_back(p.y); position.push_back(p.z);
}
for ( uint i = 0; i < model.uv.left.size() / 2; ++i ) {
struct { float x, y; } p;
p.x = model.uv.left[i*2+0]; p.y = model.uv.left[i*2+1];
p.x *= offset.uv.x; p.y *= offset.uv.y;
p.x += offset.uv.u; p.y += offset.uv.v;
uv.push_back(p.x); uv.push_back(p.y);
}
for ( uint i = 0; i < model.normal.left.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.normal.left[i*3+0]; p.y = model.normal.left[i*3+1]; p.z = model.normal.left[i*3+2];
normal.push_back(p.x); normal.push_back(p.y); normal.push_back(p.z);
}
}
if ( should.top ) {
for ( uint i = 0; i < model.position.top.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.position.top[i*3+0]; p.y = model.position.top[i*3+1]; p.z = model.position.top[i*3+2];
p.x += offset.position.x; p.y += offset.position.y; p.z += offset.position.z;
position.push_back(p.x); position.push_back(p.y); position.push_back(p.z);
}
for ( uint i = 0; i < model.uv.top.size() / 2; ++i ) {
struct { float x, y; } p;
p.x = model.uv.top[i*2+0]; p.y = model.uv.top[i*2+1];
p.x *= offset.uv.x; p.y *= offset.uv.y;
p.x += offset.uv.u; p.y += offset.uv.v;
uv.push_back(p.x); uv.push_back(p.y);
}
for ( uint i = 0; i < model.normal.top.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.normal.top[i*3+0]; p.y = model.normal.top[i*3+1]; p.z = model.normal.top[i*3+2];
normal.push_back(p.x); normal.push_back(p.y); normal.push_back(p.z);
}
}
if ( should.bottom ) {
for ( uint i = 0; i < model.position.bottom.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.position.bottom[i*3+0]; p.y = model.position.bottom[i*3+1]; p.z = model.position.bottom[i*3+2];
p.x += offset.position.x; p.y += offset.position.y; p.z += offset.position.z;
position.push_back(p.x); position.push_back(p.y); position.push_back(p.z);
}
for ( uint i = 0; i < model.uv.bottom.size() / 2; ++i ) {
struct { float x, y; } p;
p.x = model.uv.bottom[i*2+0]; p.y = model.uv.bottom[i*2+1];
p.x *= offset.uv.x; p.y *= offset.uv.y;
p.x += offset.uv.u; p.y += offset.uv.v;
uv.push_back(p.x); uv.push_back(p.y);
}
for ( uint i = 0; i < model.normal.bottom.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.normal.bottom[i*3+0]; p.y = model.normal.bottom[i*3+1]; p.z = model.normal.bottom[i*3+2];
normal.push_back(p.x); normal.push_back(p.y); normal.push_back(p.z);
}
}
if ( should.front ) {
for ( uint i = 0; i < model.position.front.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.position.front[i*3+0]; p.y = model.position.front[i*3+1]; p.z = model.position.front[i*3+2];
p.x += offset.position.x; p.y += offset.position.y; p.z += offset.position.z;
position.push_back(p.x); position.push_back(p.y); position.push_back(p.z);
}
for ( uint i = 0; i < model.uv.front.size() / 2; ++i ) {
struct { float x, y; } p;
p.x = model.uv.front[i*2+0]; p.y = model.uv.front[i*2+1];
p.x *= offset.uv.x; p.y *= offset.uv.y;
p.x += offset.uv.u; p.y += offset.uv.v;
uv.push_back(p.x); uv.push_back(p.y);
}
for ( uint i = 0; i < model.normal.front.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.normal.front[i*3+0]; p.y = model.normal.front[i*3+1]; p.z = model.normal.front[i*3+2];
normal.push_back(p.x); normal.push_back(p.y); normal.push_back(p.z);
}
}
if ( should.back ) {
for ( uint i = 0; i < model.position.back.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.position.back[i*3+0]; p.y = model.position.back[i*3+1]; p.z = model.position.back[i*3+2];
p.x += offset.position.x; p.y += offset.position.y; p.z += offset.position.z;
position.push_back(p.x); position.push_back(p.y); position.push_back(p.z);
}
for ( uint i = 0; i < model.uv.back.size() / 2; ++i ) {
struct { float x, y; } p;
p.x = model.uv.back[i*2+0]; p.y = model.uv.back[i*2+1];
p.x *= offset.uv.x; p.y *= offset.uv.y;
p.x += offset.uv.u; p.y += offset.uv.v;
uv.push_back(p.x); uv.push_back(p.y);
}
for ( uint i = 0; i < model.normal.back.size() / 3; ++i ) {
struct { float x, y, z; } p;
p.x = model.normal.back[i*3+0]; p.y = model.normal.back[i*3+1]; p.z = model.normal.back[i*3+2];
normal.push_back(p.x); normal.push_back(p.y); normal.push_back(p.z);
}
}
}
}
}
mesh.index();
mesh.generate();
}