/* Starshatter OpenSource Distribution Copyright (c) 1997-2004, Destroyer Studios LLC. All Rights Reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name "Destroyer Studios" nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 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SUBSYSTEM: Stars.exe FILE: Terrain.cpp AUTHOR: John DiCamillo OVERVIEW ======== */ #include "MemDebug.h" #include "Terrain.h" #include "TerrainApron.h" #include "TerrainClouds.h" #include "TerrainLayer.h" #include "TerrainPatch.h" #include "TerrainRegion.h" #include "Water.h" #include "CameraView.h" #include "Projector.h" #include "Scene.h" #include "Bitmap.h" #include "DataLoader.h" #include "Game.h" #include "MachineInfo.h" // +--------------------------------------------------------------------+ int Terrain::detail_level = 3; // default = MEDIUM DETAIL const int PATCH_SIZE = 16; // +--------------------------------------------------------------------+ Terrain::Terrain(TerrainRegion* trgn) : region(trgn), patches(0), water_patches(0), water(0), aprons(0), clouds(0), terrain_normals(0) { detail_frame = 0; datapath = "Galaxy/"; terrain_texture = 0; apron_texture = 0; water_texture = 0; for (int i = 0; i < 2; i++) { cloud_texture[i] = 0; shade_texture[i] = 0; noise_texture[i] = 0; } if (region) { scale = region->LateralScale(); mtnscale = region->MountainScale(); ListIter iter = region->GetLayers(); while (++iter) { TerrainLayer* orig = iter.value(); TerrainLayer* copy = new(__FILE__,__LINE__) TerrainLayer; *copy = *orig; layers.append(copy); } layers.sort(); } else { scale = 1; mtnscale = 1; } } // +--------------------------------------------------------------------+ Terrain::~Terrain() { int i, j; if (patches) for (i = 0; i < subdivisions; i++) for (j = 0; j < subdivisions; j++) GRAPHIC_DESTROY(patches[i*subdivisions+j]); if (water_patches) for (i = 0; i < subdivisions; i++) for (j = 0; j < subdivisions; j++) GRAPHIC_DESTROY(water_patches[i*subdivisions+j]); if (aprons) for (i = 0; i < 8; i++) GRAPHIC_DESTROY(aprons[i]); if (clouds) for (i = 0; i < nclouds; i++) GRAPHIC_DESTROY(clouds[i]); if (water) for (i = 0; i < 6; i++) delete water[i]; delete [] aprons; delete [] clouds; delete [] patches; delete [] water; delete [] terrain_normals; terrain_patch.ClearImage(); terrain_apron.ClearImage(); layers.destroy(); } // +--------------------------------------------------------------------+ void Terrain::BuildTerrain() { DataLoader* loader = DataLoader::GetLoader(); loader->SetDataPath(datapath); loader->LoadBitmap( region->PatchName(), terrain_patch); loader->LoadBitmap( region->ApronName(), terrain_apron); loader->LoadTexture(region->PatchTexture(), terrain_texture); loader->LoadTexture(region->ApronTexture(), apron_texture); if (region->WaterTexture().length()) { loader->LoadTexture(region->WaterTexture(), water_texture); if (region->EnvironmentTexture(0).length() > 0) { loader->LoadTexture(region->EnvironmentTexture(0), env_texture[0]); loader->LoadTexture(region->EnvironmentTexture(1), env_texture[1]); loader->LoadTexture(region->EnvironmentTexture(2), env_texture[2]); loader->LoadTexture(region->EnvironmentTexture(3), env_texture[3]); loader->LoadTexture(region->EnvironmentTexture(4), env_texture[4]); loader->LoadTexture(region->EnvironmentTexture(5), env_texture[5]); } } loader->LoadTexture(region->CloudsHigh(), cloud_texture[0], Bitmap::BMP_TRANSLUCENT); loader->LoadTexture(region->CloudsLow(), cloud_texture[1], Bitmap::BMP_TRANSLUCENT); loader->LoadTexture(region->ShadesLow(), shade_texture[1], Bitmap::BMP_TRANSLUCENT); if (region->DetailTexture0().length()) loader->LoadTexture(region->DetailTexture0(),noise_texture[0], Bitmap::BMP_TRANSLUCENT, false, true); if (region->DetailTexture1().length()) loader->LoadTexture(region->DetailTexture1(),noise_texture[1], Bitmap::BMP_TRANSLUCENT, false, true); subdivisions = terrain_patch.Width() / PATCH_SIZE; patch_size = terrain_patch.Width() / subdivisions; BuildNormals(); int i, j; int ntiles = terrain_patch.Width()/2 * terrain_patch.Height()/2; double dx = scale * patch_size; double dz = scale * patch_size; double offset = -subdivisions/2; if (water_texture) { water = new(__FILE__,__LINE__) Water*[6]; for (i = 0; i < 6; i++) { water[i] = new(__FILE__,__LINE__) Water(); int n = (1<Init(n, (float) (scale*patch_size), 90.0f); } } // load tile textures: for (i = 0; i < layers.size(); i++) { TerrainLayer* layer = layers.at(i); if (i < layers.size()-1) layer->max_height = layers.at(i+1)->min_height; else layer->max_height = 1e6; if (layer->tile_name.length()) loader->LoadTexture(layer->tile_name, layer->tile_texture); if (layer->detail_name.length()) loader->LoadTexture(layer->detail_name, layer->detail_texture); } patches = new(__FILE__,__LINE__) TerrainPatch*[subdivisions*subdivisions]; if (water_texture) water_patches = new(__FILE__,__LINE__) TerrainPatch*[subdivisions*subdivisions]; for (i = 0; i < subdivisions; i++) { for (j = 0; j < subdivisions; j++) { int j1 = subdivisions - j; Rect rect(j * patch_size, i * patch_size, patch_size, patch_size); Point p1((j1 + offset )*dx, 0, (i + offset )*dz); Point p2((j1 + offset+1)*dx, mtnscale, (i + offset+1)*dz); int index = i*subdivisions+j; patches[index] = new(__FILE__,__LINE__) TerrainPatch(this, &terrain_patch, rect, p1, p2); if (water_texture && patches[index]->MinHeight() < 3) water_patches[index] = new(__FILE__,__LINE__) TerrainPatch(this, rect, p1, p2, 30); else if (water_patches != 0) water_patches[index] = 0; } } int a = 0; dx = scale * terrain_patch.Width(); dz = scale * terrain_patch.Height(); offset = -3.0/2; double xoffset = offset + 1.0/16.0; aprons = new(__FILE__,__LINE__) TerrainApron*[8]; for (i = 0; i < 3; i++) { for (j = 0; j < 3; j++) { int j1 = 2 - j; if (i != 1 || j1 != 1) { Rect rect(j * subdivisions, i * subdivisions, subdivisions, subdivisions); Point p1((j1 + xoffset )*dx, 0, (i + offset )*dz); Point p2((j1 + xoffset+1)*dx, mtnscale, (i + offset+1)*dz); aprons[a++] = new(__FILE__,__LINE__) TerrainApron(this, &terrain_apron, rect, p1, p2); } } } Weather::STATE state = region->GetWeather().State(); if (state == Weather::HIGH_CLOUDS || state == Weather::MODERATE_CLOUDS) { double altitude = region->CloudAltHigh(); nclouds = 9; if (state == Weather::MODERATE_CLOUDS) nclouds *= 2; clouds = new(__FILE__,__LINE__) TerrainClouds*[nclouds]; a = 0; for (i = 0; i < 3; i++) { for (j = 0; j < 3; j++) { clouds[a] = new(__FILE__,__LINE__) TerrainClouds(this, 0); double xloc = (j-1) * 75000 + (rand()/32768.0 - 0.5) * 50000; double yloc = (i-1) * 75000 + (rand()/32768.0 - 0.5) * 50000; clouds[a]->MoveTo(Point(xloc, altitude, yloc)); a++; } } if (state == Weather::MODERATE_CLOUDS) { altitude = region->CloudAltLow(); for (i = 0; i < 3; i++) { for (j = 0; j < 3; j++) { clouds[a] = new(__FILE__,__LINE__) TerrainClouds(this, 1); double xloc = (j-1) * 75000 + (rand()/32768.0 - 0.5) * 50000; double yloc = (i-1) * 75000 + (rand()/32768.0 - 0.5) * 50000; clouds[a]->MoveTo(Point(xloc, altitude, yloc)); a++; } } } } } // +--------------------------------------------------------------------+ void Terrain::BuildNormals() { if (terrain_normals) { delete [] terrain_normals; terrain_normals = 0; } int i, x, y; int w = terrain_patch.Width(); int h = terrain_patch.Height(); Color* pix = terrain_patch.HiPixels(); BYTE* alt = new(__FILE__,__LINE__) BYTE[h*w]; int nverts = w * h; double scale = region->MountainScale() / (region->LateralScale() * 2.0); terrain_normals = new(__FILE__,__LINE__) Vec3B[nverts]; ZeroMemory(terrain_normals, sizeof(Vec3B) * nverts); for (i = 0; i < w; i++) { alt [ i] = 0; alt [(h-1)*w + i] = 0; terrain_normals[ i] = Vec3B(128,128,255); terrain_normals[(h-1)*w + i] = Vec3B(128,128,255); } for (i = 0; i < h; i++) { alt [i*w ] = 0; alt [i*w + (w-1)] = 0; terrain_normals[i*w ] = Vec3B(128,128,255); terrain_normals[i*w + (w-1)] = Vec3B(128,128,255); } for (y = 1; y < h-1; y++) { for (x = 1; x < w-1; x++) { alt[y*w+x] = (BYTE) pix[y*w+x].Red(); } } for (y = 1; y < h-1; y++) { for (x = 1; x < w-1; x++) { double dx = (alt[y*w + (x-1)] - alt[y*w + (x+1)]) * scale + (alt[(y-1)*w + (x-1)] - alt[(y-1)*w + (x+1)]) * scale * 0.5 + (alt[(y+1)*w + (x-1)] - alt[(y+1)*w + (x+1)]) * scale * 0.5; double dy = (alt[(y-1)*w + x ] - alt[(y+1)*w + x ]) * scale + (alt[(y-1)*w + (x-1)] - alt[(y+1)*w + (x-1)]) * scale * 0.5 + (alt[(y-1)*w + (x+1)] - alt[(y+1)*w + (x+1)]) * scale * 0.5; Point norm(dx,dy,1); norm.Normalize(); Vec3B* tnorm = &terrain_normals[y*w + x]; tnorm->x = (BYTE) (norm.x * 127 + 128); tnorm->y = (BYTE) (norm.y * 127 + 128); tnorm->z = (BYTE) (norm.z * 127 + 128); double foo = dx/dy; } } delete [] alt; } // +--------------------------------------------------------------------+ void Terrain::Activate(Scene& scene) { int i, j; StarSystem* system = region->System(); if (system) datapath = system->GetDataPath(); region->GetWeather().Update(); if (!patches) BuildTerrain(); if (patches) { for (i = 0; i < subdivisions; i++) for (j = 0; j < subdivisions; j++) if (patches[i*subdivisions+j]) scene.AddGraphic(patches[i*subdivisions+j]); } if (water_patches) { for (i = 0; i < subdivisions; i++) for (j = 0; j < subdivisions; j++) if (water_patches[i*subdivisions+j]) scene.AddGraphic(water_patches[i*subdivisions+j]); } if (aprons) { for (i = 0; i < 8; i++) if (aprons[i]) scene.AddGraphic(aprons[i]); } if (clouds) { for (i = 0; i < nclouds; i++) if (clouds[i]) scene.AddGraphic(clouds[i]); } } void Terrain::Deactivate(Scene& scene) { int i, j; if (patches) { for (i = 0; i < subdivisions; i++) { for (j = 0; j < subdivisions; j++) { TerrainPatch* p = patches[i*subdivisions+j]; if (p) { p->DeletePrivateData(); scene.DelGraphic(p); } } } } if (water_patches) { for (i = 0; i < subdivisions; i++) { for (j = 0; j < subdivisions; j++) { TerrainPatch* p = water_patches[i*subdivisions+j]; if (p) { p->DeletePrivateData(); scene.DelGraphic(p); } } } } if (aprons) { for (i = 0; i < 8; i++) if (aprons[i]) scene.DelGraphic(aprons[i]); } if (clouds) { for (i = 0; i < nclouds; i++) if (clouds[i]) scene.DelGraphic(clouds[i]); } StarSystem* system = region->System(); // restore sunlight color and brightness on exit: if (system) { system->RestoreTrueSunColor(); } } // +--------------------------------------------------------------------+ void Terrain::ExecFrame(double seconds) { if (water) { for (int i = 0; i < 6; i++) { if (water[i]) water[i]->CalcWaves(seconds); } } } // +--------------------------------------------------------------------+ void Terrain::SelectDetail(Projector* projector) { if (!patches) return; if (detail_frame >= Game::Frame()) return; // compute detail map: int x, z; for (z = 0; z < subdivisions; z++) { for (x = 0; x < subdivisions; x++) { TerrainPatch* patch = patches[z*subdivisions + x]; int ndetail = 0; Point loc = patch->Location(); float radius = patch->Radius(); if (loc.length() < 2*radius) { ndetail = detail_level; } else { double threshold = 4; //16; for (int level = 1; level <= detail_level; level++) { double feature_size = radius / (1 << level); if (projector->ApparentRadius(loc, (float) feature_size) > threshold) ndetail = level; } } patch->SetDetailLevel(ndetail); if (water_patches) { patch = water_patches[z*subdivisions + x]; if (patch) patch->SetDetailLevel(ndetail); } } } // compute fog fade level: double hour = region->DayPhase(); if (hour < 12) fog_fade = (hour) / 12.0; else fog_fade = (24-hour) / 12.0; fog_fade = fog_fade * (1-region->HazeFade()) + region->HazeFade(); detail_frame = Game::Frame(); } // +--------------------------------------------------------------------+ double Terrain::Height(double x, double y) const { double h = 0; if (patches) { int ix = (int) floor(x / (patch_size * scale)); int iy = (int) floor(y / (patch_size * scale)); double px = x - ix * patch_size * scale; double py = y - iy * patch_size * scale; ix = subdivisions/2 - ix; iy = subdivisions/2 + iy; TerrainPatch* patch = 0; if (ix >= 0 && ix < subdivisions && iy >= 0 && iy < subdivisions) patch = patches[iy*subdivisions+ix]; if (patch) h = patch->Height(px, py); } if (water_patches && h < 30) h = 30; return h; } // +--------------------------------------------------------------------+ void Terrain::SetDetailLevel(int detail) { if (detail >= 1 && detail <= 4) { // limit detail on low memory machines: if (detail > 3 && MachineInfo::GetTotalRam() < 64) detail = 3; detail_level = detail; } } // +--------------------------------------------------------------------+ bool Terrain::IsFirstPatch(TerrainPatch* p) const { return (patches && *patches == p); }