/// <summary>
/// Creates the CSG node network for the terrain generation.
/// </returns>
public override CsgNode createTerrain()
{
// Load and return a CsgNode based on the "Hills" expression resource. This will create some generic perlin-based hills.
CsgOpUnion union = new CsgOpUnion();
ExpressionResource expression = Resources.UseExpression("Hills", HostScript.ModDomain);
union.AddNode(new CsgExpression(MatGround.MaterialIndex, expression));
return union;
}
/// <summary>
/// Creates the CSG node network for the terrain generation.
/// </returns>
public CsgNode createTerrain()
{
// Load and return a CsgNode based on the "Hills" expression resource. This will create some generic perlin-based hills.
CsgOpConcat concat = new CsgOpConcat();
{
CsgOpUnion union = new CsgOpUnion();
StringBuilder hillsDefines = new StringBuilder();
// Introduce variables.
hillsDefines.Append("pos = vec3(x, y, z);");
// Import perlin noise.
hillsDefines.Append("perlins(x,y,z) $= ::Perlin;");
hillsDefines.Append("perlin(v) = perlins(v.x, v.y, v.z);");
// Hill structue.
//hillsDefines.Append("Hills = perlins(x / 300, 0.00001 * y, z / 300) + perlins(x / 100, 0.00001 * y, z / 100) * .5 + perlins(x / 30, 0.00001 * y, z / 30) * .25 + perlins(x / 10, 0.00001 * y, z / 10) * .05;");
hillsDefines.Append("Hills = perlins(x / 300, y / 300, z / 300) + perlins(x / 100, y / 100, z / 100) * .5 + perlins(x / 30, y / 30, z / 30) * .25 + perlins(x / 10, y / 10, z / 10) * .05;");
hillsDefines.Append("Hills = (Hills + 1).pow2 * 50;");
string hillsDef = hillsDefines.ToString();
CsgOpConcat groundTerrain = new CsgOpConcat();
{
CsgOpUnion groundTerrainFull = new CsgOpUnion();
groundTerrainFull.AddNode(new CsgExpression(terrainDirt.Index, "-1", UpvoidMiner.ModDomain));
groundTerrainFull.AddNode(new CsgExpression(terrainDesert.Index, hillsDef + "3 * perlins(x / 300, z / 300, y / 100)", UpvoidMiner.ModDomain));
CsgOpDiff groundTerrainDiff = new CsgOpDiff();
groundTerrainDiff.AddNode(new CsgExpression(1, "-y-90", UpvoidMiner.ModDomain));
groundTerrain.AddNode(groundTerrainFull);
groundTerrain.AddNode(groundTerrainDiff);
}
union.AddNode(new CsgExpression(terrainDirt.Index, hillsDef + "y + Hills", UpvoidMiner.ModDomain));
union.AddNode(groundTerrain);
union.AddNode(new CsgExpression(terrainRock.Index, hillsDef + "y + Hills + (5 + perlins(x / 5, z / 6, y / 7) * 3 + perlins(z / 45, y / 46, x / 47) * 13)", UpvoidMiner.ModDomain));
concat.AddNode(union);
}
{
CsgOpDiff diff = new CsgOpDiff();
StringBuilder caveDefines = new StringBuilder();
// Introduce variables.
caveDefines.Append("pos = vec3(x, y, z);");
// Import perlin noise.
caveDefines.Append("perlins(x,y,z) $= ::Perlin;");
caveDefines.Append("perlin(v) = perlins(v.x, v.y, v.z);");
// Cave structue.
//hillsDefines.Append("Hills = perlins(x / 300, 0.00001 * y, z / 300) + perlins(x / 100, 0.00001 * y, z / 100) * .5 + perlins(x / 30, 0.00001 * y, z / 30) * .25 + perlins(x / 10, 0.00001 * y, z / 10) * .05;");
caveDefines.Append("CaveDensity = clamp(perlins(x / 30, y / 30, z / 30) * 4, 0, 1);");
caveDefines.Append("CaveDensity = CaveDensity * clamp((y + 100) * .2, 0, 1);");
caveDefines.Append("Caves = (perlins(x / 17, y / 17, z / 17) + perlins(x / 6, y / 6, z / 6) * .5 - .2) + (5 - CaveDensity * 5);");
string caveDef = caveDefines.ToString();
diff.AddNode(new CsgExpression(1, caveDef + "Caves", UpvoidMiner.ModDomain));
concat.AddNode(diff);
}
//concat.AddNode(new CsgAutomatonNode(Resources.UseAutomaton("Trees", UpvoidMiner.ModDomain), world, 4));
//concat.AddNode(new CsgAutomatonNode(Resources.UseAutomaton("Cacti", UpvoidMiner.ModDomain), world, 4));
//concat.AddNode(new CsgAutomatonNode(Resources.UseAutomaton("Surface", UpvoidMiner.ModDomain), world, 4));
concat.AddNode(new CsgCollapseNode());
return(concat);
}
