private static void GenerateHills(ICollection <Polygon> polygons, IList <Vector3> vertices, PolySet landPolys, Color32 landColor, Color32 sideColor)
{
// Grab additional polygons to generate hills, but only from the set of polygons that are land.
PolySet hillPolys = PolySet.RemoveEdges(landPolys);
PolySet insetSides = Inset(polygons, vertices, hillPolys, 0.03f);
PolySet.ApplyColor(insetSides, landColor);
insetSides.ApplyAmbientOcclusionTerm(0.0f, 1.0f);
PolySet extrudeSides = Extrude(polygons, vertices, hillPolys, 0.05f);
PolySet.ApplyColor(extrudeSides, sideColor);
//Hills have dark ambient occlusion on the bottom, and light on top.
extrudeSides.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
}
public PlanetGenerator(GameObject _planet, Material m_GroundMaterial, Material m_OceanMaterial, bool withRocket)
{
planet = _planet;
if (!withRocket)
{
colorGrass = new Color32(99, 61, 72, 0);
colorDirt = new Color32(59, 30, 39, 0);
colorOcean = new Color32(26, 67, 92, 0);
colorDeepOcean = new Color32(11, 34, 48, 0);
}
landPolys = new PolySet();
m_Objects = new List <Polygon>();
// Create an icosahedron, subdivide it three times so that we have plenty of polys
// to work with.
InitAsIcosohedron();
Subdivide(3);
// When we begin extruding polygons, we'll need each one to know who its immediate
//neighbors are. Calculate that now.
CalculateNeighbors();
// By default, everything is colored blue. As we extrude land forms, we'll change their colors to match.
foreach (Polygon p in m_Polygons)
{
p.m_Color = colorOcean;
}
// Now we build a set of Polygons that will become the land. We do this by generating
// randomly sized spheres on the surface of the planet, and adding any Polygon that falls
// inside that sphere.
// Grab polygons that are inside random spheres. These will be the basis of our planet's continents.
for (int i = 0; i < m_NumberOfContinents; i++)
{
float continentSize = Random.Range(m_ContinentSizeMin, m_ContinentSizeMax);
Vector3 center = Random.onUnitSphere;
if (i == 0)
{
center.Set(-1, 0, 0);
}
PolySet newLand = GetPolysInSphere(center, continentSize, m_Polygons);
landPolys.UnionWith(newLand);
}
// While we're here, let's make a group of oceanPolys. It's pretty simple: Any Polygon that isn't in the landPolys set
// must be in the oceanPolys set instead.
var oceanPolys = new PolySet();
surfacePolys = new List <Polygon>();
foreach (Polygon poly in m_Polygons)
{
if (!landPolys.Contains(poly))
{
oceanPolys.Add(poly);
}
else
{
surfacePolys.Add(poly);
}
}
// Let's create the ocean surface as a separate mesh.
// First, let's make a copy of the oceanPolys so we can
// still use them to also make the ocean floor later.
// Back to land for a while! We start by making it green. =)
foreach (Polygon landPoly in landPolys)
{
landPoly.m_Color = colorGrass;
}
// The Extrude function will raise the land Polygons up out of the water.
// It also generates a strip of new Polygons to connect the newly raised land
// back down to the water level. We can color this vertical strip of land brown like dirt.
PolySet lowLandSides = Extrude(landPolys, 0.05f);
lowLandSides.ApplyColor(colorDirt);
lowLandSides.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
// Grab additional polygons to generate hills, but only from the set of polygons that are land.
PolySet hillPolys = landPolys.RemoveEdges();
PolySet insetLandPolys = Inset(hillPolys, 0.03f);
insetLandPolys.ApplyColor(colorGrass);
insetLandPolys.ApplyAmbientOcclusionTerm(0.0f, 1.0f);
PolySet topLandSides = Extrude(hillPolys, 0.05f);
topLandSides.ApplyColor(colorDirt);
//Hills have dark ambient occlusion on the bottom, and light on top.
topLandSides.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
landPolys.UnionWith(lowLandSides);
landPolys.UnionWith(insetLandPolys);
landPolys.UnionWith(topLandSides);
// Time to return to the oceans.
PolySet insetOceanPolys = Inset(oceanPolys, 0.05f);
insetOceanPolys.ApplyColor(colorOcean);
insetOceanPolys.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
PolySet highOceanSides = Extrude(oceanPolys, -0.02f);
highOceanSides.ApplyColor(colorOcean);
highOceanSides.ApplyAmbientOcclusionTerm(0.0f, 1.0f);
PolySet insetOceanPolys2 = Inset(oceanPolys, 0.02f);
insetOceanPolys2.ApplyColor(colorOcean);
insetOceanPolys2.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
var deepOceanPolys = oceanPolys.RemoveEdges();
PolySet lowOceanSides = Extrude(deepOceanPolys, -0.05f);
lowOceanSides.ApplyColor(colorDeepOcean);
deepOceanPolys.ApplyColor(colorDeepOcean);
oceanPolys.UnionWith(insetOceanPolys);
oceanPolys.UnionWith(highOceanSides);
oceanPolys.UnionWith(insetOceanPolys2);
oceanPolys.UnionWith(lowOceanSides);
PolySet allPolys = new PolySet(oceanPolys);
allPolys.UnionWith(landPolys);
// Okay, we're done! Let's generate an actual game mesh for this planet.
for (int i = 0; i < m_Vertices.Count; i++)
{
m_Vertices[i] *= 0.1f;
m_Vertices[i] += planet.transform.position;
}
//GenerateMesh(planet, oceanPolys, "Ocean Mesh", m_OceanMaterial);
GenerateMesh(planet, allPolys, "Ground Mesh", m_GroundMaterial);
}
private static Mesh GetGroundMesh(IList <Polygon> polygons, IList <Vector3> vertices, float continentSizeMin, float continentSizeMax, int numberOfContinents, Color32 landColor, Color32 sideColor,
Color32 oceanColor, Color32 deepOceanColor, bool isGenerateHills, bool isGenerateDeepOceans)
{
// Now we build a set of Polygons that will become the land. We do this by generating
// randomly sized spheres on the surface of the planet, and adding any Polygon that falls
// inside that sphere.
PolySet landPolys = CreateLand(polygons, vertices, continentSizeMin, continentSizeMax, numberOfContinents);
// While we're here, let's make a group of oceanPolys. It's pretty simple: Any Polygon that isn't in the landPolys set
// must be in the oceanPolys set instead.
PolySet oceanPolys = CreateOcean(polygons, landPolys);
// Let's create the ocean surface as a separate mesh.
// First, let's make a copy of the oceanPolys so we can
// still use them to also make the ocean floor later.
var oceanSurface = new PolySet(oceanPolys);
PolySet sides = Inset(polygons, vertices, oceanSurface, 0.05f);
PolySet.ApplyColor(sides, oceanColor);
sides.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
// Time to return to the oceans.
sides = Extrude(polygons, vertices, oceanPolys, -0.02f);
PolySet.ApplyColor(sides, oceanColor);
sides.ApplyAmbientOcclusionTerm(0.0f, 1.0f);
sides = Inset(polygons, vertices, oceanPolys, 0.02f);
PolySet.ApplyColor(sides, oceanColor);
sides.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
if (isGenerateDeepOceans)
{
var deepOceanPolys = PolySet.RemoveEdges(oceanPolys);
sides = Extrude(polygons, vertices, deepOceanPolys, -0.05f);
PolySet.ApplyColor(sides, deepOceanColor);
PolySet.ApplyColor(deepOceanPolys, deepOceanColor);
}
// Back to land for a while! We start by making it green. =)
PolySet.ApplyColor(landPolys, landColor);
// The Extrude function will raise the land Polygons up out of the water.
// It also generates a strip of new Polygons to connect the newly raised land
// back down to the water level. We can color this vertical strip of land brown like dirt.
sides = Extrude(polygons, vertices, landPolys, 0.05f);
PolySet.ApplyColor(sides, sideColor);
sides.ApplyAmbientOcclusionTerm(1.0f, 0.0f);
if (isGenerateHills)
{
GenerateHills(polygons, vertices, landPolys, landColor, sideColor);
}
return(GenerateMesh("Ground Mesh", polygons, vertices));
}