//a==dirt
public static void DirtToGrass(DynamicMesh mesh, RenderTile a, RenderTile b, RenderTile c)
{
Vector3 abMid = (a.position + b.position) * 0.5f;
Vector3 acMid = (a.position + c.position) * 0.5f;
Vector3 abGround = new Vector3(abMid.x, a.position.y, abMid.z);
Vector3 acGround = new Vector3(acMid.x, a.position.y, acMid.z);
mesh.SimpleTriangle(a.position, abGround, acGround, a.color, a.color, a.color, a.normal, a.normal, a.normal);
mesh.SimpleTriangle(acGround, abGround, abMid, a.color, a.color, b.color, c.normal, b.normal, b.normal);
mesh.SimpleTriangle(acGround, abMid, acMid, a.color, b.color, c.color, c.normal, b.normal, c.normal);
mesh.SimpleTriangle(acMid, abMid, b.position, c.color, b.color, b.color, c.normal, b.normal, b.normal);
mesh.SimpleTriangle(acMid, b.position, c.position, c.color, b.color, c.color, c.normal, b.normal, c.normal);
}
public static void RenderTriangle(DynamicMesh mesh, RenderTile a, RenderTile b, RenderTile c)
{
TerrainType tA = a.GetTerrain();
TerrainType tB = b.GetTerrain();
TerrainType tC = c.GetTerrain();
if (tA == tB && tA == tC)
{
//No terrain transition
mesh.SimpleTriangle(a.position, b.position, c.position, a.color, b.color, c.color, a.normal, b.normal, c.normal);
}
else
{
//NOTE: Currently I assume height goes: sand, dirt, grass. Height transitions could also be added
//Terrain transition. TODO: cache all combination
if (tB == tC)
{
//A unique
if (tA == TerrainType.Grass && tB == TerrainType.Dirt)
{
GrassToDirt(mesh, a, b, c);
return;
}
else if (tA == TerrainType.Dirt && tB == TerrainType.Grass)
{
DirtToGrass(mesh, a, b, c);
return;
}
}
else if (tA == tC)
{
//B unique
if (tB == TerrainType.Grass && tC == TerrainType.Dirt)
{
GrassToDirt(mesh, b, c, a);
return;
}
else if (tB == TerrainType.Dirt && tC == TerrainType.Grass)
{
DirtToGrass(mesh, b, c, a);
return;
}
}
else if (tA == tB)
{
//C unique
if (tC == TerrainType.Grass && tA == TerrainType.Dirt)
{
GrassToDirt(mesh, c, a, b);
return;
}
else if (tC == TerrainType.Dirt && tA == TerrainType.Grass)
{
DirtToGrass(mesh, c, a, b);
return;
}
}
else
{
//All unique
}
mesh.SimpleTriangle(a.position, b.position, c.position, a.color, b.color, c.color, a.normal, b.normal, c.normal);
}
}