//
// Exports this object.
//
public bool ExportGeometry(IntPtr scene)
{
if (NumVertices == 0 || NumTriangles == 0)
return false;
Phonon.Vector3[] vertices = new Phonon.Vector3[NumVertices];
Phonon.Triangle[] triangles = new Phonon.Triangle[NumTriangles];
if (AttachedMesh != null)
ExportMesh(vertices, triangles);
else if (AttachedTerrain != null)
ExportTerrain(vertices, triangles);
else
return false;
Phonon.Export.iplSetObjectVertices(scene, vertices.Length, vertices);
Phonon.Export.iplSetObjectTriangles(scene, triangles.Length, triangles);
return true;
}
public static extern Error iplSetObjectTriangles(IntPtr scene, int numTriangles, Triangle[] triangles);
//
// Exports a terrain.
//
void ExportTerrain(Phonon.Vector3[] vertices, Phonon.Triangle[] triangles)
{
int w = AttachedTerrain.terrainData.heightmapWidth;
int h = AttachedTerrain.terrainData.heightmapHeight;
int s = Mathf.Min(w - 1, Mathf.Min(h - 1, (int)Mathf.Pow(2.0f, (float)TerrainSimplificationLevel)));
if (s == 0)
s = 1;
w = ((w - 1) / s) + 1;
h = ((h - 1) / s) + 1;
Vector3 position = AttachedTerrain.transform.position;
float[,] heights = AttachedTerrain.terrainData.GetHeights(0, 0, AttachedTerrain.terrainData.heightmapWidth, AttachedTerrain.terrainData.heightmapHeight);
int vertexIndex = 0;
for (int v = 0; v < AttachedTerrain.terrainData.heightmapHeight; v += s)
{
for (int u = 0; u < AttachedTerrain.terrainData.heightmapWidth; u += s)
{
float height = heights[v, u];
float x = position.x + (((float) u / AttachedTerrain.terrainData.heightmapWidth) * AttachedTerrain.terrainData.size.x);
float y = position.y + (height * AttachedTerrain.terrainData.size.y);
float z = position.z + (((float) v / AttachedTerrain.terrainData.heightmapHeight) * AttachedTerrain.terrainData.size.z);
vertices[vertexIndex++] = Phonon.Common.ConvertVector(new Vector3 { x = x, y = y, z = z });
}
}
int triangleIndex = 0;
for (int v = 0; v < h - 1; ++v)
{
for (int u = 0; u < w - 1; ++u)
{
int i0 = v * w + u;
int i1 = (v + 1) * w + u;
int i2 = v * w + (u + 1);
triangles[triangleIndex++] = new Phonon.Triangle { index0 = i0, index1 = i1, index2 = i2 };
i0 = v * w + (u + 1);
i1 = (v + 1) * w + u;
i2 = (v + 1) * w + (u + 1);
triangles[triangleIndex++] = new Phonon.Triangle { index0 = i0, index1 = i1, index2 = i2 };
}
}
}
