/// <summary>
/// Get a point on the flattening plane and flatten the terrain around it
/// </summary>
private void FlattenTerrain()
{
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(_flatteningOrigin, _flatteningNormal, playerCamera.position, playerCamera.forward, out float3 intersectionPoint);
if (result != PlaneLineIntersectionResult.OneHit)
{
return;
}
float flattenOffset = 0;
// This is a bit hacky. One fix could be that the VoxelMesher class has a flattenOffset property, but I'm not sure if that's a good idea either.
if (voxelWorld.VoxelMesher is MarchingCubesMesher marchingCubesMesher)
{
flattenOffset = marchingCubesMesher.Isolevel;
}
int intRange = (int)math.ceil(deformRange);
int size = 2 * intRange + 1;
int3 queryPosition = (int3)(intersectionPoint - new int3(intRange));
BoundsInt worldSpaceQuery = new BoundsInt(queryPosition.ToVectorInt(), new Vector3Int(size, size, size));
voxelWorld.VoxelDataStore.SetVoxelDataCustom(worldSpaceQuery, (voxelDataWorldPosition, voxelData) =>
{
float distance = math.distance(voxelDataWorldPosition, intersectionPoint);
if (distance > deformRange)
{
return(voxelData);
}
float voxelDataChange = (math.dot(_flatteningNormal, voxelDataWorldPosition) - math.dot(_flatteningNormal, _flatteningOrigin)) / deformRange;
return((byte)math.clamp(((voxelDataChange * 0.5f + voxelData / 255f - flattenOffset) * 0.8f + flattenOffset) * 255, 0, 255));
});
}
public void Line_At_1_0_0_Plane_At_0_0_0_Custom_Angle_Should_Be_1_Negative2_0()
{
float3 planeOrigin = new float3(0, 0, 0);
float3 planeNormal = math.normalize(new float3(1, 0.5f, 0));
float3 lineOrigin = new float3(1, 0, 0);
float3 lineDirection = new float3(0, -1, 0);
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(planeOrigin, planeNormal, lineOrigin, lineDirection, out float3 intersectionPoint);
Assert.AreEqual(new float3(1, -2, 0), intersectionPoint);
}
public void Line_Above_Directly_Down_Result_Should_Be_OneHit()
{
float3 planeOrigin = new float3(0, 0, 0);
float3 planeNormal = math.normalize(new float3(0, 1, 0));
float3 lineOrigin = new float3(0, 10, 0);
float3 lineDirection = new float3(0, -1, 0);
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(planeOrigin, planeNormal, lineOrigin, lineDirection, out float3 intersectionPoint);
Assert.AreEqual(PlaneLineIntersectionResult.OneHit, result);
}
public void Line_Parallel_To_Plane_Inside_Result_Should_Be_ParallelInsidePlane()
{
float3 planeOrigin = new float3(0, 4, 0);
float3 planeNormal = math.normalize(new float3(0, 1, 0));
float3 lineOrigin = new float3(0, 4, 0);
float3 lineDirection = new float3(1, 0, 0);
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(planeOrigin, planeNormal, lineOrigin, lineDirection, out float3 intersectionPoint);
Assert.AreEqual(PlaneLineIntersectionResult.ParallelInsidePlane, result);
}
public void Line_At_10_4_5_Directly_Down_Should_Hit_10_0_5()
{
float3 planeOrigin = new float3(0, 0, 0);
float3 planeNormal = math.normalize(new float3(0, 1, 0));
float3 lineOrigin = new float3(10, 4, 5);
float3 lineDirection = new float3(0, -1, 0);
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(planeOrigin, planeNormal, lineOrigin, lineDirection, out float3 intersectionPoint);
Assert.AreEqual(new float3(10, 0, 5), intersectionPoint);
}
/// <summary>
/// Get a point on the flattening plane and flatten the terrain around it
/// </summary>
private void FlattenTerrain()
{
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(_flatteningOrigin, _flatteningNormal, playerCamera.position, playerCamera.forward, out float3 intersectionPoint);
if (result != PlaneLineIntersectionResult.OneHit)
{
return;
}
int intRange = (int)math.ceil(deformRange);
for (int x = -intRange; x <= intRange; x++)
{
for (int y = -intRange; y <= intRange; y++)
{
for (int z = -intRange; z <= intRange; z++)
{
int3 localPosition = new int3(x, y, z);
float3 offsetPoint = intersectionPoint + localPosition;
float distance = math.distance(offsetPoint, intersectionPoint);
if (distance > deformRange)
{
continue;
}
int3 voxelDataWorldPosition = (int3)offsetPoint;
if (voxelDataStore.TryGetVoxelData(voxelDataWorldPosition, out float oldVoxelData))
{
float voxelDataChange = (math.dot(_flatteningNormal, voxelDataWorldPosition) - math.dot(_flatteningNormal, _flatteningOrigin)) / deformRange;
voxelDataStore.SetVoxelData((voxelDataChange * 0.5f + oldVoxelData) * 0.8f, voxelDataWorldPosition);
}
}
}
}
}
private static void TestPlaneLineIntersectionResult(float3 planeOrigin, float3 planeNormal, float3 lineOrigin, float3 lineDirection, PlaneLineIntersectionResult expected)
{
PlaneLineIntersectionResult result = IntersectionUtilities.PlaneLineIntersection(planeOrigin, math.normalize(planeNormal), lineOrigin, lineDirection, out _);
Assert.AreEqual(expected, result);
}
