public VoxelCollision(VoxelGeometry voxel, Transform transform, BoundingBox bounds)
{
geometry = voxel;
transformation = transform;
boundsWorldSpaceCollision = bounds;
boundsWorldSpaceCollision.Min = bounds.Min * 1.5f;
boundsWorldSpaceCollision.Max = bounds.Max * 1.5f;
}
public VoxelCollision(VoxelGeometry voxel, Transform transform, BoundingBox bounds, Scene scene)
{
geometry = voxel;
transformation = transform;
this.scene = scene;
boundsWorldSpaceCollision = bounds;
boundsWorldSpaceCollision.Min = bounds.Min * 1.5f;
boundsWorldSpaceCollision.Max = bounds.Max * 1.5f;
if (geometry.CanRender)
{
//GenerateCollisionMesh();
}
}
void InitializeVoxels()
{
int voxelCountX = (DensityFieldWidth - 1) / VoxelGridSize;
int voxelCountY = (DensityFieldHeight - 1) / VoxelGridSize;
int voxelCountZ = (DensityFieldDepth - 1) / VoxelGridSize;
Voxels = new VoxelGeometry[voxelCountX * voxelCountY * voxelCountZ];
VoxelBounds = new BoundingBox[Voxels.Length];
voxelKDTree = new KDTree<VoxelElement>(VoxelCompareFunction, VoxelBoundsFunction, false, true);
Vector3 ratio = Vector3.One * 2.0f * (float)VoxelGridSize / new Vector3(DensityFieldWidth-1,DensityFieldHeight-1,DensityFieldDepth-1);
for (int z = 0; z < voxelCountZ; z++)
{
int zOff = voxelCountX * voxelCountY * z;
for (int y = 0; y < voxelCountY; y++)
{
int yOff = voxelCountX * y;
for (int x = 0; x < voxelCountX; x++)
{
int idx = x + yOff + zOff;
/*
VoxelBounds[idx] = new BoundingBox(new Vector3(x, y, z) * ratio - Vector3.One, new Vector3(x + 1, y + 1, z + 1) * ratio - Vector3.One);
VoxelBounds[idx].Min = Vector3.Transform(VoxelBounds[idx].Min, Transformation.GetTransform());
VoxelBounds[idx].Max = Vector3.Transform(VoxelBounds[idx].Max, Transformation.GetTransform());
*/
Voxels[idx] = new VoxelGeometry((ushort)idx);
Voxels[idx].renderElement.Transform = new Matrix[1] { Transformation.GetTransform() };
Vector3 geometryRatio = 2.0f*Vector3.One / new Vector3(DensityFieldWidth-1,DensityFieldHeight-1,DensityFieldDepth-1);
Voxels[idx].GenerateGeometry(ref DensityField, IsoValue, DensityFieldWidth, DensityFieldHeight, DensityFieldDepth, VoxelGridSize, VoxelGridSize, VoxelGridSize, x * VoxelGridSize, y * VoxelGridSize, z * VoxelGridSize, geometryRatio, this.Transformation.GetTransform());
VoxelBounds[idx] = MathUtils.TransformBounds(Voxels[idx].GetBounds(), Transformation.GetTransform());
if(Voxels[idx].CanRender)
voxelKDTree.AddElement(new VoxelElement(Voxels[idx], VoxelBounds[idx]), false);
}
}
}
voxelKDTree.BuildTree();
RecursivelyBuildBounds(voxelKDTree.GetRoot());
terrainQuadMaterial = ResourceManager.Inst.GetMaterial("TerrainQuadMaterial");
giantQuadElement = GFXPrimitives.Decal.GetRenderElement();
Matrix quadMatrix = Matrix.CreateScale(1.5f) * Matrix.CreateRotationX(MathHelper.Pi) * this.Transformation.GetTransform();
quadMatrix.Translation = Vector3.Up * this.Transformation.GetBounds().Min.Y;
giantQuadElement.Transform = new Matrix[1] { quadMatrix };
}
void GenerateCollisionMesh(VoxelGeometry geometry)
{
List<Vector3> vertices = new List<Vector3>(geometry.verts.Length);
List<TriangleVertexIndices> indices = new List<TriangleVertexIndices>(geometry.ib.Length / 3);
Matrix transform = this.Transformation.GetTransform();
for (int i = 0; i < geometry.verts.Length; i++)
vertices.Add(Vector3.Transform(geometry.verts[i].Position, transform));
for (int i = 0; i < geometry.ib.Length; i += 3)
{
TriangleVertexIndices tri = new TriangleVertexIndices(geometry.ib[i + 2], geometry.ib[i + 1], geometry.ib[i]);
indices.Add(tri);
}
TriangleMesh collisionMesh = new TriangleMesh(vertices, indices);
CollisionSkin collision = new CollisionSkin(null);
collision.AddPrimitive(collisionMesh, (int)MaterialTable.MaterialID.NotBouncyRough);
CollisionSkin collision2 = new CollisionSkin(null);
collision2.AddPrimitive(new JigLibX.Geometry.Plane(Vector3.Up, Transformation.GetBounds().Min.Y-3f), (int)MaterialTable.MaterialID.NotBouncyRough);
scene.GetPhysicsEngine().CollisionSystem.AddCollisionSkin(collision);
//scene.GetPhysicsEngine().CollisionSystem.AddCollisionSkin(collision2);
}
static int SceneCompareFunction(VoxelGeometry elementA, VoxelGeometry elementB, int axis)
{
BoundingBox boundsA = elementA.GetBounds();//.Transform.TransformBounds(elementA.Mesh.GetBounds());
Vector3 posA = (boundsA.Max + boundsA.Min) * 0.5f;// elementA.Transform.GetPosition();
float valueA = (axis == 0) ? posA.X : (axis == 1) ? posA.Y : posA.Z;
BoundingBox boundsB = elementB.GetBounds();//.Transform.TransformBounds(elementB.Mesh.GetBounds());
Vector3 posB = (boundsB.Max + boundsB.Min) * 0.5f;//elementB.Transform.GetPosition();
float valueB = (axis == 0) ? posB.X : (axis == 1) ? posB.Y : posB.Z;
if (valueA < valueB)
return -1;
if (valueA > valueB)
return 1;
return 0;
}
static Vector2 SceneBoundsFunction(VoxelGeometry element, int axis)
{
BoundingBox bounds = element.GetBounds();//.Transform.TransformBounds(element.Mesh.GetBounds());
return (axis == 0) ? new Vector2(bounds.Min.X, bounds.Max.X) : ((axis == 1) ? new Vector2(bounds.Min.Y, bounds.Max.Y) : new Vector2(bounds.Min.Z, bounds.Max.Z));
}
public VoxelElement(VoxelGeometry geometry, BoundingBox bounds)
{
this.geometry = geometry;
this.bounds = bounds;
}
void generateGem(Vector3 position)
{
position.Y = position.Y + 2.0f;
float radiusMax = (DensityFieldSize / 2);
float radiusMin = (DensityFieldSize / 16);
Vector3 cylinderCenter = Vector3.One * DensityFieldSize * 0.5f;
minPos = maxPos = cylinderCenter;
DensityField = new byte[DensityFieldSize * DensityFieldSize * DensityFieldSize];
for (int x = 0; x < DensityFieldSize; x++)
{
for (int y = 1; y < (DensityFieldSize - 1); y++)
{
for (int z = 0; z < DensityFieldSize; z++)
{
Vector3 pos = new Vector3(x, y, z);
float offset = Math.Abs(pos.Y - cylinderCenter.Y);
pos.Y = cylinderCenter.Y;
float radius = MathHelper.Lerp(radiusMax, radiusMin, offset/cylinderCenter.Y);
float density = Math.Max(1.0f - (pos - cylinderCenter).Length() / (radius), 0.0f);
if (density > 0.0f)
{
pos = (pos / DensityFieldSize) * 2.0f - Vector3.One;
minPos = Vector3.Min(pos, minPos);
maxPos = Vector3.Max(pos, maxPos);
}
DensityField[x + (y + z * DensityFieldSize) * DensityFieldSize] = (byte)(density * 255.0f);
}
}
}
gemGeometry = new VoxelGeometry();
gemGeometry.renderElement.Transform = new Matrix[1] { Matrix.CreateScale(5.0f) * Matrix.CreateTranslation(position) };
gemGeometry.GenerateGeometry(ref DensityField, IsoValue, DensityFieldSize, DensityFieldSize, DensityFieldSize, DensityFieldSize - 1, DensityFieldSize - 1, DensityFieldSize - 1, 0, 0, 0, 2.0f / (float)(DensityFieldSize - 1));
boundingBox = new BoundingBox();
boundingBox.Max = Vector3.Transform(maxPos, gemGeometry.renderElement.Transform[0]);
boundingBox.Min = Vector3.Transform(minPos, gemGeometry.renderElement.Transform[0]);
collected = false;
Vector3 lightPosition = position;
lightPosition.X = position.X + 12.0f;
emitterLight = new Light(LightType.Point, new Vector3(0.83f, 0.06f, 0.36f), lightPosition, false);
emitterLight.Parameters = new Vector4(70, 45, 0, 0);
}
void InitializeVoxels()
{
int voxelCount = (DensityFieldSize - 1) / VoxelGridSize;
Voxels = new VoxelGeometry[voxelCount * voxelCount * voxelCount];
VoxelBounds = new BoundingBox[Voxels.Length];
float ratio = 2.0f * (float)VoxelGridSize / (float)(DensityFieldSize - 1);
for (int z = 0; z < voxelCount; z++)
{
int zOff = voxelCount * voxelCount * z;
for (int y = 0; y < voxelCount; y++)
{
int yOff = voxelCount * y;
for (int x = 0; x < voxelCount; x++)
{
int idx = x + yOff + zOff;
VoxelBounds[idx] = new BoundingBox(new Vector3(x, y, z) * ratio - Vector3.One, new Vector3(x + 1, y + 1, z + 1) * ratio - Vector3.One);
VoxelBounds[idx].Min = Vector3.Transform(VoxelBounds[idx].Min, Transformation.GetTransform());
VoxelBounds[idx].Max = Vector3.Transform(VoxelBounds[idx].Max, Transformation.GetTransform());
Voxels[idx] = new VoxelGeometry();
Voxels[idx].renderElement.Transform = new Matrix[1] { Transformation.GetTransform() };
Voxels[idx].GenerateGeometry(ref DensityField, IsoValue, DensityFieldSize, DensityFieldSize, DensityFieldSize, VoxelGridSize, VoxelGridSize, VoxelGridSize, x * VoxelGridSize, y * VoxelGridSize, z * VoxelGridSize, 2.0f / (float)(DensityFieldSize - 1));
}
}
}
}
void GenerateGeometry()
{
byte[] DensityField;
int DensityFieldSize = 17;
byte IsoValue = 127;
DensityField = new byte[DensityFieldSize * DensityFieldSize * DensityFieldSize];
Vector3 center = Vector3.One * DensityFieldSize * 0.5f;
Vector3 minPos = center;
Vector3 maxPos = center;
float radius = DensityFieldSize / 2;
for (int x = 0; x < DensityFieldSize; x++)
{
for (int y = 1; y < (DensityFieldSize - 1); y++)
{
for (int z = 0; z < DensityFieldSize; z++)
{
Vector3 pos = new Vector3(x, y, z);
float density = MathHelper.Clamp(1.0f-(pos-center).Length()/radius, 0, 1);
if (density > 0.0f)
{
pos = (pos / DensityFieldSize) * 2.0f - Vector3.One;
minPos = Vector3.Min(pos, minPos);
maxPos = Vector3.Max(pos, maxPos);
}
DensityField[x + (y + z * DensityFieldSize) * DensityFieldSize] = (byte)(density * 255.0f);
}
}
}
Geometry = new VoxelGeometry();
Vector3 ratio = 2.0f * Vector3.One / (float)(DensityFieldSize - 1);
Geometry.GenerateGeometry(ref DensityField, IsoValue, DensityFieldSize, DensityFieldSize, DensityFieldSize, DensityFieldSize - 1, DensityFieldSize - 1, DensityFieldSize - 1, 0, 0, 0, ratio, Matrix.Identity);
}
void GenerateGeometry()
{
byte[] DensityField;
int DensityFieldSize = 17;
byte IsoValue = 127;
float radiusMax = (DensityFieldSize / 2);
float radiusMin = (DensityFieldSize / 16);
Vector3 cylinderCenter = Vector3.One * DensityFieldSize * 0.5f;
Vector3 minPos, maxPos;
minPos = maxPos = cylinderCenter;
DensityField = new byte[DensityFieldSize * DensityFieldSize * DensityFieldSize];
for (int x = 0; x < DensityFieldSize; x++)
{
for (int y = 1; y < (DensityFieldSize - 1); y++)
{
for (int z = 0; z < DensityFieldSize; z++)
{
Vector3 pos = new Vector3(x, y, z);
float offset = Math.Abs(pos.Y - cylinderCenter.Y);
pos.Y = cylinderCenter.Y;
float radius = MathHelper.Lerp(radiusMax, radiusMin, offset / cylinderCenter.Y);
float density = Math.Max(1.0f - (pos - cylinderCenter).Length() / (radius), 0.0f);
if (density > 0.0f)
{
pos = (pos / DensityFieldSize) * 2.0f - Vector3.One;
minPos = Vector3.Min(pos, minPos);
maxPos = Vector3.Max(pos, maxPos);
}
DensityField[x + (y + z * DensityFieldSize) * DensityFieldSize] = (byte)(density * 255.0f);
}
}
}
Geometry = new VoxelGeometry();
Vector3 ratio = Vector3.One * 2.0f / (float)(DensityFieldSize - 1);
Geometry.GenerateGeometry(ref DensityField, IsoValue, DensityFieldSize, DensityFieldSize, DensityFieldSize, DensityFieldSize - 1, DensityFieldSize - 1, DensityFieldSize - 1, 0, 0, 0, ratio, Matrix.Identity);
}
void GenerateGeometry()
{
byte[] DensityField;
int DensityFieldSize = 17;
byte IsoValue = 127;
DensityField = new byte[DensityFieldSize * DensityFieldSize * DensityFieldSize];
Vector3 center = Vector3.One * DensityFieldSize * 0.5f;
Vector3 minPos = center;
Vector3 maxPos = center;
float radiusInner = DensityFieldSize / 6;
float numSpikes = 5;
float period = MathHelper.TwoPi * numSpikes;
float minRad = DensityFieldSize / 4;
float maxRad = DensityFieldSize / 3;
for (int x = 0; x < DensityFieldSize; x++)
{
for (int y = 1; y < (DensityFieldSize - 1); y++)
{
for (int z = 0; z < DensityFieldSize; z++)
{
Vector3 pos = new Vector3(x, y, z);
float innerRingTerm = (1.0f - new Vector2(pos.X-center.X, pos.Y-center.Y).Length() / radiusInner);
float innerRing = (innerRingTerm > 0.0f) ? 1 : 0;
float zElem = Math.Abs((z - center.Z) / center.Z);
float sinTerm = (float)Math.Sin(period * zElem);
float cosTerm = (float)Math.Cos(period * zElem);
float radiusOuter = minRad;
if (cosTerm <= 0.0f)
{
radiusOuter = MathHelper.Lerp(minRad, maxRad, 1.0f + cosTerm);
}
float outerRingTerm = (1.0f - new Vector2(pos.X - center.X, pos.Y - center.Y).Length() / radiusOuter);
float density = MathHelper.Clamp(outerRingTerm-innerRing, 0, 1);
if (density > 0.0f)
{
pos = (pos / DensityFieldSize) * 2.0f - Vector3.One;
minPos = Vector3.Min(pos, minPos);
maxPos = Vector3.Max(pos, maxPos);
}
DensityField[x + (y + z * DensityFieldSize) * DensityFieldSize] = (byte)(density * 255.0f);
}
}
}
gateGeometry = new VoxelGeometry();
gateGeometry.renderElement.Transform = new Matrix[1] { this.Transformation.GetTransform() };
gateGeometry.GenerateGeometry(ref DensityField, IsoValue, DensityFieldSize, DensityFieldSize, DensityFieldSize, DensityFieldSize - 1, DensityFieldSize - 1, DensityFieldSize - 1, 0, 0, 0, 2.0f / (float)(DensityFieldSize - 1));
bounds = new BoundingBox();
bounds.Max = Vector3.Transform(maxPos, this.Transformation.GetTransform());
bounds.Min = Vector3.Transform(minPos, this.Transformation.GetTransform());
}
void InitializeVoxels()
{
int voxelCountX = (DensityFieldWidth - 1) / VoxelGridSize;
int voxelCountY = (DensityFieldHeight - 1) / VoxelGridSize;
int voxelCountZ = (DensityFieldDepth - 1) / VoxelGridSize;
Voxels = new VoxelGeometry[voxelCountX * voxelCountY * voxelCountZ];
VoxelBounds = new BoundingBox[Voxels.Length];
Vector3 ratio = Vector3.One * 2.0f * (float)VoxelGridSize / new Vector3(DensityFieldWidth-1,DensityFieldHeight-1,DensityFieldDepth-1);
for (int z = 0; z < voxelCountZ; z++)
{
int zOff = voxelCountX * voxelCountY * z;
for (int y = 0; y < voxelCountY; y++)
{
int yOff = voxelCountX * y;
for (int x = 0; x < voxelCountX; x++)
{
int idx = x + yOff + zOff;
VoxelBounds[idx] = new BoundingBox(new Vector3(x, y, z) * ratio - Vector3.One, new Vector3(x + 1, y + 1, z + 1) * ratio - Vector3.One);
VoxelBounds[idx].Min = Vector3.Transform(VoxelBounds[idx].Min, Transformation.GetTransform());
VoxelBounds[idx].Max = Vector3.Transform(VoxelBounds[idx].Max, Transformation.GetTransform());
Voxels[idx] = new VoxelGeometry();
Voxels[idx].renderElement.Transform = new Matrix[1] { Transformation.GetTransform() };
Vector3 geometryRatio = 2.0f*Vector3.One / new Vector3(DensityFieldWidth-1,DensityFieldHeight-1,DensityFieldDepth-1);
Voxels[idx].GenerateGeometry(ref DensityField, IsoValue, DensityFieldWidth, DensityFieldHeight, DensityFieldDepth, VoxelGridSize, VoxelGridSize, VoxelGridSize, x * VoxelGridSize, y * VoxelGridSize, z * VoxelGridSize, geometryRatio, this.Transformation.GetTransform());
}
}
}
}
