private void CreateTrimeshGround()
{
const float scale = 20.0f;
//create a triangle-mesh ground
const int NumVertsX = 20;
const int NumVertsY = 20;
const int totalVerts = NumVertsX * NumVertsY;
const int totalTriangles = 2 * (NumVertsX - 1) * (NumVertsY - 1);
_groundVertexArray = new TriangleIndexVertexArray();
_groundMesh = new IndexedMesh();
_groundMesh.Allocate(totalTriangles, totalVerts);
_groundMesh.NumTriangles = totalTriangles;
_groundMesh.NumVertices = totalVerts;
_groundMesh.TriangleIndexStride = 3 * sizeof(int);
_groundMesh.VertexStride = Vector3.SizeInBytes;
using (var indicesStream = _groundMesh.GetTriangleStream())
{
var indices = new BinaryWriter(indicesStream);
for (int i = 0; i < NumVertsX - 1; i++)
{
for (int j = 0; j < NumVertsY - 1; j++)
{
indices.Write(j * NumVertsX + i);
indices.Write(j * NumVertsX + i + 1);
indices.Write((j + 1) * NumVertsX + i + 1);
indices.Write(j * NumVertsX + i);
indices.Write((j + 1) * NumVertsX + i + 1);
indices.Write((j + 1) * NumVertsX + i);
}
}
indices.Dispose();
}
using (var vertexStream = _groundMesh.GetVertexStream())
{
var vertices = new BinaryWriter(vertexStream);
for (int i = 0; i < NumVertsX; i++)
{
for (int j = 0; j < NumVertsY; j++)
{
const float waveLength = .2f;
float height = (float)(Math.Sin(i * waveLength) * Math.Cos(j * waveLength));
vertices.Write(i - NumVertsX * 0.5f);
vertices.Write(height);
vertices.Write(j - NumVertsY * 0.5f);
}
}
vertices.Dispose();
}
_groundVertexArray.AddIndexedMesh(_groundMesh);
var groundShape = new BvhTriangleMeshShape(_groundVertexArray, true);
var groundScaled = new ScaledBvhTriangleMeshShape(groundShape, new Vector3(scale));
RigidBody ground = PhysicsHelper.CreateStaticBody(Matrix.Identity, groundScaled, World);
ground.UserObject = "Ground";
Matrix vehicleTransform = Matrix.Translation(0, -2, 0);
CreateVehicle(vehicleTransform);
}
protected override void OnInitializePhysics()
{
CollisionShape groundShape = new BoxShape(50, 3, 50);
CollisionShapes.Add(groundShape);
CollisionConf = new DefaultCollisionConfiguration();
Dispatcher = new CollisionDispatcher(CollisionConf);
Solver = new SequentialImpulseConstraintSolver();
Vector3 worldMin = new Vector3(-10000, -10000, -10000);
Vector3 worldMax = new Vector3(10000, 10000, 10000);
Broadphase = new AxisSweep3(worldMin, worldMax);
//Broadphase = new DbvtBroadphase();
World = new DiscreteDynamicsWorld(Dispatcher, Broadphase, Solver, CollisionConf);
int i;
Matrix tr;
Matrix vehicleTr;
//if (UseTrimeshGround)
{
const float scale = 20.0f;
//create a triangle-mesh ground
const int NumVertsX = 20;
const int NumVertsY = 20;
const int totalVerts = NumVertsX * NumVertsY;
const int totalTriangles = 2 * (NumVertsX - 1) * (NumVertsY - 1);
TriangleIndexVertexArray vertexArray = new TriangleIndexVertexArray();
IndexedMesh mesh = new IndexedMesh();
mesh.Allocate(totalTriangles, totalVerts);
mesh.NumTriangles = totalTriangles;
mesh.NumVertices = totalVerts;
mesh.TriangleIndexStride = 3 * sizeof(int);
mesh.VertexStride = Vector3.SizeInBytes;
using (var indicesStream = mesh.GetTriangleStream())
{
var indices = new BinaryWriter(indicesStream);
for (i = 0; i < NumVertsX - 1; i++)
{
for (int j = 0; j < NumVertsY - 1; j++)
{
indices.Write(j * NumVertsX + i);
indices.Write(j * NumVertsX + i + 1);
indices.Write((j + 1) * NumVertsX + i + 1);
indices.Write(j * NumVertsX + i);
indices.Write((j + 1) * NumVertsX + i + 1);
indices.Write((j + 1) * NumVertsX + i);
}
}
indices.Dispose();
}
using (var vertexStream = mesh.GetVertexStream())
{
var vertices = new BinaryWriter(vertexStream);
for (i = 0; i < NumVertsX; i++)
{
for (int j = 0; j < NumVertsY; j++)
{
float wl = .2f;
float height = 20.0f * (float)(Math.Sin(i * wl) * Math.Cos(j * wl));
vertices.Write((i - NumVertsX * 0.5f) * scale);
vertices.Write(height);
vertices.Write((j - NumVertsY * 0.5f) * scale);
}
}
vertices.Dispose();
}
vertexArray.AddIndexedMesh(mesh);
groundShape = new BvhTriangleMeshShape(vertexArray, true);
tr = Matrix.Identity;
vehicleTr = Matrix.Translation(0, -2, 0);
}/*
* else
* {
* // Use HeightfieldTerrainShape
*
* int width = 40, length = 40;
* //int width = 128, length = 128; // Debugging is too slow for this
* float maxHeight = 10.0f;
* float heightScale = maxHeight / 256.0f;
* Vector3 scale = new Vector3(20.0f, maxHeight, 20.0f);
*
* //PhyScalarType scalarType = PhyScalarType.PhyUChar;
* //FileStream file = new FileStream(heightfieldFile, FileMode.Open, FileAccess.Read);
*
* // Use float data
* PhyScalarType scalarType = PhyScalarType.PhyFloat;
* byte[] terr = new byte[width * length * 4];
* MemoryStream file = new MemoryStream(terr);
* BinaryWriter writer = new BinaryWriter(file);
* for (i = 0; i < width; i++)
* for (int j = 0; j < length; j++)
* writer.Write((float)((maxHeight / 2) + 4 * Math.Sin(j * 0.5f) * Math.Cos(i)));
* writer.Flush();
* file.Position = 0;
*
* HeightfieldTerrainShape heightterrainShape = new HeightfieldTerrainShape(width, length,
* file, heightScale, 0, maxHeight, upIndex, scalarType, false);
* heightterrainShape.SetUseDiamondSubdivision(true);
*
* groundShape = heightterrainShape;
* groundShape.LocalScaling = new Vector3(scale.X, 1, scale.Z);
*
* tr = Matrix.Translation(new Vector3(-scale.X / 2, scale.Y / 2, -scale.Z / 2));
* vehicleTr = Matrix.Translation(new Vector3(20, 3, -3));
*
*
* // Create graphics object
*
* file.Position = 0;
* BinaryReader reader = new BinaryReader(file);
*
* int totalTriangles = (width - 1) * (length - 1) * 2;
* int totalVerts = width * length;
*
* game.groundMesh = new Mesh(game.Device, totalTriangles, totalVerts,
* MeshFlags.SystemMemory | MeshFlags.Use32Bit, VertexFormat.Position | VertexFormat.Normal);
* SlimDX.DataStream data = game.groundMesh.LockVertexBuffer(LockFlags.None);
* for (i = 0; i < width; i++)
* {
* for (int j = 0; j < length; j++)
* {
* float height;
* if (scalarType == PhyScalarType.PhyFloat)
* {
* // heightScale isn't applied internally for float data
* height = reader.ReadSingle();
* }
* else if (scalarType == PhyScalarType.PhyUChar)
* {
* height = file.ReadByte() * heightScale;
* }
* else
* {
* height = 0.0f;
* }
*
* data.Write((j - length * 0.5f) * scale.X);
* data.Write(height);
* data.Write((i - width * 0.5f) * scale.Z);
*
* // Normals will be calculated later
* data.Position += 12;
* }
* }
* game.groundMesh.UnlockVertexBuffer();
* file.Close();
*
* data = game.groundMesh.LockIndexBuffer(LockFlags.None);
* for (i = 0; i < width - 1; i++)
* {
* for (int j = 0; j < length - 1; j++)
* {
* // Using diamond subdivision
* if ((j + i) % 2 == 0)
* {
* data.Write(j * width + i);
* data.Write((j + 1) * width + i + 1);
* data.Write(j * width + i + 1);
*
* data.Write(j * width + i);
* data.Write((j + 1) * width + i);
* data.Write((j + 1) * width + i + 1);
* }
* else
* {
* data.Write(j * width + i);
* data.Write((j + 1) * width + i);
* data.Write(j * width + i + 1);
*
* data.Write(j * width + i + 1);
* data.Write((j + 1) * width + i);
* data.Write((j + 1) * width + i + 1);
* }
*
* / *
* // Not using diamond subdivision
* data.Write(j * width + i);
* data.Write((j + 1) * width + i);
* data.Write(j * width + i + 1);
*
* data.Write(j * width + i + 1);
* data.Write((j + 1) * width + i);
* data.Write((j + 1) * width + i + 1);
* /
* }
* }
* game.groundMesh.UnlockIndexBuffer();
*
* game.groundMesh.ComputeNormals();
* }*/
CollisionShapes.Add(groundShape);
//create ground object
RigidBody ground = LocalCreateRigidBody(0, tr, groundShape);
ground.UserObject = "Ground";
CollisionShape chassisShape = new BoxShape(1.0f, 0.5f, 2.0f);
CollisionShapes.Add(chassisShape);
CompoundShape compound = new CompoundShape();
CollisionShapes.Add(compound);
//localTrans effectively shifts the center of mass with respect to the chassis
Matrix localTrans = Matrix.Translation(Vector3.UnitY);
compound.AddChildShape(localTrans, chassisShape);
RigidBody carChassis = LocalCreateRigidBody(800, Matrix.Identity, compound);
carChassis.UserObject = "Chassis";
//carChassis.SetDamping(0.2f, 0.2f);
//CylinderShapeX wheelShape = new CylinderShapeX(wheelWidth, wheelRadius, wheelRadius);
// clientResetScene();
// create vehicle
VehicleTuning tuning = new VehicleTuning();
IVehicleRaycaster vehicleRayCaster = new DefaultVehicleRaycaster(World);
//vehicle = new RaycastVehicle(tuning, carChassis, vehicleRayCaster);
vehicle = new CustomVehicle(tuning, carChassis, vehicleRayCaster);
carChassis.ActivationState = ActivationState.DisableDeactivation;
World.AddAction(vehicle);
const float connectionHeight = 1.2f;
bool isFrontWheel = true;
// choose coordinate system
vehicle.SetCoordinateSystem(rightIndex, upIndex, forwardIndex);
BulletSharp.Math.Vector3 connectionPointCS0 = new Vector3(CUBE_HALF_EXTENTS - (0.3f * wheelWidth), connectionHeight, 2 * CUBE_HALF_EXTENTS - wheelRadius);
vehicle.AddWheel(connectionPointCS0, wheelDirectionCS0, wheelAxleCS, suspensionRestLength, wheelRadius, tuning, isFrontWheel);
connectionPointCS0 = new Vector3(-CUBE_HALF_EXTENTS + (0.3f * wheelWidth), connectionHeight, 2 * CUBE_HALF_EXTENTS - wheelRadius);
vehicle.AddWheel(connectionPointCS0, wheelDirectionCS0, wheelAxleCS, suspensionRestLength, wheelRadius, tuning, isFrontWheel);
isFrontWheel = false;
connectionPointCS0 = new Vector3(-CUBE_HALF_EXTENTS + (0.3f * wheelWidth), connectionHeight, -2 * CUBE_HALF_EXTENTS + wheelRadius);
vehicle.AddWheel(connectionPointCS0, wheelDirectionCS0, wheelAxleCS, suspensionRestLength, wheelRadius, tuning, isFrontWheel);
connectionPointCS0 = new Vector3(CUBE_HALF_EXTENTS - (0.3f * wheelWidth), connectionHeight, -2 * CUBE_HALF_EXTENTS + wheelRadius);
vehicle.AddWheel(connectionPointCS0, wheelDirectionCS0, wheelAxleCS, suspensionRestLength, wheelRadius, tuning, isFrontWheel);
for (i = 0; i < vehicle.NumWheels; i++)
{
WheelInfo wheel = vehicle.GetWheelInfo(i);
wheel.SuspensionStiffness = suspensionStiffness;
wheel.WheelsDampingRelaxation = suspensionDamping;
wheel.WheelsDampingCompression = suspensionCompression;
wheel.FrictionSlip = wheelFriction;
wheel.RollInfluence = rollInfluence;
}
vehicle.RigidBody.WorldTransform = vehicleTr;
}
protected override void OnInitializePhysics()
{
CollisionShape groundShape = new BoxShape(50, 3, 50);
CollisionShapes.Add(groundShape);
CollisionConf = new DefaultCollisionConfiguration();
Dispatcher = new CollisionDispatcher(CollisionConf);
Solver = new SequentialImpulseConstraintSolver();
Vector3 worldMin = new Vector3(-10000, -10000, -10000);
Vector3 worldMax = new Vector3(10000, 10000, 10000);
Broadphase = new AxisSweep3(worldMin, worldMax);
//Broadphase = new DbvtBroadphase();
World = new DiscreteDynamicsWorld(Dispatcher, Broadphase, Solver, CollisionConf);
int i;
Matrix tr;
Matrix vehicleTr;
//if (UseTrimeshGround)
{
const float scale = 20.0f;
//create a triangle-mesh ground
const int NumVertsX = 20;
const int NumVertsY = 20;
const int totalVerts = NumVertsX * NumVertsY;
const int totalTriangles = 2 * (NumVertsX - 1) * (NumVertsY - 1);
TriangleIndexVertexArray vertexArray = new TriangleIndexVertexArray();
IndexedMesh mesh = new IndexedMesh();
mesh.Allocate(totalTriangles, totalVerts);
mesh.NumTriangles = totalTriangles;
mesh.NumVertices = totalVerts;
mesh.TriangleIndexStride = 3 * sizeof(int);
mesh.VertexStride = Vector3.SizeInBytes;
using (var indicesStream = mesh.GetTriangleStream())
{
var indices = new BinaryWriter(indicesStream);
for (i = 0; i < NumVertsX - 1; i++)
{
for (int j = 0; j < NumVertsY - 1; j++)
{
indices.Write(j * NumVertsX + i);
indices.Write(j * NumVertsX + i + 1);
indices.Write((j + 1) * NumVertsX + i + 1);
indices.Write(j * NumVertsX + i);
indices.Write((j + 1) * NumVertsX + i + 1);
indices.Write((j + 1) * NumVertsX + i);
}
}
indices.Dispose();
}
using (var vertexStream = mesh.GetVertexStream())
{
var vertices = new BinaryWriter(vertexStream);
for (i = 0; i < NumVertsX; i++)
{
for (int j = 0; j < NumVertsY; j++)
{
float wl = .2f;
float height = 20.0f * (float)(Math.Sin(i * wl) * Math.Cos(j * wl));
vertices.Write((i - NumVertsX * 0.5f) * scale);
vertices.Write(height);
vertices.Write((j - NumVertsY * 0.5f) * scale);
}
}
vertices.Dispose();
}
vertexArray.AddIndexedMesh(mesh);
groundShape = new BvhTriangleMeshShape(vertexArray, true);
tr = Matrix.Identity;
vehicleTr = Matrix.Translation(0, -2, 0);
}/*
* else
* {
* // Use HeightfieldTerrainShape
*
* int width = 40, length = 40;
* //int width = 128, length = 128; // Debugging is too slow for this
* float maxHeight = 10.0f;
* float heightScale = maxHeight / 256.0f;
* Vector3 scale = new Vector3(20.0f, maxHeight, 20.0f);
*
* //PhyScalarType scalarType = PhyScalarType.PhyUChar;
* //FileStream file = new FileStream(heightfieldFile, FileMode.Open, FileAccess.Read);
*
* // Use float data
* PhyScalarType scalarType = PhyScalarType.PhyFloat;
* byte[] terr = new byte[width * length * 4];
* MemoryStream file = new MemoryStream(terr);
* BinaryWriter writer = new BinaryWriter(file);
* for (i = 0; i < width; i++)
* for (int j = 0; j < length; j++)
* writer.Write((float)((maxHeight / 2) + 4 * Math.Sin(j * 0.5f) * Math.Cos(i)));
* writer.Flush();
* file.Position = 0;
*
* HeightfieldTerrainShape heightterrainShape = new HeightfieldTerrainShape(width, length,
* file, heightScale, 0, maxHeight, upIndex, scalarType, false);
* heightterrainShape.SetUseDiamondSubdivision(true);
*
* groundShape = heightterrainShape;
* groundShape.LocalScaling = new Vector3(scale.X, 1, scale.Z);
*
* tr = Matrix.Translation(new Vector3(-scale.X / 2, scale.Y / 2, -scale.Z / 2));
* vehicleTr = Matrix.Translation(new Vector3(20, 3, -3));
*
*
* // Create graphics object
*
* file.Position = 0;
* BinaryReader reader = new BinaryReader(file);
*
* int totalTriangles = (width - 1) * (length - 1) * 2;
* int totalVerts = width * length;
*
* game.groundMesh = new Mesh(game.Device, totalTriangles, totalVerts,
* MeshFlags.SystemMemory | MeshFlags.Use32Bit, VertexFormat.Position | VertexFormat.Normal);
* SlimDX.DataStream data = game.groundMesh.LockVertexBuffer(LockFlags.None);
* for (i = 0; i < width; i++)
* {
* for (int j = 0; j < length; j++)
* {
* float height;
* if (scalarType == PhyScalarType.PhyFloat)
* {
* // heightScale isn't applied internally for float data
* height = reader.ReadSingle();
* }
* else if (scalarType == PhyScalarType.PhyUChar)
* {
* height = file.ReadByte() * heightScale;
* }
* else
* {
* height = 0.0f;
* }
*
* data.Write((j - length * 0.5f) * scale.X);
* data.Write(height);
* data.Write((i - width * 0.5f) * scale.Z);
*
* // Normals will be calculated later
* data.Position += 12;
* }
* }
* game.groundMesh.UnlockVertexBuffer();
* file.Close();
*
* data = game.groundMesh.LockIndexBuffer(LockFlags.None);
* for (i = 0; i < width - 1; i++)
* {
* for (int j = 0; j < length - 1; j++)
* {
* // Using diamond subdivision
* if ((j + i) % 2 == 0)
* {
* data.Write(j * width + i);
* data.Write((j + 1) * width + i + 1);
* data.Write(j * width + i + 1);
*
* data.Write(j * width + i);
* data.Write((j + 1) * width + i);
* data.Write((j + 1) * width + i + 1);
* }
* else
* {
* data.Write(j * width + i);
* data.Write((j + 1) * width + i);
* data.Write(j * width + i + 1);
*
* data.Write(j * width + i + 1);
* data.Write((j + 1) * width + i);
* data.Write((j + 1) * width + i + 1);
* }
*
* / *
* // Not using diamond subdivision
* data.Write(j * width + i);
* data.Write((j + 1) * width + i);
* data.Write(j * width + i + 1);
*
* data.Write(j * width + i + 1);
* data.Write((j + 1) * width + i);
* data.Write((j + 1) * width + i + 1);
* /
* }
* }
* game.groundMesh.UnlockIndexBuffer();
*
* game.groundMesh.ComputeNormals();
* }*/
CollisionShapes.Add(groundShape);
RigidBody ground = LocalCreateRigidBody(0, tr, groundShape);
ground.UserObject = "Ground";
CreateVehicle(vehicleTr);
}
