static int MakeRandomGuassianPointCloud (NewtonMesh* const mesh, dVector* const points, int count)
{
dVector size(0.0f);
dMatrix matrix(dGetIdentityMatrix());
NewtonMeshCalculateOOBB(mesh, &matrix[0][0], &size.m_x, &size.m_y, &size.m_z);
dVector minBox (matrix.m_posit - matrix[0].Scale (size.m_x) - matrix[1].Scale (size.m_y) - matrix[2].Scale (size.m_z));
dVector maxBox (matrix.m_posit + matrix[0].Scale (size.m_x) + matrix[1].Scale (size.m_y) + matrix[2].Scale (size.m_z));
size = (maxBox - minBox).Scale (0.5f);
dVector origin = (maxBox + minBox).Scale (0.5f);
dFloat biasExp = 10.0f;
dFloat r = dSqrt (size.DotProduct3(size));
r = powf(r, 1.0f/biasExp);
for (int i = 0; i < count; i++) {
dVector& p = points[i];
bool test;
do {
p = dVector (2.0f * RandomVariable(r), 2.0f * RandomVariable(r), 2.0f * RandomVariable(r), 0.0f);
dFloat len = dSqrt (p.DotProduct3(p));
dFloat scale = powf(len, biasExp) / len;
p = p.Scale (scale) + origin;
test = (p.m_x > minBox.m_x) && (p.m_x < maxBox.m_x) && (p.m_y > minBox.m_y) && (p.m_y < maxBox.m_y) && (p.m_z > minBox.m_z) && (p.m_z < maxBox.m_z);
} while (!test);
}
return count;
}
ShatterEffect(NewtonWorld* const world, NewtonMesh* const mesh, int interiorMaterial)
:dList<ShatterAtom>(), m_world (world)
{
// first we populate the bounding Box area with few random point to get some interior subdivisions.
// the subdivision are local to the point placement, by placing these points visual ally with a 3d tool
// and have precise control of how the debris are created.
// the number of pieces is equal to the number of point inside the Mesh plus the number of point on the mesh
dVector size;
dMatrix matrix(GetIdentityMatrix());
NewtonMeshCalculateOOBB(mesh, &matrix[0][0], &size.m_x, &size.m_y, &size.m_z);
// pepper the inside of the BBox box of the mesh with random points
int count = 0;
dVector points[NUMBER_OF_ITERNAL_PARTS + 1];
while (count < NUMBER_OF_ITERNAL_PARTS) {
dFloat x = RandomVariable(size.m_x);
dFloat y = RandomVariable(size.m_y);
dFloat z = RandomVariable(size.m_z);
if ((x <= size.m_x) && (x >= -size.m_x) && (y <= size.m_y) && (y >= -size.m_y) && (z <= size.m_z) && (z >= -size.m_z)){
points[count] = dVector (x, y, z);
count ++;
}
}
// create a texture matrix, for applying the material's UV to all internal faces
dMatrix textureMatrix (GetIdentityMatrix());
textureMatrix[0][0] = 1.0f / size.m_x;
textureMatrix[1][1] = 1.0f / size.m_y;
// now we call create we decompose the mesh into several convex pieces
NewtonMesh* const debriMeshPieces = NewtonMeshVoronoiDecomposition (mesh, count, sizeof (dVector), &points[0].m_x, interiorMaterial, &textureMatrix[0][0]);
// Get the volume of the original mesh
NewtonCollision* const collision = NewtonCreateConvexHullFromMesh (m_world, mesh, 0.0f, 0);
dFloat volume = NewtonConvexCollisionCalculateVolume (collision);
NewtonReleaseCollision(m_world, collision);
// now we iterate over each pieces and for each one we create a visual entity and a rigid body
NewtonMesh* nextDebri;
for (NewtonMesh* debri = NewtonMeshCreateFirstLayer (debriMeshPieces); debri; debri = nextDebri) {
nextDebri = NewtonMeshCreateNextLayer (debriMeshPieces, debri);
NewtonCollision* const collision = NewtonCreateConvexHullFromMesh (m_world, debri, 0.0f, 0);
if (collision) {
ShatterAtom& atom = Append()->GetInfo();
atom.m_mesh = new DemoMesh(debri);
atom.m_collision = collision;
NewtonConvexCollisionCalculateInertialMatrix (atom.m_collision, &atom.m_momentOfInirtia[0], &atom.m_centerOfMass[0]);
dFloat debriVolume = NewtonConvexCollisionCalculateVolume (atom.m_collision);
atom.m_massFraction = debriVolume / volume;
}
NewtonMeshDestroy(debri);
}
NewtonMeshDestroy(debriMeshPieces);
}
void Init (dFloat location_x, dFloat location_z, PrimitiveType shapeType, int materialID, PrimitiveType castingShapeType)
{
m_pith = RandomVariable(3.1416f * 2.0f);
m_yaw = RandomVariable(3.1416f * 2.0f);
m_roll = RandomVariable(3.1416f * 2.0f);
m_step = 15.0f * (dAbs (RandomVariable(0.25f)) + 0.0001f) * 3.1416f/180.0f;
CreatCasterBody(location_x, location_z, shapeType, materialID);
NewtonWorld* const world = ((CustomControllerManager<dClosestDistanceRecord>*)GetManager())->GetWorld();
DemoEntityManager* const scene = (DemoEntityManager*)NewtonWorldGetUserData(world);
dMatrix matrix;
NewtonBodyGetMatrix(m_body, &matrix[0][0]);
matrix.m_posit.m_y += 10.0f;
m_castingVisualEntity = new ClosestDistanceEntity (scene, matrix, materialID, castingShapeType);
}
RandomVariable operator /(double c_arg, RandomVariable & rv_arg)
{
if (!c_arg)
return RandomVariable();
RandomVariable result = rv_arg.algorithm->calculateRatio(c_arg, rv_arg);
RandomVariable::graph.setParent1For(result, new DeltaDistribution(c_arg));
RandomVariable::graph.setParent2For(result, rv_arg);
RandomVariable::graph.setOperationTypeFor(result, RATIO);
return result;
}
RandomVariable RandomVariable::operator *(double c_arg)
{
if (!c_arg)
return RandomVariable();
RandomVariable result = algorithm->calculateProduct(*this, c_arg);
graph.setParent1For(result, *this);
graph.setParent2For(result, new DeltaDistribution(c_arg));
graph.setOperationTypeFor(result, PRODUCT);
return result;
}
static int MakeRandomPoisonPointCloud(NewtonMesh* const mesh, dVector* const points)
{
dVector size(0.0f);
dMatrix matrix(dGetIdentityMatrix());
NewtonMeshCalculateOOBB(mesh, &matrix[0][0], &size.m_x, &size.m_y, &size.m_z);
dVector minBox (matrix.m_posit - matrix[0].Scale (size.m_x) - matrix[1].Scale (size.m_y) - matrix[2].Scale (size.m_z));
dVector maxBox (matrix.m_posit + matrix[0].Scale (size.m_x) + matrix[1].Scale (size.m_y) + matrix[2].Scale (size.m_z));
size = maxBox - minBox;
int xCount = int (size.m_x / POINT_DENSITY_PER_METERS) + 1;
int yCount = int (size.m_y / POINT_DENSITY_PER_METERS) + 1;
int zCount = int (size.m_z / POINT_DENSITY_PER_METERS) + 1;
int count = 0;
dFloat z0 = minBox.m_z;
for (int iz = 0; (iz < zCount) && (count < MAX_POINT_CLOUD_SIZE); iz ++) {
dFloat y0 = minBox.m_y;
for (int iy = 0; (iy < yCount) && (count < MAX_POINT_CLOUD_SIZE); iy ++) {
dFloat x0 = minBox.m_x;
for (int ix = 0; (ix < xCount) && (count < MAX_POINT_CLOUD_SIZE); ix ++) {
dFloat x = x0;
dFloat y = y0;
dFloat z = z0;
x += RandomVariable(POISON_VARIANCE);
y += RandomVariable(POISON_VARIANCE);
z += RandomVariable(POISON_VARIANCE);
points[count] = dVector (x, y, z);
count ++;
x0 += POINT_DENSITY_PER_METERS;
}
y0 += POINT_DENSITY_PER_METERS;
}
z0 += POINT_DENSITY_PER_METERS;
}
return count;
}
void CreateCastingShapes(DemoEntityManager* const scene, dFloat size)
{
NewtonWorld* const world = scene->GetNewton();
int materialID = NewtonMaterialGetDefaultGroupID(world);
dSetRandSeed (0);
dVector shapeSize (size, size, size, 0.0f);
PrimitiveType castSelection[] = {_SPHERE_PRIMITIVE, _CAPSULE_PRIMITIVE, _BOX_PRIMITIVE, _CYLINDER_PRIMITIVE, _REGULAR_CONVEX_HULL_PRIMITIVE, _CHAMFER_CYLINDER_PRIMITIVE};
m_count = sizeof (castSelection) / sizeof (castSelection[0]);
m_castingGeometries = new DemoMesh*[m_count];
m_castingShapeArray = new NewtonCollision*[m_count];
dMatrix alignMatrix (dRollMatrix(3.141592f * 90.0f / 180.0f));
for (int i = 0; i < m_count; i ++) {
dVector shapeSize (size + RandomVariable (size / 2.0f), size + RandomVariable (size / 2.0f), size + RandomVariable (size / 2.0f), 0.0f);
#if 1
m_castingShapeArray[i] = CreateConvexCollision (world, &alignMatrix[0][0], shapeSize, castSelection[i], materialID);
#else
m_castingShapeArray[i] = NewtonCreateCompoundCollision (world, materialID);
NewtonCompoundCollisionBeginAddRemove(m_castingShapeArray[i]);
NewtonCollision* const collision = CreateConvexCollision (world, &alignMatrix[0][0], shapeSize, castSelection[i], materialID);
NewtonCompoundCollisionAddSubCollision (m_castingShapeArray[i], collision);
NewtonDestroyCollision(collision);
NewtonCompoundCollisionEndAddRemove(m_castingShapeArray[i]);
#endif
m_castingGeometries[i] = new DemoMesh("geometry", m_castingShapeArray[i], "smilli.tga", "smilli.tga", "smilli.tga");
}
// make and entity for showing the result of the convex cast
dMatrix matrix (dGetIdentityMatrix());
matrix.m_posit.m_y = 2.0f;
m_currentCastingShape = 0;
m_castingEntity = new DemoEntity (matrix, NULL);
m_castingEntity->SetMesh(m_castingGeometries[m_currentCastingShape], dGetIdentityMatrix());
}
Vector FrostedGlass::Sample(Vector* origin, Vector incident, Vector normal, float wavelength, std::mt19937* prng)
{
/* Generate a random microfacet normal based on the Beckmann distribution with the given roughness. */
float r1 = RandomVariable(prng);
float r2 = RandomVariable(prng);
float theta = atan(-pow(this->roughness, 2.0f) * log(1.0f - r1));
float phi = 2.0f * PI * r2;
Vector m = spherical(phi, theta);
/* Rotate the microfacet normal according to the actual surface normal. */
m = rotate(m, normal);
/* Work out the correct n1 and n2 depending on the incident vector's direction relative to the normal. */
float cosI = incident * normal;
float n1, n2;
if (cosI > 0)
{
/* Incident and normal have the same direction, ray is inside the material. */
n1 = this->refractiveIndex->Lookup(wavelength);
n2 = 1.0f;
/* Flip the microfacet normal around. */
m = ZERO - m;
}
else
{
/* Incident and normal have opposite directions, so the ray is outside the material. */
n2 = this->refractiveIndex->Lookup(wavelength);
n1 = 1.0f;
/* Make the cosine positive. */
cosI = -cosI;
}
/* Calculate the refracted angle's cosine. */
float cosT = 1.0f - pow(n1 / n2, 2.0f) * (1.0f - pow(cosI, 2.0f));
/* Check for total internal reflection. */
if (cosT < 0.0f)
{
/* Total internal reflection occurred. */
(*origin) = (*origin) + m * EPSILON;
return reflect(incident, m);
}
/* Otherwise, finish computing the angle. */
cosT = sqrt(cosT);
/* Now, compute the Fresnel coefficients for reflection and refraction for a randomly polarized ray. */
float R = (pow((n1 * cosI - n2 * cosT) / (n1 * cosI + n2 * cosT), 2.0f) + pow((n2 * cosI - n1 * cosT) / (n1 * cosT + n2 * cosI), 2.0f)) * 0.5f;
/* Perform a random trial to decide whether to reflect or refract the ray. */
if (RandomVariable(prng) < R)
{
/* Reflection. */
(*origin) = (*origin) + m * EPSILON;
return reflect(incident, m);
}
else
{
/* Refraction. */
(*origin) = (*origin) - m * EPSILON;
return incident * (n1 / n2) + m * ((n1 / n2) * cosI - cosT);
}
}
NewtonCollision* CreateConvexCollision (NewtonWorld* world, const dMatrix& srcMatrix, const dVector& originalSize, PrimitiveType type, int materialID__)
{
dVector size (originalSize);
NewtonCollision* collision = NULL;
switch (type)
{
case _NULL_PRIMITIVE:
{
collision = NewtonCreateNull (world);
break;
}
case _SPHERE_PRIMITIVE:
{
// create the collision
collision = NewtonCreateSphere (world, size.m_x * 0.5f, 0, NULL);
break;
}
case _BOX_PRIMITIVE:
{
// create the collision
collision = NewtonCreateBox (world, size.m_x, size.m_y, size.m_z, 0, NULL);
break;
}
case _CONE_PRIMITIVE:
{
dFloat r = size.m_x * 0.5f;
dFloat h = size.m_y;
// create the collision
collision = NewtonCreateCone (world, r, h, 0, NULL);
break;
}
case _CYLINDER_PRIMITIVE:
{
// create the collision
collision = NewtonCreateCylinder (world, size.m_x * 0.5f, size.m_y, 0, NULL);
break;
}
case _CAPSULE_PRIMITIVE:
{
// create the collision
collision = NewtonCreateCapsule (world, size.m_x * 0.5f, size.m_y, 0, NULL);
break;
}
case _TAPERED_CAPSULE_PRIMITIVE:
{
// create the collision
collision = NewtonCreateTaperedCapsule (world, size.m_x * 0.5f, size.m_z * 0.5f, size.m_y, 0, NULL);
break;
}
case _CHAMFER_CYLINDER_PRIMITIVE:
{
// create the collision
collision = NewtonCreateChamferCylinder (world, size.m_x * 0.5f, size.m_y, 0, NULL);
break;
}
case _TAPERED_CYLINDER_PRIMITIVE:
{
// create the collision
collision = NewtonCreateTaperedCylinder (world, size.m_x * 0.5f, size.m_z * 0.5f, size.m_y, 0, NULL);
break;
}
case _RANDOM_CONVEX_HULL_PRIMITIVE:
{
// Create a clouds of random point around the origin
#define SAMPLE_COUNT 200
dVector cloud [SAMPLE_COUNT];
// make sure that at least the top and bottom are present
cloud [0] = dVector ( size.m_x * 0.5f, 0.0f, 0.0f, 0.0f);
cloud [1] = dVector (-size.m_x * 0.5f, 0.0f, 0.0f, 0.0f);
cloud [2] = dVector ( 0.0f, size.m_y * 0.5f, 0.0f, 0.0f);
cloud [3] = dVector ( 0.0f, -size.m_y * 0.5f, 0.0f, 0.0f);
cloud [4] = dVector (0.0f, 0.0f, size.m_z * 0.5f, 0.0f);
cloud [5] = dVector (0.0f, 0.0f, -size.m_z * 0.5f, 0.0f);
int count = 6;
// populate the cloud with pseudo Gaussian random points
for (int i = 6; i < SAMPLE_COUNT; i ++) {
cloud [i].m_x = RandomVariable(size.m_x);
cloud [i].m_y = RandomVariable(size.m_y);
cloud [i].m_z = RandomVariable(size.m_z);
count ++;
}
collision = NewtonCreateConvexHull (world, count, &cloud[0].m_x, sizeof (dVector), 0.01f, 0, NULL);
break;
}
case _REGULAR_CONVEX_HULL_PRIMITIVE:
{
// Create a clouds of random point around the origin
#define STEPS_HULL 6
//#define STEPS_HULL 3
dVector cloud [STEPS_HULL * 4 + 256];
int count = 0;
dFloat radius = size.m_y;
dFloat height = size.m_x * 0.999f;
dFloat x = - height * 0.5f;
dMatrix rotation (dPitchMatrix(2.0f * 3.141592f / STEPS_HULL));
for (int i = 0; i < 4; i ++) {
dFloat pad = ((i == 1) || (i == 2)) * 0.25f * radius;
dVector p (x, 0.0f, radius + pad);
x += 0.3333f * height;
dMatrix acc (dGetIdentityMatrix());
for (int j = 0; j < STEPS_HULL; j ++) {
cloud[count] = acc.RotateVector(p);
acc = acc * rotation;
count ++;
}
}
collision = NewtonCreateConvexHull (world, count, &cloud[0].m_x, sizeof (dVector), 0.02f, 0, NULL);
break;
}
case _COMPOUND_CONVEX_CRUZ_PRIMITIVE:
{
//dMatrix matrix (GetIdentityMatrix());
dMatrix matrix (dPitchMatrix(15.0f * 3.1416f / 180.0f) * dYawMatrix(15.0f * 3.1416f / 180.0f) * dRollMatrix(15.0f * 3.1416f / 180.0f));
// NewtonCollision* const collisionA = NewtonCreateBox (world, size.m_x, size.m_x * 0.25f, size.m_x * 0.25f, 0, &matrix[0][0]);
// NewtonCollision* const collisionB = NewtonCreateBox (world, size.m_x * 0.25f, size.m_x, size.m_x * 0.25f, 0, &matrix[0][0]);
// NewtonCollision* const collisionC = NewtonCreateBox (world, size.m_x * 0.25f, size.m_x * 0.25f, size.m_x, 0, &matrix[0][0]);
matrix.m_posit = dVector (size.m_x * 0.5f, 0.0f, 0.0f, 1.0f);
NewtonCollision* const collisionA = NewtonCreateBox (world, size.m_x, size.m_x * 0.25f, size.m_x * 0.25f, 0, &matrix[0][0]);
matrix.m_posit = dVector (0.0f, size.m_x * 0.5f, 0.0f, 1.0f);
NewtonCollision* const collisionB = NewtonCreateBox (world, size.m_x * 0.25f, size.m_x, size.m_x * 0.25f, 0, &matrix[0][0]);
matrix.m_posit = dVector (0.0f, 0.0f, size.m_x * 0.5f, 1.0f);
NewtonCollision* const collisionC = NewtonCreateBox (world, size.m_x * 0.25f, size.m_x * 0.25f, size.m_x, 0, &matrix[0][0]);
collision = NewtonCreateCompoundCollision (world, 0);
NewtonCompoundCollisionBeginAddRemove(collision);
NewtonCompoundCollisionAddSubCollision (collision, collisionA);
NewtonCompoundCollisionAddSubCollision (collision, collisionB);
NewtonCompoundCollisionAddSubCollision (collision, collisionC);
NewtonCompoundCollisionEndAddRemove(collision);
NewtonDestroyCollision(collisionA);
NewtonDestroyCollision(collisionB);
NewtonDestroyCollision(collisionC);
break;
}
default: dAssert (0);
}
dMatrix matrix (srcMatrix);
matrix.m_front = matrix.m_front.Scale (1.0f / dSqrt (matrix.m_front % matrix.m_front));
matrix.m_right = matrix.m_front * matrix.m_up;
matrix.m_right = matrix.m_right.Scale (1.0f / dSqrt (matrix.m_right % matrix.m_right));
matrix.m_up = matrix.m_right * matrix.m_front;
NewtonCollisionSetMatrix(collision, &matrix[0][0]);
return collision;
}
static void CreateSimpleVoronoiShatter (DemoEntityManager* const scene)
{
// create a collision primitive
// dVector size (2.0f, 2.0f, 2.0f);
// dVector size = dVector (10.0f, 0.5f, 10.0f, 0.0f);
dVector size = dVector (5.0f, 5.0f, 5.0f, 0.0f);
NewtonWorld* const world = scene->GetNewton();
// NewtonCollision* const collision = CreateConvexCollision (world, GetIdentityMatrix(), size, _BOX_PRIMITIVE, 0);
NewtonCollision* const collision = CreateConvexCollision (world, GetIdentityMatrix(), size, _CAPSULE_PRIMITIVE, 0);
// NewtonCollision* const collision = CreateConvexCollision (world, GetIdentityMatrix(), size, _SPHERE_PRIMITIVE, 0);
// NewtonCollision* const collision = CreateConvexCollision (world, GetIdentityMatrix(), size, _REGULAR_CONVEX_HULL_PRIMITIVE, 0);
// NewtonCollision* const collision = CreateConvexCollision (world, GetIdentityMatrix(), size, _RANDOM_CONVEX_HULL_PRIMITIVE, 0);
// create a newton mesh from the collision primitive
NewtonMesh* const mesh = NewtonMeshCreateFromCollision(collision);
// apply a simple Box Mapping
int tex0 = LoadTexture("reljef.tga");
NewtonMeshApplyBoxMapping(mesh, tex0, tex0, tex0);
// pepper the bing box of the mesh with random points
dVector points[NUMBER_OF_ITERNAL_PARTS + 100];
int count = 0;
while (count < NUMBER_OF_ITERNAL_PARTS) {
dFloat x = RandomVariable(size.m_x);
dFloat y = RandomVariable(size.m_y);
dFloat z = RandomVariable(size.m_z);
if ((x <= size.m_x) && (x >= -size.m_x) && (y <= size.m_y) && (y >= -size.m_y) && (z <= size.m_z) && (z >= -size.m_z)){
points[count] = dVector (x, y, z);
count ++;
}
}
count = 4;
// Create the array of convex pieces from the mesh
int interior = LoadTexture("KAMEN-stup.tga");
// int interior = LoadTexture("camo.tga");
dMatrix textureMatrix (GetIdentityMatrix());
textureMatrix[0][0] = 1.0f / size.m_x;
textureMatrix[1][1] = 1.0f / size.m_y;
NewtonMesh* const convexParts = NewtonMeshVoronoiDecomposition (mesh, count, sizeof (dVector), &points[0].m_x, interior, &textureMatrix[0][0]);
// NewtonMesh* const convexParts = NewtonMeshConvexDecomposition (mesh, 1000000);
#if 1
dScene xxxx(world);
dScene::dTreeNode* const modelNode = xxxx.CreateSceneNode(xxxx.GetRootNode());
dScene::dTreeNode* const meshNode = xxxx.CreateMeshNode(modelNode);
dMeshNodeInfo* const modelMesh = (dMeshNodeInfo*)xxxx.GetInfoFromNode(meshNode);
modelMesh->ReplaceMesh (convexParts);
xxxx.Serialize("../../../media/xxx.ngd");
#endif
DemoEntity* const entity = new DemoEntity(NULL);
entity->SetMatrix(*scene, dQuaternion(), dVector (0, 10, 0, 0));
entity->InterpolateMatrix (*scene, 1.0f);
scene->Append (entity);
DemoMesh* const mesh1 = new DemoMesh(convexParts);
entity->SetMesh(mesh1);
mesh1->Release();
/*
DemoEntity* const entity2 = new DemoEntity(NULL);
entity2->SetMatrix(*scene, dQuaternion(), dVector (0, 10, 0, 0));
entity2->InterpolateMatrix (*scene, 1.0f);
scene->Append (entity2);
DemoMesh* const mesh2 = new DemoMesh(mesh);
entity2->SetMesh(mesh2);
mesh2->Release();
*/
// make sure the assets are released before leaving the function
if (convexParts) {
NewtonMeshDestroy (convexParts);
}
NewtonMeshDestroy (mesh);
NewtonReleaseCollision(world, collision);
}
static void DestroyThisBodyCallback (const NewtonBody* body, const NewtonJoint* contactJoint)
{
NewtonWorld* world;
NewtonMesh* topMesh;
NewtonMesh* bottomMesh;
NewtonMesh* effectMesh;
RenderPrimitive* srcPrimitive;
dMatrix matrix;
dFloat maxForce;
dVector point;
dVector dir0;
dVector dir1;
// Get the world;
world = NewtonBodyGetWorld (body);
// find a the strongest force
maxForce = 0.0f;
for (void* contact = NewtonContactJointGetFirstContact (contactJoint); contact; contact = NewtonContactJointGetNextContact (contactJoint, contact)) {
dVector force;
NewtonMaterial* material;
material = NewtonContactGetMaterial (contact);
NewtonMaterialGetContactForce (material, &force.m_x);
if (force.m_x > maxForce) {
dVector normal;
NewtonMaterialGetContactPositionAndNormal(material, &point[0], &normal[0]);
NewtonMaterialGetContactTangentDirections (material, &dir0[0], &dir0[0]);
}
}
// get the visual primitive
srcPrimitive = (RenderPrimitive*) NewtonBodyGetUserData (body);
// get the effect mesh that is use to create the debris pieces
effectMesh = srcPrimitive->m_specialEffect;
// calculate the cut plane plane
NewtonBodyGetMatrix (body, &matrix[0][0]);
dMatrix clipMatrix (dgGrammSchmidt(dir0) *
dYawMatrix(30.0f * 3.1416f/180.0f * RandomVariable(1.0f)) *
dRollMatrix(30.0f * 3.1416f/180.0f * RandomVariable(1.0f)));
clipMatrix.m_posit = point;
clipMatrix.m_posit.m_w = 1.0f;
clipMatrix = clipMatrix * matrix.Inverse();
// break the mesh into two pieces
NewtonMeshClip (effectMesh, meshClipper, &clipMatrix[0][0], &topMesh, &bottomMesh);
if (topMesh && bottomMesh) {
dFloat volume;
NewtonMesh* meshPartA = NULL;
NewtonMesh* meshPartB = NULL;
volume = NewtonConvexCollisionCalculateVolume (NewtonBodyGetCollision(body));
// the clipper was able to make a cut now we can create new debris piece for replacement
dMatrix clipMatrix1 (dgGrammSchmidt(dir1) *
dYawMatrix(30.0f * 3.1416f/180.0f * RandomVariable(1.0f)) *
dRollMatrix(30.0f * 3.1416f/180.0f * RandomVariable(1.0f)));
NewtonMeshClip (bottomMesh, meshClipper, &clipMatrix1[0][0], &meshPartA, &meshPartB);
if (meshPartA && meshPartB) {
// creat another split (you can make as many depend of the FPS)
CreateDebriPiece (body, meshPartA, volume);
CreateDebriPiece (body, meshPartB, volume);
NewtonMeshDestroy(meshPartA);
NewtonMeshDestroy(meshPartB);
} else {
CreateDebriPiece (body, bottomMesh, volume);
}
NewtonMeshDestroy(bottomMesh);
dMatrix clipMatrix2 (dgGrammSchmidt(dir1) *
dYawMatrix(30.0f * 3.1416f/180.0f * RandomVariable(1.0f)) *
dRollMatrix(30.0f * 3.1416f/180.0f * RandomVariable(1.0f)));
NewtonMeshClip (topMesh, meshClipper, &clipMatrix2[0][0], &meshPartA, &meshPartB);
if (meshPartA && meshPartB) {
// creat another split (you can make as many depend of the FPS)
CreateDebriPiece (body, meshPartA, volume);
CreateDebriPiece (body, meshPartB, volume);
NewtonMeshDestroy(meshPartA);
NewtonMeshDestroy(meshPartB);
} else {
CreateDebriPiece (body, topMesh, volume);
}
NewtonMeshDestroy(topMesh);
// remove the old visual from graphics world
SceneManager* system = (SceneManager*) NewtonWorldGetUserData(world);
delete srcPrimitive;
system->Remove(srcPrimitive);
// finally destroy this body;
NewtonDestroyBody(world, body);
}
}
StupidComplexOfConvexShapes (DemoEntityManager* const scene, int count)
:DemoEntity (dGetIdentityMatrix(), NULL)
,m_rayP0(0.0f, 0.0f, 0.0f, 0.0f)
,m_rayP1(0.0f, 0.0f, 0.0f, 0.0f)
{
scene->Append(this);
count = 40;
//count = 1;
const dFloat size = 0.5f;
DemoMesh* gemetries[32];
NewtonCollision* collisionArray[32];
NewtonWorld* const world = scene->GetNewton();
int materialID = NewtonMaterialGetDefaultGroupID(world);
// create a pool of predefined convex mesh
// PrimitiveType selection[] = {_SPHERE_PRIMITIVE, _BOX_PRIMITIVE, _CAPSULE_PRIMITIVE, _CYLINDER_PRIMITIVE, _CONE_PRIMITIVE, _TAPERED_CAPSULE_PRIMITIVE, _TAPERED_CYLINDER_PRIMITIVE, _CHAMFER_CYLINDER_PRIMITIVE, _RANDOM_CONVEX_HULL_PRIMITIVE, _REGULAR_CONVEX_HULL_PRIMITIVE};
PrimitiveType selection[] = {_SPHERE_PRIMITIVE};
for (int i = 0; i < int (sizeof (collisionArray) / sizeof (collisionArray[0])); i ++) {
int index = dRand() % (sizeof (selection) / sizeof (selection[0]));
dVector shapeSize (size + RandomVariable (size / 2.0f), size + RandomVariable (size / 2.0f), size + RandomVariable (size / 2.0f), 0.0f);
shapeSize = dVector(size, size, size, 0.0f);
collisionArray[i] = CreateConvexCollision (world, dGetIdentityMatrix(), shapeSize, selection[index], materialID);
gemetries[i] = new DemoMesh("geometry", collisionArray[i], "wood_4.tga", "wood_4.tga", "wood_1.tga");
}
// make a large complex of plane by adding lost of these shapes at a random location and oriention;
NewtonCollision* const compound = NewtonCreateCompoundCollision (world, materialID);
NewtonCompoundCollisionBeginAddRemove(compound);
for (int i = 0 ; i < count; i ++) {
for (int j = 0 ; j < count; j ++) {
float pitch = RandomVariable (1.0f) * 2.0f * 3.1416f;
float yaw = RandomVariable (1.0f) * 2.0f * 3.1416f;
float roll = RandomVariable (1.0f) * 2.0f * 3.1416f;
float x = size * (j - count / 2) + RandomVariable (size * 0.5f);
float y = RandomVariable (size * 2.0f);
float z = size * (i - count / 2) + RandomVariable (size * 0.5f);
dMatrix matrix (dPitchMatrix (pitch) * dYawMatrix (yaw) * dRollMatrix (roll));
matrix.m_posit = dVector (x, y, z, 1.0f);
int index = dRand() % (sizeof (selection) / sizeof (selection[0]));
DemoEntity* const entity = new DemoEntity(matrix, this);
entity->SetMesh(gemetries[index], dGetIdentityMatrix());
NewtonCollisionSetMatrix (collisionArray[index], &matrix[0][0]);
NewtonCompoundCollisionAddSubCollision (compound, collisionArray[index]);
}
}
NewtonCompoundCollisionEndAddRemove(compound);
CreateSimpleBody (world, NULL, 0.0f, dGetIdentityMatrix(), compound, 0);
// destroy all collision shapes after they are used
NewtonDestroyCollision(compound);
for (int i = 0; i < int (sizeof (collisionArray) / sizeof (collisionArray[0])); i ++) {
gemetries[i]->Release();
NewtonDestroyCollision(collisionArray[i]);
}
// now make and array of collision shapes for convex casting by mouse point click an drag
CreateCastingShapes(scene, size * 2.0f);
}
static void MakeFunnyCompound (DemoEntityManager* const scene, const dVector& origin)
{
NewtonWorld* const world = scene->GetNewton();
// create an empty compound collision
NewtonCollision* const compound = NewtonCreateCompoundCollision (world, 0);
#if 1
NewtonCompoundCollisionBeginAddRemove(compound);
// add a bunch of convex collision at random position and orientation over the surface of a big sphere
float radio = 5.0f;
for (int i = 0 ; i < 300; i ++) {
NewtonCollision* collision = NULL;
float pitch = RandomVariable (1.0f) * 2.0f * 3.1416f;
float yaw = RandomVariable (1.0f) * 2.0f * 3.1416f;
float roll = RandomVariable (1.0f) * 2.0f * 3.1416f;
float x = RandomVariable (0.5f);
float y = RandomVariable (0.5f);
float z = RandomVariable (0.5f);
if ((x == 0.0f) && (y == 0.0f) && (z == 0.0f)){
x = 0.1f;
}
dVector p (x, y, z, 1.0f) ;
p = p.Scale (radio / dSqrt (p % p));
dMatrix matrix (dPitchMatrix (pitch) * dYawMatrix (yaw) * dRollMatrix (roll));
matrix.m_posit = p;
int r = dRand();
switch ((r >>2) & 3)
{
case 0:
{
collision = NewtonCreateSphere(world, 0.5, 0, &matrix[0][0]) ;
break;
}
case 1:
{
collision = NewtonCreateCapsule(world, 0.3f, 0.2f, 0.5f, 0, &matrix[0][0]) ;
break;
}
case 2:
{
collision = NewtonCreateCylinder(world, 0.25, 0.5, 0.25, 0, &matrix[0][0]) ;
break;
}
case 3:
{
collision = NewtonCreateCone(world, 0.25, 0.25, 0, &matrix[0][0]) ;
break;
}
}
dAssert (collision);
// we can set a collision id, and use data per sub collision
NewtonCollisionSetUserID(collision, i);
NewtonCollisionSetUserData(collision, (void*) i);
// add this new collision
NewtonCompoundCollisionAddSubCollision (compound, collision);
NewtonDestroyCollision(collision);
}
// finish adding shapes
NewtonCompoundCollisionEndAddRemove(compound);
{
// remove the first 10 shapes
// test remove shape form a compound
NewtonCompoundCollisionBeginAddRemove(compound);
void* node = NewtonCompoundCollisionGetFirstNode(compound);
for (int i = 0; i < 10; i ++) {
//NewtonCollision* const collision = NewtonCompoundCollisionGetCollisionFromNode(compound, node);
void* const nextNode = NewtonCompoundCollisionGetNextNode(compound, node);
NewtonCompoundCollisionRemoveSubCollision(compound, node);
node = nextNode;
}
// finish remove
void* handle1 = NewtonCompoundCollisionGetNodeByIndex (compound, 30);
void* handle2 = NewtonCompoundCollisionGetNodeByIndex (compound, 100);
NewtonCollision* const shape1 = NewtonCompoundCollisionGetCollisionFromNode (compound, handle1);
NewtonCollision* const shape2 = NewtonCompoundCollisionGetCollisionFromNode (compound, handle2);
NewtonCollision* const copyShape1 = NewtonCollisionCreateInstance (shape1);
NewtonCollision* const copyShape2 = NewtonCollisionCreateInstance (shape2);
// you can also remove shape by their index
NewtonCompoundCollisionRemoveSubCollisionByIndex (compound, 30);
NewtonCompoundCollisionRemoveSubCollisionByIndex (compound, 100);
handle1 = NewtonCompoundCollisionAddSubCollision (compound, copyShape1);
handle2 = NewtonCompoundCollisionAddSubCollision (compound, copyShape2);
NewtonDestroyCollision(copyShape1);
NewtonDestroyCollision(copyShape2);
NewtonCompoundCollisionEndAddRemove(compound);
}
{
// show how to modify the children of a compound collision
NewtonCompoundCollisionBeginAddRemove(compound);
for (void* node = NewtonCompoundCollisionGetFirstNode(compound); node; node = NewtonCompoundCollisionGetNextNode(compound, node)) {
NewtonCollision* const collision = NewtonCompoundCollisionGetCollisionFromNode(compound, node);
// you can scale, change the matrix, change the inertia, do anything you want with the change
NewtonCollisionSetUserData(collision, NULL);
}
NewtonCompoundCollisionEndAddRemove(compound);
}
// NewtonCollisionSetScale(compound, 0.5f, 0.25f, 0.125f);
#else
//test Yeside compound shape shape
// - Rotation="1.5708 -0 0" Translation="0 0 0.024399" Size="0.021 0.096" Pos="0 0 0.115947"
// - Rotation="1.5708 -0 0" Translation="0 0 0.056366" Size="0.195 0.024" Pos="0 0 0.147914"
// - Rotation="1.5708 -0 0" Translation="0 0 -0.056366" Size="0.0065 0.07 Pos="0 0 0.035182"
NewtonCompoundCollisionBeginAddRemove(compound);
NewtonCollision* collision;
dMatrix offsetMatrix (dPitchMatrix(1.5708f));
offsetMatrix.m_posit.m_z = 0.115947f;
collision = NewtonCreateCylinder (world, 0.021f, 0.096f, 0, &offsetMatrix[0][0]) ;
NewtonCompoundCollisionAddSubCollision (compound, collision);
NewtonDestroyCollision(collision);
offsetMatrix.m_posit.m_z = 0.035182f;
collision = NewtonCreateCylinder (world, 0.0065f, 0.07f, 0, &offsetMatrix[0][0]) ;
NewtonCompoundCollisionAddSubCollision (compound, collision);
NewtonDestroyCollision(collision);
offsetMatrix.m_posit.m_z = 0.147914f;
collision = NewtonCreateCylinder (world, 0.195f, 0.024f, 0, &offsetMatrix[0][0]) ;
NewtonCompoundCollisionAddSubCollision (compound, collision);
NewtonDestroyCollision(collision);
NewtonCompoundCollisionEndAddRemove(compound);
#endif
// for now we will simple make simple Box, make a visual Mesh
DemoMesh* const visualMesh = new DemoMesh ("big ball", compound, "metal_30.tga", "metal_30.tga", "metal_30.tga");
int instaceCount = 2;
dMatrix matrix (dGetIdentityMatrix());
matrix.m_posit = origin;
for (int ix = 0; ix < instaceCount; ix ++) {
for (int iz = 0; iz < instaceCount; iz ++) {
dFloat y = origin.m_y;
dFloat x = origin.m_x + (ix - instaceCount/2) * 15.0f;
dFloat z = origin.m_z + (iz - instaceCount/2) * 15.0f;
matrix.m_posit = FindFloor (world, dVector (x, y + 10.0f, z, 0.0f), 20.0f); ;
matrix.m_posit.m_y += 15.0f;
CreateSimpleSolid (scene, visualMesh, 10.0f, matrix, compound, 0);
}
}
visualMesh->Release();
NewtonDestroyCollision(compound);
}