void Camera::LookAtDirection(glm::vec3 a_v3Direction)
{
// Makes sure the new direction vector actually points somewhere.
if (a_v3Direction.length() != 0)
{
m_v3Forward = glm::normalize(a_v3Direction);
CalculateDirectionVectors();
CalculateView();
}
}
float Viscosity::CalculateLaplacian(glm::vec3 distance)
{
float len = distance.length();
float lenpow2 = pow(len,2);
float epsilon = ldexp(1.192092896,-7);
if(lenpow2 > KernelSizeSquared)
{
return 0.0f;
}
if(lenpow2 < epsilon)
{
lenpow2 = epsilon;
}
float lenSqrt = sqrt(lenpow2);
return kernelFactor * (6.0f/ kernelSizepow3) * (kernelSize - lenpow2);
}
float Viscosity::Calculate(glm::vec3 distance)
{
float len = distance.length();
float lenpow2 = pow(len,2);
float epsilon = ldexp(1.192092896,-7);
if(lenpow2 > KernelSizeSquared)
{
return 0.0f;
}
if(lenpow2 < epsilon)
{
lenpow2 = epsilon;
}
float lenSqrt = sqrt(lenpow2);
float lenpow3 = pow(lenSqrt,3);
return kernelFactor * (((-lenpow3/(2.0f * kernelSizepow3)) * (lenSqrt/ KernelSizeSquared) + (kernelSize /(2.0f * lenSqrt))) - 1.0f);
}
//--------------------------------------------------------------
void ofxBulletTriMeshShape::create( btDiscreteDynamicsWorld* a_world, ofMesh& aMesh, btTransform &a_bt_tr, float a_mass, glm::vec3 aAAbbMin, glm::vec3 aAAbbMax ) {
if( aMesh.getMode() != OF_PRIMITIVE_TRIANGLES ) {
ofLogWarning() << " ofxBulletTriMeshShape :: create : mesh must be using triangles, not creating!!" << endl;
return;
}
if( aMesh.getNumIndices() < 3 ) {
ofLogWarning() << " ofxBulletTriMeshShape :: create : mesh must have indices, not creating!" << endl;
return;
}
if( !_bInited || _shape == NULL ) {
int vertStride = sizeof(btVector3);
int indexStride = 3*sizeof(int);
totalVerts = (int)aMesh.getNumVertices();
totalIndices = (int)aMesh.getNumIndices();
const int totalTriangles = totalIndices / 3;
if( bullet_indices != NULL ) {
removeShape();
}
if( bullet_vertices != NULL ) {
removeShape();
}
if( bullet_indexVertexArrays != NULL ) {
removeShape();
}
if( _shape != NULL ) {
removeShape();
}
bullet_vertices = new btVector3[ totalVerts ];
bullet_indices = new int[ totalIndices ];
auto& tverts = aMesh.getVertices();
auto& tindices = aMesh.getIndices();
for( int i = 0; i < totalVerts; i++ ) {
bullet_vertices[i].setValue( tverts[i].x, tverts[i].y, tverts[i].z );
}
for( int i = 0; i < totalIndices; i++ ) {
bullet_indices[i] = (int)tindices[i];
}
bullet_indexVertexArrays = new btTriangleIndexVertexArray(totalTriangles, bullet_indices, indexStride,
totalVerts, (btScalar*) &bullet_vertices[0].x(), vertStride);
// if you are having trouble with objects falling through, try passing in smaller or larger aabbMin and aabbMax
// to something closer to the size of your object //
// btVector3 aabbMin(-10000,-10000,-10000),aabbMax(10000,10000,10000);
if( aAAbbMin.length() > 0 && aAAbbMax.length() > 0 ) {
btVector3 aabbMin( aAAbbMin.x, aAAbbMin.y, aAAbbMin.z );
btVector3 aabbMax( aAAbbMax.x, aAAbbMax.y, aAAbbMax.z );
_shape = new btBvhTriangleMeshShape(bullet_indexVertexArrays, true, aabbMin, aabbMax );
} else {
_shape = new btBvhTriangleMeshShape(bullet_indexVertexArrays, true, true );
}
}
ofxBulletRigidBody::create( a_world, _shape, a_bt_tr, a_mass );
createInternalUserData();
updateMesh( a_world, aMesh );
}