mirror of
https://github.com/copyrighttxt/watrbx-game-engine.git
synced 2026-09-04 20:57:49 +00:00
52 lines
1.0 KiB
C++
52 lines
1.0 KiB
C++
#include "stdafx.h"
|
|
|
|
#include "V8World/ParallelRampPoly.h"
|
|
#include "V8World/Mesh.h"
|
|
|
|
#include "V8World/GeometryPool.h"
|
|
#include "V8World/ParallelRampMesh.h"
|
|
#include "Util/Math.h"
|
|
|
|
|
|
namespace RBX {
|
|
|
|
void ParallelRampPoly::buildMesh()
|
|
{
|
|
Vector3 key = getSize();
|
|
|
|
aParallelRampMesh = ParallelRampMeshPool::getToken(key);
|
|
|
|
mesh = aParallelRampMesh->getMesh();
|
|
|
|
}
|
|
|
|
Matrix3 ParallelRampPoly::getMoment(float mass) const
|
|
{
|
|
Vector3 size = getSize();
|
|
|
|
float area = 2 * (size.x * size.y + size.y * size.z + size.z * size.x);
|
|
Vector3 I;
|
|
for (int i = 0; i < 3; i++) {
|
|
int j = (i + 1) % 3;
|
|
int k = (i + 2) % 3;
|
|
float x = size[i]; // main axis;
|
|
float y = size[j];
|
|
float z = size[k];
|
|
|
|
float Ix = (mass / (2.0f * area)) * ( (y*y*y*z/3.0f)
|
|
+ (y*z*z*z/3.0f)
|
|
+ (x*y*z*z)
|
|
+ (x*y*y*y/3.0f)
|
|
+ (x*y*y*z)
|
|
+ (x*z*z*z/3.0f) );
|
|
I[i] = Ix;
|
|
}
|
|
return Math::fromDiagonal(I);
|
|
}
|
|
|
|
Vector3 ParallelRampPoly::getCofmOffset( void ) const
|
|
{
|
|
return aParallelRampMesh->GetLocalCofMFromMesh();
|
|
}
|
|
|
|
} // namespace RBX
|