OrientedBoundingBox.cpp

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#include <tdme/engine/primitives/OrientedBoundingBox.h>
 
#include <array>
#include <vector>
 
#include <ext/reactphysics3d/src/collision/shapes/BoxShape.h>
 
#include <tdme/tdme.h>
#include <tdme/engine/primitives/BoundingVolume.h>
#include <tdme/math/Math.h>
#include <tdme/math/Vector3.h>
 
using std::array;
using std::vector;
 
using tdme::engine::primitives::BoundingVolume;
using tdme::engine::primitives::OrientedBoundingBox;
using tdme::math::Math;
using tdme::math::Vector3;
 
const array<int32_t, 3> OrientedBoundingBox::FACE0_INDICES = {{ 0, 4, 7 }};
const array<int32_t, 3> OrientedBoundingBox::FACE1_INDICES = {{ 7, 3, 0 }};
const array<int32_t, 3> OrientedBoundingBox::FACE2_INDICES = {{ 6, 5, 1 }};
const array<int32_t, 3> OrientedBoundingBox::FACE3_INDICES = {{ 1, 2, 6 }};
const array<int32_t, 3> OrientedBoundingBox::FACE4_INDICES = {{ 5, 4, 0 }};
const array<int32_t, 3> OrientedBoundingBox::FACE5_INDICES = {{ 0, 1, 5 }};
const array<int32_t, 3> OrientedBoundingBox::FACE6_INDICES = {{ 3, 7, 6 }};
const array<int32_t, 3> OrientedBoundingBox::FACE7_INDICES = {{ 6, 2, 3 }};
const array<int32_t, 3> OrientedBoundingBox::FACE8_INDICES = {{ 2, 1, 0 }};
const array<int32_t, 3> OrientedBoundingBox::FACE9_INDICES = {{ 0, 3, 2 }};
const array<int32_t, 3> OrientedBoundingBox::FACE10_INDICES = {{ 4, 5, 6 }};
const array<int32_t, 3> OrientedBoundingBox::FACE11_INDICES = {{ 6, 7, 4 }};
const array<array<int32_t,3>,12> OrientedBoundingBox::facesVerticesIndexes =
{{
    FACE0_INDICES, FACE1_INDICES, FACE2_INDICES, FACE3_INDICES,
    FACE4_INDICES, FACE5_INDICES, FACE6_INDICES, FACE7_INDICES,
    FACE8_INDICES, FACE9_INDICES, FACE10_INDICES, FACE11_INDICES
}};
 
const Vector3 OrientedBoundingBox::AABB_AXIS_X(1.0f, 0.0f, 0.0f);
const Vector3 OrientedBoundingBox::AABB_AXIS_Y(0.0f, 1.0f, 0.0f);
const Vector3 OrientedBoundingBox::AABB_AXIS_Z(0.0f, 0.0f, 1.0f);
 
OrientedBoundingBox::OrientedBoundingBox(const Vector3& center, const Vector3& axis0, const Vector3& axis1, const Vector3& axis2, const Vector3& halfExtension, const Vector3& scale)
{
    this->center.set(center);
    this->axes[0].set(axis0);
    this->axes[1].set(axis1);
    this->axes[2].set(axis2);
    this->halfExtension.set(halfExtension);
    setScale(scale);
}
 
OrientedBoundingBox::OrientedBoundingBox(BoundingBox* bb, const Vector3& scale)
{
    this->halfExtension.set(bb->getMax()).sub(bb->getMin()).scale(0.5f);
    this->center.set(bb->getMin()).add(halfExtension);
    this->axes[0].set(AABB_AXIS_X);
    this->axes[1].set(AABB_AXIS_Y);
    this->axes[2].set(AABB_AXIS_Z);
    setScale(scale);
}
 
OrientedBoundingBox::OrientedBoundingBox()
{
    this->center.set(0.0f, 0.0f, 0.0f);
    this->axes[0].set(AABB_AXIS_X);
    this->axes[1].set(AABB_AXIS_Y);
    this->axes[2].set(AABB_AXIS_Z);
    this->halfExtension.set(0.0f, 0.0f, 0.0f);
    setScale(Vector3(1.0f, 1.0f, 1.0f));
}
 
const array<Vector3, 8> OrientedBoundingBox::getVertices() const {
    array<Vector3, 8> vertices;
    array<Vector3, 3> xyzAxes;
    xyzAxes[0] = AABB_AXIS_X;
    xyzAxes[1] = AABB_AXIS_Y;
    xyzAxes[2] = AABB_AXIS_Z;
    Vector3 axis;
    // just for my imagination
    //  near left top
    vertices[0].set(0.0f, 0.0f, 0.0f);
    vertices[0].add(axis.set(xyzAxes[0]).scale(-halfExtension[0]).scale(scale[0]));
    vertices[0].add(axis.set(xyzAxes[1]).scale(-halfExtension[1]).scale(scale[1]));
    vertices[0].add(axis.set(xyzAxes[2]).scale(-halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  near right top
    vertices[1].set(0.0f, 0.0f, 0.0f);
    vertices[1].add(axis.set(xyzAxes[0]).scale(+halfExtension[0]).scale(scale[0]));
    vertices[1].add(axis.set(xyzAxes[1]).scale(-halfExtension[1]).scale(scale[1]));
    vertices[1].add(axis.set(xyzAxes[2]).scale(-halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  near right bottom
    vertices[2].set(0.0f, 0.0f, 0.0f);
    vertices[2].add(axis.set(xyzAxes[0]).scale(+halfExtension[0]).scale(scale[0]));
    vertices[2].add(axis.set(xyzAxes[1]).scale(+halfExtension[1]).scale(scale[1]));
    vertices[2].add(axis.set(xyzAxes[2]).scale(-halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  near left bottom
    vertices[3].set(0.0f, 0.0f, 0.0f);
    vertices[3].add(axis.set(xyzAxes[0]).scale(-halfExtension[0]).scale(scale[0]));
    vertices[3].add(axis.set(xyzAxes[1]).scale(+halfExtension[1]).scale(scale[1]));
    vertices[3].add(axis.set(xyzAxes[2]).scale(-halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  far left top
    vertices[4].set(0.0f, 0.0f, 0.0f);
    vertices[4].add(axis.set(xyzAxes[0]).scale(-halfExtension[0]).scale(scale[0]));
    vertices[4].add(axis.set(xyzAxes[1]).scale(-halfExtension[1]).scale(scale[1]));
    vertices[4].add(axis.set(xyzAxes[2]).scale(+halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  far right top
    vertices[5].set(0.0f, 0.0f, 0.0f);
    vertices[5].add(axis.set(xyzAxes[0]).scale(+halfExtension[0]).scale(scale[0]));
    vertices[5].add(axis.set(xyzAxes[1]).scale(-halfExtension[1]).scale(scale[1]));
    vertices[5].add(axis.set(xyzAxes[2]).scale(+halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  far right bottom
    vertices[6].set(0.0f, 0.0f, 0.0f);
    vertices[6].add(axis.set(xyzAxes[0]).scale(+halfExtension[0]).scale(scale[0]));
    vertices[6].add(axis.set(xyzAxes[1]).scale(+halfExtension[1]).scale(scale[1]));
    vertices[6].add(axis.set(xyzAxes[2]).scale(+halfExtension[2]).scale(scale[2]));
    // just for my imagination
    //  far left bottom
    vertices[7].set(0.0f, 0.0f, 0.0f);
    vertices[7].add(axis.set(xyzAxes[0]).scale(-halfExtension[0]).scale(scale[0]));
    vertices[7].add(axis.set(xyzAxes[1]).scale(+halfExtension[1]).scale(scale[1]));
    vertices[7].add(axis.set(xyzAxes[2]).scale(+halfExtension[2]).scale(scale[2]));
    //
    return vertices;
}
 
/**
 * @return faces vertices indexes
 */
const array<array<int32_t,3>,12>& OrientedBoundingBox::getFacesVerticesIndexes() {
    return facesVerticesIndexes;
}
 
const array<Vector3, 3>& OrientedBoundingBox::getAxes() const
{
    return axes;
}
 
const Vector3& OrientedBoundingBox::getHalfExtension() const
{
    return halfExtension;
}
 
void OrientedBoundingBox::setScale(const Vector3& scale) {
    // store new scale
    this->scale.set(scale);
 
    // remove old collision shape
    if (collisionShape != nullptr) delete collisionShape;
 
    //
    collisionShapeLocalTranslation.set(center).scale(scale);
    collisionShapeLocalTransform.setPosition(reactphysics3d::Vector3(collisionShapeLocalTranslation.getX(), collisionShapeLocalTranslation.getY(), collisionShapeLocalTranslation.getZ()));
    collisionShapeLocalTransform.setOrientation(
        reactphysics3d::Quaternion(
            reactphysics3d::Matrix3x3(
                this->axes[0].getX(),
                this->axes[0].getY(),
                this->axes[0].getZ(),
                this->axes[1].getX(),
                this->axes[1].getY(),
                this->axes[1].getZ(),
                this->axes[2].getX(),
                this->axes[2].getY(),
                this->axes[2].getZ()
            )
        )
    );
    collisionShape = new reactphysics3d::BoxShape(
        reactphysics3d::Vector3(
            Math::max(Math::EPSILON, Math::abs(halfExtension.getX() * scale.getX())),
            Math::max(Math::EPSILON, Math::abs(halfExtension.getY() * scale.getY())),
            Math::max(Math::EPSILON, Math::abs(halfExtension.getZ() * scale.getZ()))
        )
    );
    // compute bounding box
    computeBoundingBox();
}
 
BoundingVolume* OrientedBoundingBox::clone() const
{
    return new OrientedBoundingBox(
        center,
        axes[0],
        axes[1],
        axes[2],
        halfExtension,
        scale
    );
}