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Merge pull request #8998 from AndrewMeadows/ellipsoids-sorta

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use ConvexHull shape for irregular "spheres"
This commit is contained in:
Brad Hefta-Gaub 2016-11-04 11:39:32 -07:00 committed by GitHub
commit 9a774553ae
2 changed files with 14 additions and 10 deletions
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14
libraries/physics/src/ShapeFactory.cpp
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@ -256,8 +256,18 @@ const btCollisionShape* ShapeFactory::createShapeFromInfo(const ShapeInfo& info)
} }
break; break;
case SHAPE_TYPE_SPHERE: { case SHAPE_TYPE_SPHERE: {
float radius = info.getHalfExtents().x; glm::vec3 halfExtents = info.getHalfExtents();
shape = new btSphereShape(radius); float radius = halfExtents.x;
if (radius == halfExtents.y && radius == halfExtents.z) {
shape = new btSphereShape(radius);
} else {
ShapeInfo::PointList points;
points.reserve(NUM_UNIT_SPHERE_DIRECTIONS);
for (uint32_t i = 0; i < NUM_UNIT_SPHERE_DIRECTIONS; ++i) {
points.push_back(bulletToGLM(_unitSphereDirections[i]) * halfExtents);
}
shape = createConvexHull(points);
}
} }
break; break;
case SHAPE_TYPE_CAPSULE_Y: { case SHAPE_TYPE_CAPSULE_Y: {

10
libraries/shared/src/ShapeInfo.cpp
View file

@ -33,13 +33,8 @@ void ShapeInfo::setParams(ShapeType type, const glm::vec3& halfExtents, QString
_halfExtents = glm::vec3(0.0f); _halfExtents = glm::vec3(0.0f);
break; break;
case SHAPE_TYPE_BOX: case SHAPE_TYPE_BOX:
case SHAPE_TYPE_SPHERE:
break; break;
case SHAPE_TYPE_SPHERE: {
// sphere radius is max of halfExtents
float radius = glm::max(glm::max(halfExtents.x, halfExtents.y), halfExtents.z);
_halfExtents = glm::vec3(radius);
break;
}
case SHAPE_TYPE_COMPOUND: case SHAPE_TYPE_COMPOUND:
case SHAPE_TYPE_STATIC_MESH: case SHAPE_TYPE_STATIC_MESH:
_url = QUrl(url); _url = QUrl(url);
@ -119,8 +114,7 @@ float ShapeInfo::computeVolume() const {
break; break;
} }
case SHAPE_TYPE_SPHERE: { case SHAPE_TYPE_SPHERE: {
float radius = _halfExtents.x; volume = 4.0f * PI * _halfExtents.x * _halfExtents.y * _halfExtents.z / 3.0f;
volume = 4.0f * PI * radius * radius * radius / 3.0f;
break; break;
} }
case SHAPE_TYPE_CYLINDER_Y: { case SHAPE_TYPE_CYLINDER_Y: {