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exposed new Shape functions

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--HG--
branch : box2d-update
This commit is contained in:
Bill Meltsner
2011-09-15 15:31:09 -04:00
parent e5fa4c87c6
commit d8f3db6682
7 changed files with 165 additions and 3 deletions
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src/modules/physics/box2d/Shape.cpp
+73 -2
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@@ -33,8 +33,8 @@ namespace physics
{
namespace box2d
{
Shape::Shape()
: shape(NULL)
Shape::Shape(World * world)
: world(world), shape(NULL)
{
}
@@ -59,6 +59,77 @@ namespace box2d
return SHAPE_INVALID;
}
}
float Shape::getRadius() const
{
return world->scaleUp(shape->m_radius);
}
int Shape::getChildCount() const
{
return shape->GetChildCount();
}
bool Shape::testPoint(float x, float y, float r, float px, float py) const
{
b2Vec2 point(px, py);
b2Transform transform(world->scaleDown(b2Vec2(x, y)), b2Rot(r));
return shape->TestPoint(transform, world->scaleDown(point));
}
int Shape::rayCast(lua_State * L) const
{
float p1x = world->scaleDown((float)luaL_checknumber(L, 1));
float p1y = world->scaleDown((float)luaL_checknumber(L, 2));
float p2x = world->scaleDown((float)luaL_checknumber(L, 3));
float p2y = world->scaleDown((float)luaL_checknumber(L, 4));
float maxFraction = (float)luaL_checknumber(L, 5);
float x = world->scaleDown((float)luaL_checknumber(L, 6));
float y = world->scaleDown((float)luaL_checknumber(L, 7));
float r = (float)luaL_checknumber(L, 8);
int childIndex = (int)luaL_optint(L, 9, 0);
b2RayCastInput input;
input.p1.Set(p1x, p1y);
input.p2.Set(p2x, p2y);
input.maxFraction = maxFraction;
b2Transform transform(b2Vec2(x, y), b2Rot(r));
b2RayCastOutput output;
shape->RayCast(&output, input, transform, childIndex);
lua_pushnumber(L, world->scaleUp(output.normal.x));
lua_pushnumber(L, world->scaleUp(output.normal.y));
lua_pushnumber(L, output.fraction);
return 3;
}
int Shape::computeAABB(lua_State * L) const
{
float x = world->scaleDown((float)luaL_checknumber(L, 1));
float y = world->scaleDown((float)luaL_checknumber(L, 2));
float r = (float)luaL_checknumber(L, 3);
int childIndex = (int)luaL_optint(L, 4, 0);
b2Transform transform(b2Vec2(x, y), b2Rot(r));
b2AABB box;
shape->ComputeAABB(&box, transform, childIndex);
box = world->scaleUp(box);
lua_pushnumber(L, box.lowerBound.x);
lua_pushnumber(L, box.lowerBound.y);
lua_pushnumber(L, box.upperBound.x);
lua_pushnumber(L, box.upperBound.y);
return 4;
}
int Shape::computeMass(lua_State * L) const
{
float density = world->scaleDown((float)luaL_checknumber(L, 1));
b2MassData data;
shape->ComputeMass(&data, density);
b2Vec2 center = world->scaleUp(data.center);
lua_pushnumber(L, center.x);
lua_pushnumber(L, center.y);
lua_pushnumber(L, data.mass);
lua_pushnumber(L, data.I);
return 4;
}
} // box2d
} // physics