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/* Copyright (c) 2007 Scott Lembcke
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdlib.h>
#include "chipmunk.h"
#include "ruby.h"
#include "rb_chipmunk.h"
VALUE m_Chipmunk;
ID id_parent;
static VALUE
rb_get_cp_bias_coef(VALUE self)
{
return rb_float_new(cp_bias_coef);
}
static VALUE
rb_set_cp_bias_coef(VALUE self, VALUE num)
{
cp_bias_coef = NUM2DBL(num);
return num;
}
static VALUE
rb_get_cp_collision_slop(VALUE self)
{
return rb_float_new(cp_collision_slop);
}
static VALUE
rb_set_cp_collision_slop(VALUE self, VALUE num)
{
cp_collision_slop = NUM2DBL(num);
return num;
}
static VALUE
rb_momentForCircle(VALUE self, VALUE m, VALUE r1, VALUE r2, VALUE offset)
{
cpFloat i = cpMomentForCircle(NUM2DBL(m), NUM2DBL(r1), NUM2DBL(r2), *VGET(offset));
return rb_float_new(i);
}
static VALUE
rb_momentForPoly(VALUE self, VALUE m, VALUE arr, VALUE offset)
{
Check_Type(arr, T_ARRAY);
int numVerts = RARRAY_LEN(arr);
VALUE *ary_ptr = RARRAY_PTR(arr);
cpVect verts[numVerts];
for(int i=0; i<numVerts; i++)
verts[i] = *VGET(ary_ptr[i]);
cpFloat inertia = cpMomentForPoly(NUM2DBL(m), numVerts, verts, *VGET(offset));
return rb_float_new(inertia);
}
void
Init_chipmunk(void)
{
id_parent = rb_intern("parent");
cpInitChipmunk();
rb_eval_string("Float::INFINITY = 1.0/0.0");
m_Chipmunk = rb_define_module("CP");
rb_define_module_function(m_Chipmunk, "bias_coef", rb_get_cp_bias_coef, 0);
rb_define_module_function(m_Chipmunk, "bias_coef=", rb_set_cp_bias_coef, 1);
rb_define_module_function(m_Chipmunk, "collision_slop", rb_get_cp_collision_slop, 0);
rb_define_module_function(m_Chipmunk, "collision_slop=", rb_set_cp_collision_slop, 1);
rb_define_module_function(m_Chipmunk, "moment_for_circle", rb_momentForCircle, 4);
rb_define_module_function(m_Chipmunk, "moment_for_poly", rb_momentForPoly, 3);
// TODO add seg moment function
Init_cpVect();
Init_cpBB();
Init_cpBody();
Init_cpShape();
Init_cpConstraint();
Init_cpSpace();
}
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