cpGearJoint.h

/* 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.
 */


const cpConstraintClass *cpGearJointGetClass(void);

typedef struct cpGearJoint {
  cpConstraint constraint;
  cpFloat phase, ratio;
  cpFloat ratio_inv;
  
  cpFloat iSum;
    
  cpFloat bias;
  cpFloat jAcc, jMax;
} cpGearJoint;

cpGearJoint* cpGearJointAlloc(void);
cpGearJoint* cpGearJointInit(cpGearJoint *joint, cpBody *a, cpBody *b, cpFloat phase, cpFloat ratio);
cpConstraint* cpGearJointNew(cpBody *a, cpBody *b, cpFloat phase, cpFloat ratio);

CP_DefineConstraintProperty(cpGearJoint, cpFloat, phase, Phase);
CP_DefineConstraintGetter(cpGearJoint, cpFloat, ratio, Ratio);
void cpGearJointSetRatio(cpConstraint *constraint, cpFloat value);