/* 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 <stdio.h> #include <math.h> #include <string.h> #include "chipmunk/chipmunk_private.h" #include "ChipmunkDemo.h" static cpBool NeverCollide(cpArbiter *arb, cpSpace *space, void *data){return cpFalse;} static void update(cpSpace *space) { int steps = 1; cpFloat dt = 1.0f/60.0f/(cpFloat)steps; for(int i=0; i<steps; i++){ cpSpaceStep(space, dt); } } static cpSpace * init(void) { cpSpace *space = cpSpaceNew(); cpSpaceSetIterations(space, 5); cpSpaceSetDamping(space, 0.1f); cpSpaceSetDefaultCollisionHandler(space, NeverCollide, NULL, NULL, NULL, NULL); { cpFloat mass = 1.0f; cpFloat length = 100.0f; cpVect a = cpv(-length/2.0f, 0.0f), b = cpv(length/2.0f, 0.0f); cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForSegment(mass, a, b))); cpBodySetPos(body, cpv(-160.0f, -80.0f)); cpSpaceAddShape(space, cpSegmentShapeNew(body, a, b, 30.0f)); } { cpFloat mass = 1.0f; cpFloat length = 100.0f; cpVect a = cpv(-length/2.0f, 0.0f), b = cpv(length/2.0f, 0.0f); cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForSegment(mass, a, b))); cpBodySetPos(body, cpv(-160.0f, 80.0f)); cpSpaceAddShape(space, cpSegmentShapeNew(body, a, b, 20.0f)); } { cpFloat mass = 1.0f; const int NUM_VERTS = 5; cpVect verts[NUM_VERTS]; for(int i=0; i<NUM_VERTS; i++){ cpFloat angle = -2*M_PI*i/((cpFloat) NUM_VERTS); verts[i] = cpv(40*cos(angle), 40*sin(angle)); } cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, NUM_VERTS, verts, cpvzero))); cpBodySetPos(body, cpv(-0.0f, -80.0f)); cpSpaceAddShape(space, cpPolyShapeNew(body, NUM_VERTS, verts, cpvzero)); } { cpFloat mass = 1.0f; const int NUM_VERTS = 4; cpVect verts[NUM_VERTS]; for(int i=0; i<NUM_VERTS; i++){ cpFloat angle = -2*M_PI*i/((cpFloat) NUM_VERTS); verts[i] = cpv(60*cos(angle), 60*sin(angle)); } cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, NUM_VERTS, verts, cpvzero))); cpBodySetPos(body, cpv(-0.0f, 80.0f)); cpSpaceAddShape(space, cpPolyShapeNew(body, NUM_VERTS, verts, cpvzero)); } { cpFloat mass = 1.0f; cpFloat r = 60.0f; cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, INFINITY)); cpBodySetPos(body, cpv(160.0, -80.0f)); cpSpaceAddShape(space, cpCircleShapeNew(body, r, cpvzero)); } { cpFloat mass = 1.0f; cpFloat r = 40.0f; cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, INFINITY)); cpBodySetPos(body, cpv(160.0, 80.0f)); cpSpaceAddShape(space, cpCircleShapeNew(body, r, cpvzero)); } return space; } static void destroy(cpSpace *space) { ChipmunkDemoFreeSpaceChildren(space); cpSpaceFree(space); } ChipmunkDemo ContactPoints = { "ContactPoints", 1.0/60.0, init, update, ChipmunkDemoDefaultDrawImpl, destroy, };