/* 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 "chipmunk.h" #include "ChipmunkDemo.h" static void update(cpSpace *space) { int steps = 3; cpFloat dt = 1.0f/60.0f/(cpFloat)steps; for(int i=0; i<steps; i++) cpSpaceStep(space, dt); } #define WIDTH 4.0f #define HEIGHT 30.0f static void add_domino(cpSpace *space, cpVect pos, cpBool flipped) { cpFloat mass = 1.0f; cpFloat moment = cpMomentForBox(mass, WIDTH, HEIGHT); cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, moment)); cpBodySetPos(body, pos); cpShape *shape = (flipped ? cpBoxShapeNew(body, HEIGHT, WIDTH) : cpBoxShapeNew(body, WIDTH, HEIGHT)); cpSpaceAddShape(space, shape); cpShapeSetElasticity(shape, 0.0f); cpShapeSetFriction(shape, 0.6f); } static cpSpace * init(void) { cpSpace *space = cpSpaceNew(); cpSpaceSetIterations(space, 30); cpSpaceSetGravity(space, cpv(0, -300)); cpSpaceSetSleepTimeThreshold(space, 0.5f); cpSpaceSetCollisionSlop(space, 0.5f); // Add a floor. cpShape *shape = cpSpaceAddShape(space, cpSegmentShapeNew(cpSpaceGetStaticBody(space), cpv(-600,-240), cpv(600,-240), 0.0f)); cpShapeSetElasticity(shape, 1.0f); cpShapeSetFriction(shape, 1.0f); cpShapeSetLayers(shape, NOT_GRABABLE_MASK); // Add the dominoes. int n = 12; for(int i=0; i<n; i++){ for(int j=0; j<(n - i); j++){ cpVect offset = cpv((j - (n - 1 - i)*0.5f)*1.5f*HEIGHT, (i + 0.5f)*(HEIGHT + 2*WIDTH) - WIDTH - 240); add_domino(space, offset, cpFalse); add_domino(space, cpvadd(offset, cpv(0, (HEIGHT + WIDTH)/2.0f)), cpTrue); if(j == 0){ add_domino(space, cpvadd(offset, cpv(0.5f*(WIDTH - HEIGHT), HEIGHT + WIDTH)), cpFalse); } if(j != n - i - 1){ add_domino(space, cpvadd(offset, cpv(HEIGHT*0.75f, (HEIGHT + 3*WIDTH)/2.0f)), cpTrue); } else { add_domino(space, cpvadd(offset, cpv(0.5f*(HEIGHT - WIDTH), HEIGHT + WIDTH)), cpFalse); } } } return space; } static void destroy(cpSpace *space) { ChipmunkDemoFreeSpaceChildren(space); cpSpaceFree(space); } ChipmunkDemo PyramidTopple = { "Pyramid Topple", init, update, ChipmunkDemoDefaultDrawImpl, destroy, };