mirror of https://github.com/axmolengine/axmol.git
103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/* Copyright (c) 2007 Scott Lembcke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "chipmunk/chipmunk.h"
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#include "ChipmunkDemo.h"
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static void update(cpSpace* space, double dt)
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{
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cpSpaceStep(space, dt);
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}
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#define WIDTH 4.0f
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#define HEIGHT 30.0f
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static void add_domino(cpSpace* space, cpVect pos, cpBool flipped)
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{
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cpFloat mass = 1.0f;
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cpFloat radius = 0.5f;
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cpFloat moment = cpMomentForBox(mass, WIDTH, HEIGHT);
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cpBody* body = cpSpaceAddBody(space, cpBodyNew(mass, moment));
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cpBodySetPosition(body, pos);
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cpShape* shape = (flipped ? cpBoxShapeNew(body, HEIGHT, WIDTH, 0.0)
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: cpBoxShapeNew(body, WIDTH - radius * 2.0f, HEIGHT, radius));
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cpSpaceAddShape(space, shape);
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cpShapeSetElasticity(shape, 0.0f);
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cpShapeSetFriction(shape, 0.6f);
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}
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static cpSpace* init(void)
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{
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cpSpace* space = cpSpaceNew();
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cpSpaceSetIterations(space, 30);
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cpSpaceSetGravity(space, cpv(0, -300));
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cpSpaceSetSleepTimeThreshold(space, 0.5f);
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cpSpaceSetCollisionSlop(space, 0.5f);
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// Add a floor.
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cpShape* shape =
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cpSpaceAddShape(space, cpSegmentShapeNew(cpSpaceGetStaticBody(space), cpv(-600, -240), cpv(600, -240), 0.0f));
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cpShapeSetElasticity(shape, 1.0f);
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cpShapeSetFriction(shape, 1.0f);
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cpShapeSetFilter(shape, NOT_GRABBABLE_FILTER);
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// Add the dominoes.
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int n = 12;
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for (int i = 0; i < n; i++)
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{
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for (int j = 0; j < (n - i); j++)
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{
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cpVect offset =
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cpv((j - (n - 1 - i) * 0.5f) * 1.5f * HEIGHT, (i + 0.5f) * (HEIGHT + 2 * WIDTH) - WIDTH - 240);
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add_domino(space, offset, cpFalse);
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add_domino(space, cpvadd(offset, cpv(0, (HEIGHT + WIDTH) / 2.0f)), cpTrue);
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if (j == 0)
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{
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add_domino(space, cpvadd(offset, cpv(0.5f * (WIDTH - HEIGHT), HEIGHT + WIDTH)), cpFalse);
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}
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if (j != n - i - 1)
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{
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add_domino(space, cpvadd(offset, cpv(HEIGHT * 0.75f, (HEIGHT + 3 * WIDTH) / 2.0f)), cpTrue);
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}
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else
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{
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add_domino(space, cpvadd(offset, cpv(0.5f * (HEIGHT - WIDTH), HEIGHT + WIDTH)), cpFalse);
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}
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}
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}
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return space;
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}
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static void destroy(cpSpace* space)
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{
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ChipmunkDemoFreeSpaceChildren(space);
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cpSpaceFree(space);
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}
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ChipmunkDemo PyramidTopple = {
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"Pyramid Topple", 1.0 / 180.0, init, update, ChipmunkDemoDefaultDrawImpl, destroy,
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};
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