mirror of https://github.com/axmolengine/axmol.git
153 lines
8.3 KiB
C++
153 lines
8.3 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 <string.h>
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#include "chipmunk/chipmunk.h"
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#include "ChipmunkDemo.h"
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static cpFloat springForce(cpConstraint* spring, cpFloat dist)
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{
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cpFloat clamp = 20.0f;
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return cpfclamp(cpDampedSpringGetRestLength(spring) - dist, -clamp, clamp) * cpDampedSpringGetStiffness(spring);
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}
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static cpConstraint*
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new_spring(cpBody* a, cpBody* b, cpVect anchorA, cpVect anchorB, cpFloat restLength, cpFloat stiff, cpFloat damp)
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{
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cpConstraint* spring = cpDampedSpringNew(a, b, anchorA, anchorB, restLength, stiff, damp);
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cpDampedSpringSetSpringForceFunc(spring, springForce);
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return spring;
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}
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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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static cpBody* add_bar(cpSpace* space, cpVect a, cpVect b, int group)
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{
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cpVect center = cpvmult(cpvadd(a, b), 1.0f / 2.0f);
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cpFloat length = cpvlength(cpvsub(b, a));
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cpFloat mass = length / 160.0f;
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cpBody* body = cpSpaceAddBody(space, cpBodyNew(mass, mass * length * length / 12.0f));
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cpBodySetPosition(body, center);
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cpShape* shape = cpSpaceAddShape(space, cpSegmentShapeNew(body, cpvsub(a, center), cpvsub(b, center), 10.0f));
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cpShapeSetFilter(shape, cpShapeFilterNew(group, CP_ALL_CATEGORIES, CP_ALL_CATEGORIES));
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return body;
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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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cpBody* staticBody = cpSpaceGetStaticBody(space);
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cpBody* body1 = add_bar(space, cpv(-240, 160), cpv(-160, 80), 1);
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cpBody* body2 = add_bar(space, cpv(-160, 80), cpv(-80, 160), 1);
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cpBody* body3 = add_bar(space, cpv(0, 160), cpv(80, 0), 0);
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cpBody* body4 = add_bar(space, cpv(160, 160), cpv(240, 160), 0);
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cpBody* body5 = add_bar(space, cpv(-240, 0), cpv(-160, -80), 2);
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cpBody* body6 = add_bar(space, cpv(-160, -80), cpv(-80, 0), 2);
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cpBody* body7 = add_bar(space, cpv(-80, 0), cpv(0, 0), 2);
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cpBody* body8 = add_bar(space, cpv(0, -80), cpv(80, -80), 0);
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cpBody* body9 = add_bar(space, cpv(240, 80), cpv(160, 0), 3);
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cpBody* body10 = add_bar(space, cpv(160, 0), cpv(240, -80), 3);
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cpBody* body11 = add_bar(space, cpv(-240, -80), cpv(-160, -160), 4);
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cpBody* body12 = add_bar(space, cpv(-160, -160), cpv(-80, -160), 4);
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cpBody* body13 = add_bar(space, cpv(0, -160), cpv(80, -160), 0);
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cpBody* body14 = add_bar(space, cpv(160, -160), cpv(240, -160), 0);
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cpSpaceAddConstraint(space, cpPivotJointNew2(body1, body2, cpv(40, -40), cpv(-40, -40)));
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cpSpaceAddConstraint(space, cpPivotJointNew2(body5, body6, cpv(40, -40), cpv(-40, -40)));
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cpSpaceAddConstraint(space, cpPivotJointNew2(body6, body7, cpv(40, 40), cpv(-40, 0)));
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cpSpaceAddConstraint(space, cpPivotJointNew2(body9, body10, cpv(-40, -40), cpv(-40, 40)));
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cpSpaceAddConstraint(space, cpPivotJointNew2(body11, body12, cpv(40, -40), cpv(-40, 0)));
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cpFloat stiff = 100.0f;
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cpFloat damp = 0.5f;
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cpSpaceAddConstraint(space, new_spring(staticBody, body1, cpv(-320, 240), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body1, cpv(-320, 80), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body1, cpv(-160, 240), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body2, cpv(-160, 240), cpv(40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body2, cpv(0, 240), cpv(40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body3, cpv(80, 240), cpv(-40, 80), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body4, cpv(80, 240), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body4, cpv(320, 240), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body5, cpv(-320, 80), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body9, cpv(320, 80), cpv(40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body10, cpv(320, 0), cpv(40, -40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body10, cpv(320, -160), cpv(40, -40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body11, cpv(-320, -160), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body12, cpv(-240, -240), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body12, cpv(0, -240), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body13, cpv(0, -240), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body13, cpv(80, -240), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body14, cpv(80, -240), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body14, cpv(240, -240), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(staticBody, body14, cpv(320, -160), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body1, body5, cpv(40, -40), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body1, body6, cpv(40, -40), cpv(40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body2, body3, cpv(40, 40), cpv(-40, 80), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body3, body4, cpv(-40, 80), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body3, body4, cpv(40, -80), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body3, body7, cpv(40, -80), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body3, body7, cpv(-40, 80), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body3, body8, cpv(40, -80), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body3, body9, cpv(40, -80), cpv(-40, -40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body4, body9, cpv(40, 0), cpv(40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body5, body11, cpv(-40, 40), cpv(-40, 40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body5, body11, cpv(40, -40), cpv(40, -40), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body7, body8, cpv(40, 0), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body8, body12, cpv(-40, 0), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body8, body13, cpv(-40, 0), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body8, body13, cpv(40, 0), cpv(40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body8, body14, cpv(40, 0), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body10, body14, cpv(40, -40), cpv(-40, 0), 0.0f, stiff, damp));
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cpSpaceAddConstraint(space, new_spring(body10, body14, cpv(40, -40), cpv(-40, 0), 0.0f, stiff, damp));
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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 Springies = {
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"Springies", 1.0 / 60.0, init, update, ChipmunkDemoDefaultDrawImpl, destroy,
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};
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