mirror of https://github.com/axmolengine/axmol.git
117 lines
3.5 KiB
C
117 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 <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include "chipmunk.h"
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#include "chipmunk_unsafe.h"
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#include "drawSpace.h"
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#include "ChipmunkDemo.h"
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static cpSpace *space;
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static cpBody *staticBody;
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#define NUM_CIRCLES 30
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cpShape *circles[NUM_CIRCLES];
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cpFloat circleRadius = 30.0f;
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static void
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update(int ticks)
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{
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if(arrowDirection.y){
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circleRadius = cpfmax(10.0f, circleRadius + arrowDirection.y);
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for(int i=0; i<NUM_CIRCLES; i++){
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circles[i]->body->m = cpMomentForCircle(1.0f, 0.0f, circleRadius, cpvzero);
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cpCircleShapeSetRadius(circles[i], circleRadius);
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}
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}
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int steps = 1;
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cpFloat dt = 1.0f/60.0f/(cpFloat)steps;
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for(int i=0; i<steps; i++){
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cpSpaceStep(space, dt);
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}
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}
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static cpSpace *
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init(void)
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{
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staticBody = cpBodyNew(INFINITY, INFINITY);
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cpResetShapeIdCounter();
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space = cpSpaceNew();
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space->iterations = 5;
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space->gravity = cpv(0, -100);
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cpSpaceResizeStaticHash(space, 40.0f, 999);
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cpSpaceResizeActiveHash(space, 30.0f, 2999);
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cpBody *body;
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cpShape *shape;
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(-320,240), 0.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->layers = NOT_GRABABLE_MASK;
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(320,-240), cpv(320,240), 0.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->layers = NOT_GRABABLE_MASK;
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(320,-240), 0.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->layers = NOT_GRABABLE_MASK;
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for(int i=0; i<NUM_CIRCLES; i++){
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body = cpSpaceAddBody(space, cpBodyNew(1.0f, cpMomentForCircle(1.0f, 0.0f, circleRadius, cpvzero)));
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body->p = cpvmult(cpv(frand()*2.0f - 1.0f, frand()*2.0f - 1.0f), circleRadius*5.0f);
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circles[i] = shape = cpSpaceAddShape(space, cpCircleShapeNew(body, circleRadius, cpvzero));
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shape->e = 0.0f; shape->u = 1.0f;
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}
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strcat(messageString,
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"chipmunk_unsafe.h Contains functions for changing shapes, but they can cause severe stability problems if used incorrectly.\n"
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"Shape changes occur as instantaneous changes to position without an accompanying velocity change. USE WITH CAUTION!");
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return space;
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}
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static void
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destroy(void)
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{
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cpBodyFree(staticBody);
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cpSpaceFreeChildren(space);
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cpSpaceFree(space);
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}
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chipmunkDemo UnsafeOps = {
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"Unsafe Operations",
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NULL,
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init,
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update,
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destroy,
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};
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