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#include <stdlib.h>

#include "png.h"

extern long image_memory(int numbytes, void *data_ptr);
extern void throw_error(char *filename, char *error);

#define PNG_SIG_BYTES 8

static void

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    const NSUInteger testCount = 1000000;
    {
	GLKMatrix4 m = M; // Initialized from a global to prevent constant folding when inlining.
				
        CFAbsoluteTime t = CFAbsoluteTimeGetCurrent();
        for (NSUInteger i = 0; i < testCount; i++) {
		m = GLKMatrix4Multiply(m, m);
        }
        NSLog(@"time GLKit: %f", CFAbsoluteTimeGetCurrent() - t);
	M = m; // Need to save the value of m to avoid it being optimized away

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[ Launch: mustache phase ] 6708324 by slembcke[ Launch: i wish this was a mustache emporium ] 6707845 by gelicia[ Launch: i wish this was a mustache emporium ] 6690695 by gelicia

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[ Launch: XOR Triangles ] 6402424 by slembcke

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[ Launch: xor squares ] 6386076 by slembcke[ Launch: Lissajous ] 6384402 by gelicia[ Launch: Lissajous ] 6378631 by slembcke

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[ Launch: xor circles ] 6385454 by slembcke

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[ Launch: Lissajous ] 6378631 by slembcke

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// Old slice code:
	cpVect centroid = cpCentroidForPoly(clippedCount, clipped);
	cpFloat mass = cpAreaForPoly(clippedCount, clipped)*DENSITY;
	cpFloat moment = cpMomentForPoly(mass, clippedCount, clipped, cpvneg(centroid));
	
	cpBody *new_body = cpSpaceAddBody(space, cpBodyNew(mass, moment));
	cpBodySetPos(new_body, centroid);
	cpBodySetVel(new_body, cpBodyGetVelAtWorldPoint(body, centroid));
	cpBodySetAngVel(new_body, cpBodyGetAngVel(body));
	

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// Basically in C you only get a single return value,
// but there are ways around that.

// The first, and more common method is to return things using references.
// Pass pointers to the output variables, and write the output values to them.
// While it's common, a lot of people think it's a really bad practice (self included).

void ReturnMultiple1(int a, int b, int *outX, int *outY)
{
  // Write to the output variables.

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  {
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);
		cpVect b = cpvmult(cpvforangle(1.0), 1.0);
		cpVect c = a;
		cpVect v = cpvslerp(a, b, 0.0);
		GHAssertLessThan(cpvdist(v, c), (cpFloat)1e-5, nil);
	}
	
	{
		cpVect a = cpvmult(cpvforangle(0.0), 1.0);