Sourcecode for: Deconstruction of Optical Illusions

OptiA.mm

int main (int argc, const char * argv[])
{
	@autoreleasepool {

		YAVector2i *res = [[YAVector2i alloc] initVals: 800 : 800];
		YAVector4f *backColor = [[YAVector4f alloc] initVals: 0.99 : 0.99 : 0.99 : 1];
		YACanvas *canvas = [[YACanvas alloc] initResolution: res Color: backColor];

		float lineW = 9;
		float lineSP = res.x / 25;

		YAVector2i *startPos = [YAVector2i new];
		YAVector2i *endPos = [YAVector2i new];

		YAVector3f *gridCol = [[YAVector3f alloc] initVal: 0.5];

		startPos.y = 0;
		endPos.y = res.y - 1;
		for(int x = lineSP / 2; x < res.x; x += lineSP ) {
			startPos.x = x; endPos.x = x; [canvas plotLine: startPos To: endPos  Color: gridCol Width: lineW];
		}

		startPos.x = 0;
		endPos.x = res.x - 1;
		for(int y = lineSP / 2; y < res.y; y += lineSP ) {
			startPos.y = y; endPos.y = y; [canvas plotLine: startPos To: endPos  Color: gridCol Width: lineW];
		}

		startPos.y = 0;
		endPos.y = res.y - 1;
		for(int x = - res.x + lineSP; x < res.x; x += lineSP * 2) {
			startPos.x = x; endPos.x = x + res.x; [canvas plotLine: startPos To: endPos  Color: gridCol Width: lineW / 2.0f];
		}

		for(int x = lineSP - floorf(lineW / 2.) ; x < res.x * 2; x += lineSP * 2) {
			startPos.x = x; endPos.x = x - res.x; [canvas plotLine: startPos To: endPos  Color: gridCol Width: lineW / 2.0f];
		}

		YAVector2i *blobRes = [[YAVector2i alloc] initVal: 13];	
		YAVector2i *origin = [[YAVector2i alloc] initVal: (lineSP / 2) - 2];

		YABlob* blobB  = [[YABlob alloc] initCanvas: canvas];
		[blobB.color setValue: 1.0];
		blobB.radius = 6.0f;

		YABlob* blobA  = [[YABlob alloc] initCanvas: canvas];
		[blobA.color setValue: 0.03];
		blobA.radius = 5.0f;

		YAVector2i *blobPos = [YAVector2i new];
		[blobRes sweep: ^(YAVector2i *pos) {
			if(pos.x % 2 == 0 && pos.y % 2 == 0) {
				blobPos.x = pos.x * 2 * lineSP + origin.x;
				blobPos.y = pos.y * 2 * lineSP + origin.y;
				[blobB drawAt: blobPos];
				[blobA drawAt: blobPos];
			}
		}];

		[canvas writeJPGTo: @"Opti_A.jpg"];
	}
}