Copied tricorn to tricorn_simd .h and .c files to be later modified into SIMD optimization. Changed converge definition to static in order to not have conflicts with other versions of the function as it is an internal helper function
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@@ -1,7 +1,7 @@
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#include "tricorn.h"
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static const float convergenceLimit = 2.0f; // Mandelbrot set limit
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unsigned converge(float complex position,unsigned n);
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static unsigned converge(float complex position,unsigned n);
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void tricorn(float complex start, size_t width, ssize_t height, float res, unsigned n, _Bool color, unsigned char* img){
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@@ -34,7 +34,7 @@ void tricorn(float complex start, size_t width, ssize_t height, float res, unsig
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}
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// Iterative application of the equation given by the assignment
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unsigned converge(float complex position,unsigned n){
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static unsigned converge(float complex position,unsigned n){
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complex float result = 0;
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for(unsigned i = 0; i < n; i++){
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@@ -0,0 +1,51 @@
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#include "tricorn.h"
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static const float convergenceLimit = 2.0f; // Mandelbrot set limit
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static unsigned converge(float complex position,unsigned n);
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void tricorn_simd(float complex start, size_t width, ssize_t height, float res, unsigned n, _Bool color, unsigned char* img){
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// Absolute height for iteration purposes
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height = height < 0 ? height*-1 : height;
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// Simple iteration over every pixel in the picture
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for(size_t i = 0; i < width; i++){
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for(ssize_t j = 0; j < height; j++){
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unsigned value = converge(start + (i*res - I*j*res),n);
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// Pixel value position in the output array
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size_t position = (j*width +i) *3;
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if(!color){ // Grayscale colors as specified by the assignment r = g = b
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img[position] = value;
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img[position + 1] = value;
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img[position + 2] = value;
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}
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else{ // Temporary colors with random multipliers
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img[position] = ((value*3) % 255);
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img[position + 1] = ((value*2) % 255) ;
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img[position + 2] = ((value*5) % 255);
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}
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}
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}
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}
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// Iterative application of the equation given by the assignment
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static unsigned converge(float complex position,unsigned n){
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complex float result = 0;
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for(unsigned i = 0; i < n; i++){
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// Application of the given complex equation with m = 2
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result = cpowf(conjf(result),2) + position;
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// Detection of unbounded behaviour
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// If the magnitude of the result vector is greater than the convergence limit, we know that the function will grow unbounded
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// Current convergence limit taken from mandelbrot set
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if(sqrtf(powf (crealf(result),2)+powf(cimagf(result),2)) > convergenceLimit)
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return 255-4*(i % 64);
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}
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return 0;
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}
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@@ -0,0 +1,5 @@
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#include <complex.h>
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#include <stddef.h>
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#include <math.h>
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#include <sys/types.h>
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void tricorn_simd(float complex start, size_t width, ssize_t height, float res, unsigned n, _Bool color, unsigned char* img);
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