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Examples: Mandelbrot reads num iterations from stdin

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This commit is contained in:
Alex Hirsch 2019-03-03 12:01:55 +01:00
parent b52454b7ab
commit eebbc9cab7
2 changed files with 8 additions and 4 deletions
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11
examples/mandelbrot/mandelbrot.mc
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@ -12,7 +12,7 @@ float transform_y(float y)
return ((1.0) - ((1.0) - (-1.0)) * (fy / 50.0)) * 2.0; return ((1.0) - ((1.0) - (-1.0)) * (fy / 50.0)) * 2.0;
} }
bool is_in_set(float pX, float pY) bool is_in_set(float pX, float pY, int iterations)
{ {
float temp; float temp;
float x; float x;
@ -23,14 +23,14 @@ bool is_in_set(float pX, float pY)
y = 0.0; y = 0.0;
i = 0; i = 0;
while (((x * x + y * y) <= 4.0) && i < 30) { while (((x * x + y * y) <= 4.0) && i < iterations) {
temp = x * x - y * y + pX; temp = x * x - y * y + pX;
y = 2.0 * x * y + pY; y = 2.0 * x * y + pY;
x = temp; x = temp;
i = i + 1; i = i + 1;
} }
if (i == 30) if (i == iterations)
return true; return true;
return false; return false;
@ -45,6 +45,9 @@ int main()
y = 0.0; y = 0.0;
int iterations;
iterations = read_int();
while (y < 50.0) { while (y < 50.0) {
x = 0.0; x = 0.0;
@ -53,7 +56,7 @@ int main()
fy = transform_y(y); fy = transform_y(y);
x = x + 1.0; x = x + 1.0;
if (is_in_set(fx, fy)) { if (is_in_set(fx, fy, iterations)) {
print("."); print(".");
} else { } else {
print(" "); print(" ");

1
examples/mandelbrot/mandelbrot.stdin.txt
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@ -0,0 +1 @@
30