Initial roughing of custom image location, mandelbrot only

1 files changed, 9 insertions, 7 deletions

diff --git a/algorithms/mandelbrot.c b/algorithms/mandelbrot.c
index 67da2c6..51d0c43 100644
--- a/algorithms/mandelbrot.c
+++ b/algorithms/mandelbrot.c
@@ -31,19 +31,21 @@ void
 *generate_mandelbrot_section(void *section)
 {
 	data_section *d = (data_section*)section;
+	struct frame *f = &(d->parent_frame);
 	unsigned int x,y,i;
 	double a,b;
 	double complex z,c;
-	double size_units = 3.5f;
-	double top = -1.75f;
-	double left = -2.5f;
+
+	defaultsd(&d->parent_frame.top, -1.75f);
+	defaultsd(&d->parent_frame.left, -2.5f);
+	defaultsd(&d->parent_frame.scale, 3.5f);
 
 
 	/* FIXME document this */
-	b = clust_id*(size_units/size)+top; /* FIXME document this */
+	b = clust_id*(f->scale/size)+f->top; /* FIXME document this */
 
 	for (y = clust_id; y < size; y += clust_total) {
-		a = d->core*(size_units/size)+left;
+		a = d->core*(f->scale/size)+f->left;
 		for (x = d->core; x < size; x += cores) {
 			z = 0;
 			c = a + I*b;
@@ -54,9 +56,9 @@ void
 				z = cpow(z , power) + c;
 			}
 			d->data[d->idx++] = (255*i)/iterat;
-			a += cores*(size_units/size);
+			a += cores*(f->scale/size);
 		}
-		b += clust_total*(size_units/size);
+		b += clust_total*(f->scale/size);
 	}
 	return NULL;
 }