From 7312e58d17e331d71d4f47e21bf15499609bace8 Mon Sep 17 00:00:00 2001
From: dieter kovacic <d13@users.sourceforge.net>
Date: Tue, 9 Jul 2002 12:41:56 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r33, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/ext13/; revision=34
---
 mandelbrot~.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 mandelbrot~.c

(limited to 'mandelbrot~.c')

diff --git a/mandelbrot~.c b/mandelbrot~.c
new file mode 100644
index 0000000..76cc108
--- /dev/null
+++ b/mandelbrot~.c
@@ -0,0 +1,122 @@
+#include "m_pd.h"
+
+/* ----------------------------- mandelbrot~ ----------------------------- */
+t_class *mandelbrot_tilde_class;
+
+typedef struct _mandelbrot_tilde
+{
+    t_object x_obj;
+    float k;
+    float cr;
+    float ci;
+} t_mandelbrot_tilde;
+
+void *mandelbrot_tilde_new(t_symbol *s, t_floatarg f)
+{
+	t_mandelbrot_tilde *x = (t_mandelbrot_tilde *)pd_new(mandelbrot_tilde_class);
+	inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+	floatinlet_new(&x->x_obj, &x->k);
+	x->k = f;
+	outlet_new(&x->x_obj, &s_signal);
+	return (x);
+}
+
+
+static int mandelbrot_calc(t_float *cr, t_float *ci, int k)
+{ 
+   int i = -2;
+   t_float zr = 0;
+   t_float zi = 0;
+   t_float z2r = 0;
+   t_float z2i = 0;
+   while ((z2r + z2i < 4 ) && (++i < k )) {
+     z2r = zr * zr;
+     z2i = zi * zi;
+     zi = 2 * zr * zi + *ci;
+     zr = z2r - z2i + *cr;
+   }
+   return(i);
+}
+
+
+static int mandelbrot_calc8(float cr, float ci, int k)
+{ 
+   int i = -2;
+   t_float zr = 0;
+   t_float zi = 0;
+   t_float z2r = 0;
+   t_float z2i = 0;
+  while ((z2r + z2i < 4 ) && (++i < k )) {
+     z2r = zr * zr;
+     z2i = zi * zi;
+     zi = 2 * zr * zi + ci;
+     zr = z2r - z2i + cr;
+  }
+  return(i);
+}
+
+
+                                        
+t_int *mandelbrot_tilde_perform(t_int *w)
+{
+
+    t_mandelbrot_tilde *x = (t_mandelbrot_tilde *)(w[1]);
+    t_float *in1 = (t_float *)(w[2]);
+    t_float *in2 = (t_float *)(w[3]);
+    t_float *out = (t_float *)(w[4]);
+    int n = (int)(w[5]);
+    while (n--) *out++ = (t_float)mandelbrot_calc (in1++,in2++, x->k);
+    return (w+6);
+}
+
+
+t_int *mandelbrot_tilde_perf8(t_int *w)
+{
+  t_mandelbrot_tilde *x = (t_mandelbrot_tilde *)(w[1]);
+  t_float *in1 = (t_float *)(w[2]);
+  t_float *in2 = (t_float *)(w[3]);
+  t_float *out = (t_float *)(w[4]);
+  int n = (int)(w[5]);
+  for (; n; n -= 8, in1 += 8, in2 += 8, out += 8)
+  {
+     float f0 = in1[0], f1 = in1[1], f2 = in1[2], f3 = in1[3];
+     float f4 = in1[4], f5 = in1[5], f6 = in1[6], f7 = in1[7];
+
+     float g0 = in2[0], g1 = in2[1], g2 = in2[2], g3 = in2[3];
+     float g4 = in2[4], g5 = in2[5], g6 = in2[6], g7 = in2[7];
+     out[0] = mandelbrot_calc8(f0 ,g0,x->k);
+     out[1] = mandelbrot_calc8(f1 ,g1,x->k);
+     out[2] = mandelbrot_calc8(f2 ,g2,x->k);
+     out[3] = mandelbrot_calc8(f3 ,g3,x->k);
+     out[4] = mandelbrot_calc8(f4 ,g4,x->k);
+     out[5] = mandelbrot_calc8(f5 ,g5,x->k);
+     out[6] = mandelbrot_calc8(f6 ,g6,x->k);
+     out[7] = mandelbrot_calc8(f7 ,g7,x->k);
+
+  }
+  return (w+6);
+}
+
+
+void dsp_add_mandelbrot_tilde(t_mandelbrot_tilde *x,t_sample *in1, t_sample *in2, t_sample *out, int n)
+{
+    if (n&7)
+    	dsp_add(mandelbrot_tilde_perform, 5, x, in1, in2, out, n);
+    else	
+    	dsp_add(mandelbrot_tilde_perf8, 5, x, in1, in2, out, n);
+}
+
+void mandelbrot_tilde_dsp(t_mandelbrot_tilde *x, t_signal **sp)
+{
+    dsp_add_mandelbrot_tilde(x,sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
+}
+
+
+void mandelbrot_tilde_setup(void)
+{
+    mandelbrot_tilde_class = class_new(gensym("mandelbrot~"), (t_newmethod)mandelbrot_tilde_new,
+    0, sizeof(t_mandelbrot_tilde), 0, A_DEFFLOAT, 0);
+    class_addmethod(mandelbrot_tilde_class, (t_method)mandelbrot_tilde_dsp, gensym("dsp"), 0);
+    CLASS_MAINSIGNALIN(mandelbrot_tilde_class, t_mandelbrot_tilde, k);
+}
+
-- 
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