From cdf8ded57019d5c905f16422d40be7b1a18ab3bc Mon Sep 17 00:00:00 2001
From: Tom Schouten <doelie@users.sourceforge.net>
Date: Tue, 21 Jan 2003 10:18:19 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r350, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/creb/; revision=351
---
 modules/qnorm.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 modules/qnorm.c

(limited to 'modules/qnorm.c')

diff --git a/modules/qnorm.c b/modules/qnorm.c
new file mode 100644
index 0000000..e826b1b
--- /dev/null
+++ b/modules/qnorm.c
@@ -0,0 +1,137 @@
+/*
+ *   qnorm.c  - quaternion normalization dsp object 
+ *   Copyright (c) 2000-2003 by Tom Schouten
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "m_pd.h"
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+
+
+typedef struct qnormctl
+{
+  t_float *c_input[4];
+  t_float *c_output[4];
+} t_qnormctl;
+
+typedef struct qnorm
+{
+  t_object x_obj;
+  t_float x_f;
+  t_qnormctl x_ctl;
+} t_qnorm;
+
+
+static t_int *qnorm_perform(t_int *word)
+{
+
+
+
+  t_qnormctl *ctl     = (t_qnormctl *)(word[1]);
+  t_int n             = (t_int)(word[2]);
+  t_int i;
+
+  t_float *in0        = ctl->c_input[0];
+  t_float *in1        = ctl->c_input[1];
+  t_float *in2        = ctl->c_input[2];
+  t_float *in3        = ctl->c_input[3];
+
+  t_float *out0       = ctl->c_output[0];
+  t_float *out1       = ctl->c_output[1];
+  t_float *out2       = ctl->c_output[2];
+  t_float *out3       = ctl->c_output[3];
+
+  t_float w, x, y, z;
+  t_float norm;
+  t_float inorm;
+
+  for (i=0;i<n;i++)
+    {
+
+	/* read input */
+	w = *in0++;
+	x = *in1++;
+	y = *in2++;
+	z = *in3++;
+
+	/* transform */
+	norm = w * w;
+	norm += x * x;
+	norm += y * y;
+	norm += z * z;
+	
+	inorm = (norm == 0.0f) ? (0.0f) : (1.0f / sqrt(norm));
+
+	/* write output */
+	*out0++ = w * inorm;
+	*out1++ = x * inorm;
+	*out2++ = y * inorm;
+	*out3++ = z * inorm;
+    }
+
+   
+  return (word+3);
+}
+
+
+
+static void qnorm_dsp(t_qnorm *x, t_signal **sp)
+{
+
+    int i;
+  for (i=0;i<4;i++)
+    {
+      x->x_ctl.c_input[i] = sp[i]->s_vec;
+      x->x_ctl.c_output[i] = sp[i+4]->s_vec;
+    }
+
+  dsp_add(qnorm_perform, 2, &x->x_ctl, sp[0]->s_n);
+
+
+}                                  
+
+
+static void qnorm_free(t_qnorm *x)
+{
+
+}
+
+t_class *qnorm_class;
+
+static void *qnorm_new(t_floatarg channels)
+{
+    int i;
+    t_qnorm *x = (t_qnorm *)pd_new(qnorm_class);
+
+    for (i=1;i<4;i++) inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("signal"), gensym("signal")); 
+    for (i=0;i<4;i++) outlet_new(&x->x_obj, gensym("signal")); 
+
+    return (void *)x;
+}
+
+void qnorm_tilde_setup(void)
+{
+  //post("qnorm~ v0.1");
+    qnorm_class = class_new(gensym("qnorm~"), (t_newmethod)qnorm_new,
+    	(t_method)qnorm_free, sizeof(t_qnorm), 0, 0);
+    CLASS_MAINSIGNALIN(qnorm_class, t_qnorm, x_f); 
+    class_addmethod(qnorm_class, (t_method)qnorm_dsp, gensym("dsp"), 0); 
+
+}
+
-- 
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