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-rw-r--r--src/mesa/math/m_norm_tmp.h131
1 files changed, 78 insertions, 53 deletions
diff --git a/src/mesa/math/m_norm_tmp.h b/src/mesa/math/m_norm_tmp.h
index cc5ff00b3d..c0d6fac96b 100644
--- a/src/mesa/math/m_norm_tmp.h
+++ b/src/mesa/math/m_norm_tmp.h
@@ -1,10 +1,10 @@
-/* $Id: m_norm_tmp.h,v 1.8 2001/06/28 17:34:14 keithw Exp $ */
+/* $Id: m_norm_tmp.h,v 1.9 2002/01/05 14:12:24 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 4.1
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -28,9 +28,22 @@
* New (3.1) transformation code written by Keith Whitwell.
*/
+/* Functions to tranform a vector of normals. This includes applying
+ * the transformation matrix, rescaling and normalization.
+ */
+
#include <math.h>
#include "m_vertices.h"
+
+/*
+ * mat - the 4x4 transformation matrix
+ * scale - uniform scale factor of the transformation matrix (not always used)
+ * in - the source vector of normals
+ * lengths - length of each incoming normal (may be NULL) (a display list
+ * optimization)
+ * dest - the destination vector of normals
+ */
static void _XFORMAPI
TAG(transform_normalize_normals)( const GLmatrix *mat,
GLfloat scale,
@@ -38,15 +51,15 @@ TAG(transform_normalize_normals)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
- GLfloat *m = mat->inv;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
+ const GLfloat *m = mat->inv;
GLfloat m0 = m[0], m4 = m[4], m8 = m[8];
GLfloat m1 = m[1], m5 = m[5], m9 = m[9];
GLfloat m2 = m[2], m6 = m[6], m10 = m[10];
+ GLuint i;
if (!lengths) {
STRIDE_LOOP {
@@ -65,8 +78,7 @@ TAG(transform_normalize_normals)( const GLmatrix *mat,
out[i][1] = (GLfloat) (ty * scale);
out[i][2] = (GLfloat) (tz * scale);
}
- else
- {
+ else {
out[i][0] = out[i][1] = out[i][2] = 0;
}
}
@@ -106,15 +118,16 @@ TAG(transform_normalize_normals_no_rot)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
- GLfloat *m = mat->inv;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
+ const GLfloat *m = mat->inv;
GLfloat m0 = m[0];
GLfloat m5 = m[5];
GLfloat m10 = m[10];
+ GLuint i;
+
if (!lengths) {
STRIDE_LOOP {
GLfloat tx, ty, tz;
@@ -132,8 +145,7 @@ TAG(transform_normalize_normals_no_rot)( const GLmatrix *mat,
out[i][1] = (GLfloat) (ty * scale);
out[i][2] = (GLfloat) (tz * scale);
}
- else
- {
+ else {
out[i][0] = out[i][1] = out[i][2] = 0;
}
}
@@ -171,16 +183,18 @@ TAG(transform_rescale_normals_no_rot)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
const GLfloat *m = mat->inv;
- GLfloat m0 = scale*m[0];
- GLfloat m5 = scale*m[5];
- GLfloat m10 = scale*m[10];
+ const GLfloat m0 = scale*m[0];
+ const GLfloat m5 = scale*m[5];
+ const GLfloat m10 = scale*m[10];
+ GLuint i;
+
(void) lengths;
+
STRIDE_LOOP {
GLfloat ux = from[0], uy = from[1], uz = from[2];
out[i][0] = ux * m0;
@@ -190,6 +204,7 @@ TAG(transform_rescale_normals_no_rot)( const GLmatrix *mat,
dest->count = in->count;
}
+
static void _XFORMAPI
TAG(transform_rescale_normals)( const GLmatrix *mat,
GLfloat scale,
@@ -197,19 +212,21 @@ TAG(transform_rescale_normals)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
/* Since we are unlikely to have < 3 vertices in the buffer,
* it makes sense to pre-multiply by scale.
*/
const GLfloat *m = mat->inv;
- GLfloat m0 = scale*m[0], m4 = scale*m[4], m8 = scale*m[8];
- GLfloat m1 = scale*m[1], m5 = scale*m[5], m9 = scale*m[9];
- GLfloat m2 = scale*m[2], m6 = scale*m[6], m10 = scale*m[10];
+ const GLfloat m0 = scale*m[0], m4 = scale*m[4], m8 = scale*m[8];
+ const GLfloat m1 = scale*m[1], m5 = scale*m[5], m9 = scale*m[9];
+ const GLfloat m2 = scale*m[2], m6 = scale*m[6], m10 = scale*m[10];
+ GLuint i;
+
(void) lengths;
+
STRIDE_LOOP {
GLfloat ux = from[0], uy = from[1], uz = from[2];
out[i][0] = ux * m0 + uy * m1 + uz * m2;
@@ -227,17 +244,19 @@ TAG(transform_normals_no_rot)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
const GLfloat *m = mat->inv;
- GLfloat m0 = m[0];
- GLfloat m5 = m[5];
- GLfloat m10 = m[10];
+ const GLfloat m0 = m[0];
+ const GLfloat m5 = m[5];
+ const GLfloat m10 = m[10];
+ GLuint i;
+
(void) scale;
(void) lengths;
+
STRIDE_LOOP {
GLfloat ux = from[0], uy = from[1], uz = from[2];
out[i][0] = ux * m0;
@@ -255,17 +274,19 @@ TAG(transform_normals)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
const GLfloat *m = mat->inv;
- GLfloat m0 = m[0], m4 = m[4], m8 = m[8];
- GLfloat m1 = m[1], m5 = m[5], m9 = m[9];
- GLfloat m2 = m[2], m6 = m[6], m10 = m[10];
+ const GLfloat m0 = m[0], m4 = m[4], m8 = m[8];
+ const GLfloat m1 = m[1], m5 = m[5], m9 = m[9];
+ const GLfloat m2 = m[2], m6 = m[6], m10 = m[10];
+ GLuint i;
+
(void) scale;
(void) lengths;
+
STRIDE_LOOP {
GLfloat ux = from[0], uy = from[1], uz = from[2];
out[i][0] = ux * m0 + uy * m1 + uz * m2;
@@ -283,13 +304,15 @@ TAG(normalize_normals)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
+ GLuint i;
+
(void) mat;
(void) scale;
+
if (lengths) {
STRIDE_LOOP {
const GLfloat x = from[0], y = from[1], z = from[2];
@@ -327,13 +350,15 @@ TAG(rescale_normals)( const GLmatrix *mat,
const GLfloat *lengths,
GLvector3f *dest )
{
- GLuint i;
- const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
GLfloat (*out)[3] = (GLfloat (*)[3])dest->start;
+ const GLfloat *from = in->start;
+ const GLuint stride = in->stride;
+ const GLuint count = in->count;
+ GLuint i;
+
(void) mat;
(void) lengths;
+
STRIDE_LOOP {
SCALE_SCALAR_3V( out[i], scale, from );
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 19:39:06 +0000