-/* $Id: m_norm_tmp.h,v 1.7 2001/03/30 14:44:43 gareth Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 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"),
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* New (3.1) transformation code written by Keith Whitwell.
*/
-#include <math.h>
-#include "m_vertices.h"
+/* Functions to tranform a vector of normals. This includes applying
+ * the transformation matrix, rescaling and normalization.
+ */
-static void _XFORMAPI
+/*
+ * 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
TAG(transform_normalize_normals)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
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 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 {
{
GLdouble len = tx*tx + ty*ty + tz*tz;
if (len > 1e-20) {
- GLdouble scale = 1.0 / GL_SQRT(len);
- out[i][0] = (GLfloat) (tx * scale);
- out[i][1] = (GLfloat) (ty * scale);
- out[i][2] = (GLfloat) (tz * scale);
+ GLfloat scale = 1.0f / sqrtf(len);
+ out[i][0] = tx * scale;
+ out[i][1] = ty * scale;
+ out[i][2] = tz * scale;
}
- else
- {
+ else {
out[i][0] = out[i][1] = out[i][2] = 0;
}
}
}
}
else {
- if (scale != 1.0) {
+ if (scale != 1.0f) {
m0 *= scale, m4 *= scale, m8 *= scale;
m1 *= scale, m5 *= scale, m9 *= scale;
m2 *= scale, m6 *= scale, m10 *= scale;
}
-static void _XFORMAPI
+static void
TAG(transform_normalize_normals_no_rot)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
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 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;
{
GLdouble len = tx*tx + ty*ty + tz*tz;
if (len > 1e-20) {
- GLdouble scale = 1.0 / GL_SQRT(len);
- out[i][0] = (GLfloat) (tx * scale);
- out[i][1] = (GLfloat) (ty * scale);
- out[i][2] = (GLfloat) (tz * scale);
+ GLfloat scale = 1.0f / sqrtf(len);
+ out[i][0] = tx * scale;
+ out[i][1] = ty * scale;
+ out[i][2] = tz * scale;
}
- else
- {
+ else {
out[i][0] = out[i][1] = out[i][2] = 0;
}
}
}
}
else {
- /* scale has been snapped to 1.0 if it is close.
- */
- if (scale != 1.0) {
- m0 *= scale;
- m5 *= scale;
- m10 *= scale;
- }
+ m0 *= scale;
+ m5 *= scale;
+ m10 *= scale;
STRIDE_LOOP {
GLfloat tx, ty, tz;
}
-static void _XFORMAPI
+static void
TAG(transform_rescale_normals_no_rot)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
- GLfloat (*out)[3] = (GLfloat (*)[3])dest->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;
dest->count = in->count;
}
-static void _XFORMAPI
+
+static void
TAG(transform_rescale_normals)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
- GLfloat (*out)[3] = (GLfloat (*)[3])dest->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;
}
-static void _XFORMAPI
+static void
TAG(transform_normals_no_rot)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
- GLfloat (*out)[3] = (GLfloat (*)[3])dest->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;
}
-static void _XFORMAPI
+static void
TAG(transform_normals)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
- GLfloat (*out)[3] = (GLfloat (*)[3])dest->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;
}
-static void _XFORMAPI
+static void
TAG(normalize_normals)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
- GLfloat (*out)[3] = (GLfloat (*)[3])dest->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];
const GLfloat x = from[0], y = from[1], z = from[2];
GLdouble len = x * x + y * y + z * z;
if (len > 1e-50) {
- len = 1.0 / GL_SQRT(len);
- out[i][0] = (GLfloat) (x * len);
- out[i][1] = (GLfloat) (y * len);
- out[i][2] = (GLfloat) (z * len);
+ len = 1.0f / sqrtf(len);
+ out[i][0] = (GLfloat)(x * len);
+ out[i][1] = (GLfloat)(y * len);
+ out[i][2] = (GLfloat)(z * len);
}
else {
out[i][0] = x;
}
-static void _XFORMAPI
+static void
TAG(rescale_normals)( const GLmatrix *mat,
GLfloat scale,
- const GLvector3f *in,
+ const GLvector4f *in,
const GLfloat *lengths,
- GLvector3f *dest )
+ GLvector4f *dest )
{
- GLuint i;
+ GLfloat (*out)[4] = (GLfloat (*)[4])dest->start;
const GLfloat *from = in->start;
- GLuint stride = in->stride;
- GLuint count = in->count;
- GLfloat (*out)[3] = (GLfloat (*)[3])dest->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 );
}
}
-static void _XFORMAPI
+static void
TAG(init_c_norm_transform)( void )
{
_mesa_normal_tab[NORM_TRANSFORM_NO_ROT] =
projects / mesa.git / blobdiff