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Diffstat (limited to 'nx-X11/extras/Mesa_6.4.2/src/mesa/math/m_norm_tmp.h')
-rw-r--r-- | nx-X11/extras/Mesa_6.4.2/src/mesa/math/m_norm_tmp.h | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.2/src/mesa/math/m_norm_tmp.h b/nx-X11/extras/Mesa_6.4.2/src/mesa/math/m_norm_tmp.h new file mode 100644 index 000000000..a20cb0501 --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.2/src/mesa/math/m_norm_tmp.h @@ -0,0 +1,390 @@ + +/* + * Mesa 3-D graphics library + * Version: 5.1 + * + * 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"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of 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. + */ + +/* + * 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. + */ + +/* + * 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, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])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]; + GLuint i; + + if (!lengths) { + STRIDE_LOOP { + GLfloat tx, ty, tz; + { + const GLfloat ux = from[0], uy = from[1], uz = from[2]; + tx = ux * m0 + uy * m1 + uz * m2; + ty = ux * m4 + uy * m5 + uz * m6; + tz = ux * m8 + uy * m9 + uz * m10; + } + { + GLdouble len = tx*tx + ty*ty + tz*tz; + if (len > 1e-20) { + GLfloat scale = INV_SQRTF(len); + out[i][0] = tx * scale; + out[i][1] = ty * scale; + out[i][2] = tz * scale; + } + else { + out[i][0] = out[i][1] = out[i][2] = 0; + } + } + } + } + else { + if (scale != 1.0) { + m0 *= scale, m4 *= scale, m8 *= scale; + m1 *= scale, m5 *= scale, m9 *= scale; + m2 *= scale, m6 *= scale, m10 *= scale; + } + + STRIDE_LOOP { + GLfloat tx, ty, tz; + { + const GLfloat ux = from[0], uy = from[1], uz = from[2]; + tx = ux * m0 + uy * m1 + uz * m2; + ty = ux * m4 + uy * m5 + uz * m6; + tz = ux * m8 + uy * m9 + uz * m10; + } + { + GLfloat len = lengths[i]; + out[i][0] = tx * len; + out[i][1] = ty * len; + out[i][2] = tz * len; + } + } + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(transform_normalize_normals_no_rot)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])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]; + GLuint i; + + if (!lengths) { + STRIDE_LOOP { + GLfloat tx, ty, tz; + { + const GLfloat ux = from[0], uy = from[1], uz = from[2]; + tx = ux * m0 ; + ty = uy * m5 ; + tz = uz * m10; + } + { + GLdouble len = tx*tx + ty*ty + tz*tz; + if (len > 1e-20) { + GLfloat scale = INV_SQRTF(len); + out[i][0] = tx * scale; + out[i][1] = ty * scale; + out[i][2] = tz * scale; + } + else { + out[i][0] = out[i][1] = out[i][2] = 0; + } + } + } + } + else { + m0 *= scale; + m5 *= scale; + m10 *= scale; + + STRIDE_LOOP { + GLfloat tx, ty, tz; + { + const GLfloat ux = from[0], uy = from[1], uz = from[2]; + tx = ux * m0 ; + ty = uy * m5 ; + tz = uz * m10; + } + { + GLfloat len = lengths[i]; + out[i][0] = tx * len; + out[i][1] = ty * len; + out[i][2] = tz * len; + } + } + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(transform_rescale_normals_no_rot)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])dest->start; + const GLfloat *from = in->start; + const GLuint stride = in->stride; + const GLuint count = in->count; + const GLfloat *m = mat->inv; + 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; + out[i][1] = uy * m5; + out[i][2] = uz * m10; + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(transform_rescale_normals)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])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; + 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; + out[i][1] = ux * m4 + uy * m5 + uz * m6; + out[i][2] = ux * m8 + uy * m9 + uz * m10; + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(transform_normals_no_rot)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])dest->start; + const GLfloat *from = in->start; + const GLuint stride = in->stride; + const GLuint count = in->count; + const GLfloat *m = mat->inv; + 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; + out[i][1] = uy * m5; + out[i][2] = uz * m10; + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(transform_normals)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])dest->start; + const GLfloat *from = in->start; + const GLuint stride = in->stride; + const GLuint count = in->count; + const GLfloat *m = mat->inv; + 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; + out[i][1] = ux * m4 + uy * m5 + uz * m6; + out[i][2] = ux * m8 + uy * m9 + uz * m10; + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(normalize_normals)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])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]; + GLfloat invlen = lengths[i]; + out[i][0] = x * invlen; + out[i][1] = y * invlen; + out[i][2] = z * invlen; + } + } + else { + STRIDE_LOOP { + const GLfloat x = from[0], y = from[1], z = from[2]; + GLdouble len = x * x + y * y + z * z; + if (len > 1e-50) { + len = INV_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; + out[i][1] = y; + out[i][2] = z; + } + } + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(rescale_normals)( const GLmatrix *mat, + GLfloat scale, + const GLvector4f *in, + const GLfloat *lengths, + GLvector4f *dest ) +{ + GLfloat (*out)[4] = (GLfloat (*)[4])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 ); + } + dest->count = in->count; +} + + +static void _XFORMAPI +TAG(init_c_norm_transform)( void ) +{ + _mesa_normal_tab[NORM_TRANSFORM_NO_ROT] = + TAG(transform_normals_no_rot); + + _mesa_normal_tab[NORM_TRANSFORM_NO_ROT | NORM_RESCALE] = + TAG(transform_rescale_normals_no_rot); + + _mesa_normal_tab[NORM_TRANSFORM_NO_ROT | NORM_NORMALIZE] = + TAG(transform_normalize_normals_no_rot); + + _mesa_normal_tab[NORM_TRANSFORM] = + TAG(transform_normals); + + _mesa_normal_tab[NORM_TRANSFORM | NORM_RESCALE] = + TAG(transform_rescale_normals); + + _mesa_normal_tab[NORM_TRANSFORM | NORM_NORMALIZE] = + TAG(transform_normalize_normals); + + _mesa_normal_tab[NORM_RESCALE] = + TAG(rescale_normals); + + _mesa_normal_tab[NORM_NORMALIZE] = + TAG(normalize_normals); +} |