mesa: Restore 78-column wrapping of license text in C-style comments.

[mesa.git] / src / mesa / math / m_matrix.c

diff --git a/src/mesa/math/m_matrix.c b/src/mesa/math/m_matrix.c
index ef8a40fbecb040477952dfe8849e3a8a998312bd..4f64bd226a0142df0ff9f1589cd035d97b6d2ea7 100644 (file)
--- a/src/mesa/math/m_matrix.c
+++ b/src/mesa/math/m_matrix.c
@@ -17,9 +17,10 @@
  * 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.
  */
 
 
@@ -37,7 +38,6 @@
 #include "main/glheader.h"
 #include "main/imports.h"
 #include "main/macros.h"
-#include "main/imports.h"
 
 #include "m_matrix.h"
 
@@ -46,7 +46,6 @@
  * \defgroup MatFlags MAT_FLAG_XXX-flags
  *
  * Bitmasks to indicate different kinds of 4x4 matrices in GLmatrix::flags
- * It would be nice to make all these flags private to m_matrix.c
  */
 /*@{*/
 #define MAT_FLAG_IDENTITY       0     /**< is an identity matrix flag.
@@ -297,19 +296,15 @@ static void print_matrix_floats( const GLfloat m[16] )
 void
 _math_matrix_print( const GLmatrix *m )
 {
+   GLfloat prod[16];
+
    _mesa_debug(NULL, "Matrix type: %s, flags: %x\n", types[m->type], m->flags);
    print_matrix_floats(m->m);
    _mesa_debug(NULL, "Inverse: \n");
-   if (m->inv) {
-      GLfloat prod[16];
-      print_matrix_floats(m->inv);
-      matmul4(prod, m->m, m->inv);
-      _mesa_debug(NULL, "Mat * Inverse:\n");
-      print_matrix_floats(prod);
-   }
-   else {
-      _mesa_debug(NULL, "  - not available\n");
-   }
+   print_matrix_floats(m->inv);
+   matmul4(prod, m->m, m->inv);
+   _mesa_debug(NULL, "Mat * Inverse:\n");
+   print_matrix_floats(prod);
 }
 
 /*@}*/
@@ -334,7 +329,7 @@ _math_matrix_print( const GLmatrix *m )
 /*@{*/
 
 /**
- * Swaps the values of two floating pointer variables.
+ * Swaps the values of two floating point variables.
  *
  * Used by invert_matrix_general() to swap the row pointers.
  */
@@ -514,7 +509,7 @@ static GLboolean invert_matrix_3d_general( GLmatrix *mat )
 
    det = pos + neg;
 
-   if (det*det < 1e-25)
+   if (FABSF(det) < 1e-25)
       return GL_FALSE;
 
    det = 1.0F / det;
@@ -804,8 +799,8 @@ _math_matrix_rotate( GLmatrix *mat,
    GLfloat m[16];
    GLboolean optimized;
 
-   s = (GLfloat) _mesa_sin( angle * DEG2RAD );
-   c = (GLfloat) _mesa_cos( angle * DEG2RAD );
+   s = (GLfloat) sin( angle * DEG2RAD );
+   c = (GLfloat) cos( angle * DEG2RAD );
 
    memcpy(m, Identity, sizeof(GLfloat)*16);
    optimized = GL_FALSE;
@@ -862,7 +857,7 @@ _math_matrix_rotate( GLmatrix *mat,
    }
 
    if (!optimized) {
-      const GLfloat mag = SQRTF(x * x + y * y + z * z);
+      const GLfloat mag = sqrtf(x * x + y * y + z * z);
 
       if (mag <= 1.0e-4) {
          /* no rotation, leave mat as-is */
@@ -889,7 +884,7 @@ _math_matrix_rotate( GLmatrix *mat,
        *  Y-axis to bring the axis vector parallel with the X-axis.  The
        *  rotation about the X-axis is then performed.  Ry and Rz are
        *  simply the respective inverse transforms to bring the arbitrary
-       *  axis back to it's original orientation.  The first transforms
+       *  axis back to its original orientation.  The first transforms
        *  Rz' and Ry' are considered inverses, since the data from the
        *  arbitrary axis gives you info on how to get to it, not how
        *  to get away from it, and an inverse must be applied.
@@ -1142,9 +1137,7 @@ void
 _math_matrix_set_identity( GLmatrix *mat )
 {
    memcpy( mat->m, Identity, 16*sizeof(GLfloat) );
-
-   if (mat->inv)
-      memcpy( mat->inv, Identity, 16*sizeof(GLfloat) );
+   memcpy( mat->inv, Identity, 16*sizeof(GLfloat) );
 
    mat->type = MATRIX_IDENTITY;
    mat->flags &= ~(MAT_DIRTY_FLAGS|
@@ -1445,17 +1438,9 @@ void
 _math_matrix_copy( GLmatrix *to, const GLmatrix *from )
 {
    memcpy( to->m, from->m, sizeof(Identity) );
+   memcpy(to->inv, from->inv, 16 * sizeof(GLfloat));
    to->flags = from->flags;
    to->type = from->type;
-
-   if (to->inv != 0) {
-      if (from->inv == 0) {
-        matrix_invert( to );
-      }
-      else {
-        memcpy(to->inv, from->inv, sizeof(GLfloat)*16);
-      }
-   }
 }
 
 /**
@@ -1484,10 +1469,12 @@ _math_matrix_loadf( GLmatrix *mat, const GLfloat *m )
 void
 _math_matrix_ctr( GLmatrix *m )
 {
-   m->m = (GLfloat *) _mesa_align_malloc( 16 * sizeof(GLfloat), 16 );
+   m->m = _mesa_align_malloc( 16 * sizeof(GLfloat), 16 );
    if (m->m)
       memcpy( m->m, Identity, sizeof(Identity) );
-   m->inv = NULL;
+   m->inv = _mesa_align_malloc( 16 * sizeof(GLfloat), 16 );
+   if (m->inv)
+      memcpy( m->inv, Identity, sizeof(Identity) );
    m->type = MATRIX_IDENTITY;
    m->flags = 0;
 }
@@ -1512,23 +1499,6 @@ _math_matrix_dtr( GLmatrix *m )
    }
 }
 
-/**
- * Allocate a matrix inverse.
- *
- * \param m matrix.
- *
- * Allocates the matrix inverse, GLmatrix::inv, and sets it to Identity.
- */
-void
-_math_matrix_alloc_inv( GLmatrix *m )
-{
-   if (!m->inv) {
-      m->inv = (GLfloat *) _mesa_align_malloc( 16 * sizeof(GLfloat), 16 );
-      if (m->inv)
-         memcpy( m->inv, Identity, 16 * sizeof(GLfloat) );
-   }
-}
-
 /*@}*/