- correct handling of sz in matrix_transform() - this should allow

[imager.git] / rotate.c

diff --git a/rotate.c b/rotate.c
index 6dee34fcfdd68b9364b015ae8fb469db8f5b8313..5beba6688000ee7dcec36b3c4fec8405ba83fe5f 100644 (file)
--- a/rotate.c
+++ b/rotate.c
@@ -211,7 +211,7 @@ i_img *i_matrix_transform_bg(i_img *src, int xsize, int ysize, const double *mat
           /* dividing by sz gives us the ability to do perspective 
              transforms */
           sz = x * matrix[6] + y * matrix[7] + matrix[8];
-          if (abs(sz) > 0.0000001) {
+          if (fabs(sz) > 0.0000001) {
             sx = (x * matrix[0] + y * matrix[1] + matrix[2]) / sz;
             sy = (x * matrix[3] + y * matrix[4] + matrix[5]) / sz;
           }
@@ -221,7 +221,7 @@ i_img *i_matrix_transform_bg(i_img *src, int xsize, int ysize, const double *mat
 
           /* anything outside these ranges is either a broken co-ordinate
              or outside the source */
-          if (abs(sz) > 0.0000001 
+          if (fabs(sz) > 0.0000001 
               && sx >= -1 && sx < src->xsize
               && sy >= -1 && sy < src->ysize) {
 
@@ -289,7 +289,7 @@ i_img *i_matrix_transform_bg(i_img *src, int xsize, int ysize, const double *mat
           /* dividing by sz gives us the ability to do perspective 
              transforms */
           sz = x * matrix[6] + y * matrix[7] + matrix[8];
-          if (abs(sz) > 0.0000001) {
+          if (fabs(sz) > 0.0000001) {
             sx = (x * matrix[0] + y * matrix[1] + matrix[2]) / sz;
             sy = (x * matrix[3] + y * matrix[4] + matrix[5]) / sz;
           }
@@ -299,7 +299,7 @@ i_img *i_matrix_transform_bg(i_img *src, int xsize, int ysize, const double *mat
 
           /* anything outside these ranges is either a broken co-ordinate
              or outside the source */
-          if (abs(sz) > 0.0000001 
+          if (fabs(sz) > 0.0000001 
               && sx >= -1 && sx < src->xsize
               && sy >= -1 && sy < src->ysize) {