new comments, misc clean-up

1 files changed, 93 insertions, 28 deletions

diff --git a/src/mesa/main/matrix.h b/src/mesa/main/matrix.h
index b142afb..f35af5e 100644
--- a/src/mesa/main/matrix.h
+++ b/src/mesa/main/matrix.h
@@ -1,10 +1,10 @@
-/* $Id: matrix.h,v 1.6 2000/06/27 22:10:00 brianp Exp $ */
+/* $Id: matrix.h,v 1.7 2000/09/17 21:56:07 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
- * Version:  3.3
+ * Version:  3.5
  * 
- * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2000  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"),
@@ -33,11 +33,77 @@
 #include "config.h"
 
 
+/* Give symbolic names to some of the entries in the matrix to help
+ * out with the rework of the viewport_map as a matrix transform.
+ */
+#define MAT_SX 0
+#define MAT_SY 5
+#define MAT_SZ 10
+#define MAT_TX 12
+#define MAT_TY 13
+#define MAT_TZ 14
+
+
+/*
+ * Different kinds of 4x4 transformation matrices:
+ */
+#define MATRIX_GENERAL		0	/* general 4x4 matrix */
+#define MATRIX_IDENTITY		1	/* identity matrix */
+#define MATRIX_3D_NO_ROT	2	/* ortho projection and others... */
+#define MATRIX_PERSPECTIVE	3	/* perspective projection matrix */
+#define MATRIX_2D		4	/* 2-D transformation */
+#define MATRIX_2D_NO_ROT	5	/* 2-D scale & translate only */
+#define MATRIX_3D		6	/* 3-D transformation */
+
+#define MAT_FLAG_IDENTITY       0
+#define MAT_FLAG_GENERAL        0x1
+#define MAT_FLAG_ROTATION       0x2
+#define MAT_FLAG_TRANSLATION    0x4
+#define MAT_FLAG_UNIFORM_SCALE  0x8
+#define MAT_FLAG_GENERAL_SCALE  0x10
+#define MAT_FLAG_GENERAL_3D     0x20
+#define MAT_FLAG_PERSPECTIVE    0x40
+#define MAT_DIRTY_TYPE          0x80
+#define MAT_DIRTY_FLAGS         0x100
+#define MAT_DIRTY_INVERSE       0x200
+#define MAT_DIRTY_DEPENDENTS    0x400
+
+#define MAT_FLAGS_ANGLE_PRESERVING (MAT_FLAG_ROTATION | \
+				    MAT_FLAG_TRANSLATION | \
+				    MAT_FLAG_UNIFORM_SCALE)
+
+#define MAT_FLAGS_LENGTH_PRESERVING (MAT_FLAG_ROTATION | \
+				     MAT_FLAG_TRANSLATION)
+
+#define MAT_FLAGS_3D (MAT_FLAG_ROTATION | \
+		      MAT_FLAG_TRANSLATION | \
+		      MAT_FLAG_UNIFORM_SCALE | \
+		      MAT_FLAG_GENERAL_SCALE | \
+		      MAT_FLAG_GENERAL_3D)
+
+#define MAT_FLAGS_GEOMETRY (MAT_FLAG_GENERAL | \
+			    MAT_FLAG_ROTATION | \
+			    MAT_FLAG_TRANSLATION | \
+			    MAT_FLAG_UNIFORM_SCALE | \
+			    MAT_FLAG_GENERAL_SCALE | \
+			    MAT_FLAG_GENERAL_3D | \
+			    MAT_FLAG_PERSPECTIVE)
+
+#define MAT_DIRTY_ALL_OVER (MAT_DIRTY_TYPE | \
+			    MAT_DIRTY_DEPENDENTS | \
+			    MAT_DIRTY_FLAGS | \
+			    MAT_DIRTY_INVERSE)
+
+#define TEST_MAT_FLAGS(mat, a)  ((MAT_FLAGS_GEOMETRY&(~(a))&((mat)->flags))==0)
+
+
+
+
 typedef struct {
-   GLfloat *m;			/* 16-byte aligned */
-   GLfloat *inv;		/* optional, 16-byte aligned */
+   GLfloat *m;		/* 16-byte aligned */
+   GLfloat *inv;	/* optional, 16-byte aligned */
    GLuint flags;
-   GLuint type;
+   GLuint type;		/* one of the MATRIX_* values */
 } GLmatrix;
 
 
@@ -46,38 +112,38 @@ typedef struct {
 #endif
 
 
-extern void gl_matrix_transposef( GLfloat to[16], const GLfloat from[16] );
-
-extern void gl_matrix_transposed( GLdouble to[16], const GLdouble from[16] );
-
-
-extern void gl_rotation_matrix( GLfloat angle, GLfloat x, GLfloat y, GLfloat z,
-                                GLfloat m[] );
-
+extern void
+gl_matrix_transposef( GLfloat to[16], const GLfloat from[16] );
 
-extern void gl_mat_mul_floats( GLmatrix *mat, const GLfloat *m, GLuint flags );
+extern void
+gl_matrix_transposed( GLdouble to[16], const GLdouble from[16] );
 
-extern void gl_mat_mul_mat( GLmatrix *mat, const GLmatrix *mat2 );
 
-extern void gl_calculate_model_project_matrix( GLcontext *ctx );
+extern void
+gl_rotation_matrix( GLfloat angle, GLfloat x, GLfloat y, GLfloat z,
+                    GLfloat m[] );
 
-extern void gl_matrix_copy( GLmatrix *to, const GLmatrix *from );
 
-extern void gl_matrix_ctr( GLmatrix *m );
+extern void
+gl_calculate_model_project_matrix( GLcontext *ctx );
 
-extern void gl_matrix_dtr( GLmatrix *m );
+extern void
+gl_matrix_ctr( GLmatrix *m );
 
-extern void gl_matrix_alloc_inv( GLmatrix *m );
+extern void
+gl_matrix_dtr( GLmatrix *m );
 
-extern void gl_matrix_mul( GLmatrix *dest, 
-			   const GLmatrix *a, 
-			   const GLmatrix *b );
+extern void
+gl_matrix_alloc_inv( GLmatrix *m );
 
-extern void gl_matrix_analyze( GLmatrix *mat );
+extern void
+gl_matrix_mul( GLmatrix *dest, const GLmatrix *a, const GLmatrix *b );
 
-extern GLboolean gl_matrix_invert( GLmatrix *mat );
+extern void
+gl_matrix_analyze( GLmatrix *mat );
 
-extern void gl_print_matrix( const GLmatrix *m );
+extern void
+gl_print_matrix( const GLmatrix *m );
 
 
 
@@ -155,5 +221,4 @@ extern void
 _mesa_DepthRange( GLclampd nearval, GLclampd farval );
 
 
-
 #endif