On Mon, Mar 19, 2001 at 03:51:10PM -0700, Brian Paul wrote:
> Ove Kaaven wrote:
> >
> > I finally got around to testing the Half-Life problems with gl_ztrick
> > again... I used the following patch, and then gl_ztrick 1 worked:
> >
> > Index: extras/Mesa/src/matrix.c
> > ===================================================================
> > RCS file: /cvsroot/dri/xc/xc/extras/Mesa/src/matrix.c,v
> > retrieving revision 1.12
> > diff -u -r1.12 matrix.c
> > --- extras/Mesa/src/matrix.c 2000/11/09 02:55:12 1.12
> > +++ extras/Mesa/src/matrix.c 2001/03/19 22:28:01
> > @@ -1451,6 +1451,7 @@
> > void
> > gl_Viewport( GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height )
> > {
> > + GLfloat n, f;
> > ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glViewport");
> >
> > if (width<0 || height<0) {
> > @@ -1465,6 +1466,10 @@
> > width = CLAMP( width, 1, MAX_WIDTH );
> > height = CLAMP( height, 1, MAX_HEIGHT );
> >
> > + /* Get depth range */
> > + n = ctx->Viewport.Near;
> > + f = ctx->Viewport.Far;
> > +
> > /* Save viewport */
> > ctx->Viewport.X = x;
> > ctx->Viewport.Width = width;
> > @@ -1476,8 +1481,8 @@
> > ctx->Viewport.WindowMap.m[MAT_TX] = ctx->Viewport.WindowMap.m[MAT_SX] + x;
> > ctx->Viewport.WindowMap.m[MAT_SY] = (GLfloat) height / 2.0F;
> > ctx->Viewport.WindowMap.m[MAT_TY] = ctx->Viewport.WindowMap.m[MAT_SY] + y;
> > - ctx->Viewport.WindowMap.m[MAT_SZ] = 0.5 * ctx->Visual->DepthMaxF;
> > - ctx->Viewport.WindowMap.m[MAT_TZ] = 0.5 * ctx->Visual->DepthMaxF;
> > + ctx->Viewport.WindowMap.m[MAT_SZ] = ctx->Visual->DepthMaxF * ((f - n) / 2.0);
> > + ctx->Viewport.WindowMap.m[MAT_TZ] = ctx->Visual->DepthMaxF * ((f - n) / 2.0 +
>n);
> >
> > ctx->Viewport.WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
> > ctx->Viewport.WindowMap.type = MATRIX_3D_NO_ROT;
>
>
> Great! I'll apply the patch to the DRI and Mesa trees.
Did this patch ever make in to the cvs? I still have this problem on my
V3.
Regards
Lars Munch
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