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st/nine: Always normalize hitDir 

Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Axel Davy <axel.davy@ens.fr>
This commit is contained in:
Patrick Rudolph 2015-09-22 14:30:35 +02:00 committed by Axel Davy
parent ed7e1046b6
commit cc830dc214
1 changed files with 3 additions and 2 deletions
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5
src/gallium/state_trackers/nine/nine_ff.c
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@ -747,12 +747,10 @@ nine_ff_build_vs(struct NineDevice9 *device, struct vs_build_ctx *vs)
{
/* hitDir = light.position - eyeVtx
* d = length(hitDir)
* hitDir /= d
*/
ureg_SUB(ureg, rHit, cLPos, ureg_src(rVtx));
ureg_DP3(ureg, tmp_x, ureg_src(rHit), ureg_src(rHit));
ureg_RSQ(ureg, tmp_y, _X(tmp));
ureg_MUL(ureg, rHit, ureg_src(rHit), _Y(tmp)); /* normalize */
ureg_MUL(ureg, tmp_x, _X(tmp), _Y(tmp)); /* length */
/* att = 1.0 / (light.att0 + (light.att1 + light.att2 * d) * d) */
@ -766,6 +764,9 @@ nine_ff_build_vs(struct NineDevice9 *device, struct vs_build_ctx *vs)
ureg_fixup_label(ureg, label[l-1], ureg_get_instruction_number(ureg));
ureg_ENDIF(ureg);
/* normalize hitDir */
ureg_normalize3(ureg, rHit, ureg_src(rHit), tmp);
/* if (SPOT light) */
ureg_SEQ(ureg, tmp_x, cLKind, ureg_imm1f(ureg, D3DLIGHT_SPOT));
ureg_IF(ureg, _X(tmp), &label[l++]);