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| author | Keith Whitwell <keithw@vmware.com> | 2009-01-19 10:15:04 +0000 |
|---|---|---|
| committer | Keith Whitwell <keithw@vmware.com> | 2009-01-19 10:15:04 +0000 |
| commit | b5db6b039c34117be4e441a2b95abbf97df928c3 (patch) | |
| tree | 8efb8698304b70f67cc408e8d12b93ae01a13015 /src/mesa/math/m_matrix.h | |
| parent | 8f3fac6107460b6d9b011b5c76246468bb16004b (diff) | |
| parent | 76753e30781e88912c0465642616ab16bbc1b4f3 (diff) | |
Merge commit 'origin/gallium-0.2' into gallium-xlib-rework
Diffstat (limited to 'src/mesa/math/m_matrix.h')
| -rw-r--r-- | src/mesa/math/m_matrix.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mesa/math/m_matrix.h b/src/mesa/math/m_matrix.h index e8303f3ac5..a8d9000e89 100644 --- a/src/mesa/math/m_matrix.h +++ b/src/mesa/math/m_matrix.h @@ -189,6 +189,18 @@ do { \ } while (0) +/** + * Transform a direction by a matrix. + */ +#define TRANSFORM_DIRECTION( TO, DIR, MAT ) \ +do { \ + TO[0] = DIR[0] * MAT[0] + DIR[1] * MAT[4] + DIR[2] * MAT[8]; \ + TO[1] = DIR[0] * MAT[1] + DIR[1] * MAT[5] + DIR[2] * MAT[9]; \ + TO[2] = DIR[0] * MAT[2] + DIR[1] * MAT[6] + DIR[2] * MAT[10];\ +} while (0) + + + /*@}*/ |