diff options
author | Sven Gothel <[email protected]> | 2013-06-09 08:45:08 +0200 |
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committer | Sven Gothel <[email protected]> | 2013-06-09 08:45:08 +0200 |
commit | 81a4f175e3065ea281139d08cc79bcdfb4912ee7 (patch) | |
tree | 4b8250b1389b29d439afd15c5f9e13ff97aee91d /src/jogl/classes/com/jogamp/opengl | |
parent | e2b443a61cc9dd3efcaf685163ef9290638bf18e (diff) |
FloatUtil: Add in-place multMatrixf (since we mult line by line, we can multiply in place). Will be used by PMVMatrix.
Diffstat (limited to 'src/jogl/classes/com/jogamp/opengl')
-rw-r--r-- | src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java b/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java index 9a51c32b3..f3f44f15a 100644 --- a/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java +++ b/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java @@ -113,6 +113,22 @@ public class FloatUtil { } /** + * @param a 4x4 matrix in column-major order (also result) + * @param b 4x4 matrix in column-major order + */ + public static final void multMatrixf(final float[] a, int a_off, final float[] b, int b_off) { + for (int i = 0; i < 4; i++) { + // one row in column-major order + final int a_off_i = a_off+i; + final float ai0=a[a_off_i+0*4], ai1=a[a_off_i+1*4], ai2=a[a_off_i+2*4], ai3=a[a_off_i+3*4]; // row-i of a + a[a_off_i+0*4] = ai0 * b[b_off+0+0*4] + ai1 * b[b_off+1+0*4] + ai2 * b[b_off+2+0*4] + ai3 * b[b_off+3+0*4] ; + a[a_off_i+1*4] = ai0 * b[b_off+0+1*4] + ai1 * b[b_off+1+1*4] + ai2 * b[b_off+2+1*4] + ai3 * b[b_off+3+1*4] ; + a[a_off_i+2*4] = ai0 * b[b_off+0+2*4] + ai1 * b[b_off+1+2*4] + ai2 * b[b_off+2+2*4] + ai3 * b[b_off+3+2*4] ; + a[a_off_i+3*4] = ai0 * b[b_off+0+3*4] + ai1 * b[b_off+1+3*4] + ai2 * b[b_off+2+3*4] + ai3 * b[b_off+3+3*4] ; + } + } + + /** * @param a 4x4 matrix in column-major order * @param b 4x4 matrix in column-major order * @param d result a*b in column-major order @@ -146,6 +162,23 @@ public class FloatUtil { d.put(dP+i+3*4 , ai0 * b[b_off+0+3*4] + ai1 * b[b_off+1+3*4] + ai2 * b[b_off+2+3*4] + ai3 * b[b_off+3+3*4] ); } } + + /** + * @param a 4x4 matrix in column-major order (also result) + * @param b 4x4 matrix in column-major order + */ + public static final void multMatrixf(final FloatBuffer a, final float[] b, int b_off) { + final int aP = a.position(); + for (int i = 0; i < 4; i++) { + // one row in column-major order + final int aP_i = aP+i; + final float ai0=a.get(aP_i+0*4), ai1=a.get(aP_i+1*4), ai2=a.get(aP_i+2*4), ai3=a.get(aP_i+3*4); // row-i of a + a.put(aP_i+0*4 , ai0 * b[b_off+0+0*4] + ai1 * b[b_off+1+0*4] + ai2 * b[b_off+2+0*4] + ai3 * b[b_off+3+0*4] ); + a.put(aP_i+1*4 , ai0 * b[b_off+0+1*4] + ai1 * b[b_off+1+1*4] + ai2 * b[b_off+2+1*4] + ai3 * b[b_off+3+1*4] ); + a.put(aP_i+2*4 , ai0 * b[b_off+0+2*4] + ai1 * b[b_off+1+2*4] + ai2 * b[b_off+2+2*4] + ai3 * b[b_off+3+2*4] ); + a.put(aP_i+3*4 , ai0 * b[b_off+0+3*4] + ai1 * b[b_off+1+3*4] + ai2 * b[b_off+2+3*4] + ai3 * b[b_off+3+3*4] ); + } + } /** * @param a 4x4 matrix in column-major order @@ -167,6 +200,24 @@ public class FloatUtil { } /** + * @param a 4x4 matrix in column-major order (also result) + * @param b 4x4 matrix in column-major order + */ + public static final void multMatrixf(final FloatBuffer a, final FloatBuffer b) { + final int aP = a.position(); + final int bP = b.position(); + for (int i = 0; i < 4; i++) { + // one row in column-major order + final int aP_i = aP+i; + final float ai0=a.get(aP_i+0*4), ai1=a.get(aP_i+1*4), ai2=a.get(aP_i+2*4), ai3=a.get(aP_i+3*4); // row-i of a + a.put(aP_i+0*4 , ai0 * b.get(bP+0+0*4) + ai1 * b.get(bP+1+0*4) + ai2 * b.get(bP+2+0*4) + ai3 * b.get(bP+3+0*4) ); + a.put(aP_i+1*4 , ai0 * b.get(bP+0+1*4) + ai1 * b.get(bP+1+1*4) + ai2 * b.get(bP+2+1*4) + ai3 * b.get(bP+3+1*4) ); + a.put(aP_i+2*4 , ai0 * b.get(bP+0+2*4) + ai1 * b.get(bP+1+2*4) + ai2 * b.get(bP+2+2*4) + ai3 * b.get(bP+3+2*4) ); + a.put(aP_i+3*4 , ai0 * b.get(bP+0+3*4) + ai1 * b.get(bP+1+3*4) + ai2 * b.get(bP+2+3*4) + ai3 * b.get(bP+3+3*4) ); + } + } + + /** * @param a 4x4 matrix in column-major order * @param b 4x4 matrix in column-major order * @param d result a*b in column-major order |