public void glMultMatrixf(float[] m, int m_offset) {
if (matrixMode == GL_MODELVIEW) {
FloatUtil.multMatrixf(matrixMv, m, m_offset, matrixMv);
modified |= DIRTY_MODELVIEW;
} else if (matrixMode == GL_PROJECTION) {
FloatUtil.multMatrixf(matrixP, m, m_offset, matrixP);
modified |= DIRTY_PROJECTION;
} else if (matrixMode == GL.GL_TEXTURE) {
FloatUtil.multMatrixf(matrixTex, m, m_offset, matrixTex);
modified |= DIRTY_TEXTURE;
}
}
public final void glMultMatrixf(final FloatBuffer m) {
if (matrixMode == GL_MODELVIEW) {
FloatUtil.multMatrixf(matrixMv, m, matrixMv);
modified |= DIRTY_MODELVIEW;
} else if (matrixMode == GL_PROJECTION) {
FloatUtil.multMatrixf(matrixP, m, matrixP);
modified |= DIRTY_PROJECTION;
} else if (matrixMode == GL.GL_TEXTURE) {
FloatUtil.multMatrixf(matrixTex, m, matrixTex);
modified |= DIRTY_TEXTURE;
}
}
public final void glRotatef(final float angdeg, float x, float y, float z) {
final float angrad = angdeg * (float) Math.PI / 180.0f;
final float c = (float) Math.cos(angrad);
final float ic = 1.0f - c;
final float s = (float) Math.sin(angrad);
vec3f[0] = x;
vec3f[1] = y;
vec3f[2] = z;
FloatUtil.normalize(vec3f);
x = vec3f[0];
y = vec3f[1];
z = vec3f[2];
// Rotation matrix:
// xx(1-c)+c xy(1-c)+zs xz(1-c)-ys 0
// xy(1-c)-zs yy(1-c)+c yz(1-c)+xs 0
// xz(1-c)+ys yz(1-c)-xs zz(1-c)+c 0
// 0 0 0 1
final float xy = x * y;
final float xz = x * z;
final float xs = x * s;
final float ys = y * s;
final float yz = y * z;
final float zs = z * s;
matrixRot[0 * 4 + 0] = x * x * ic + c;
matrixRot[0 * 4 + 1] = xy * ic + zs;
matrixRot[0 * 4 + 2] = xz * ic - ys;
matrixRot[1 * 4 + 0] = xy * ic - zs;
matrixRot[1 * 4 + 1] = y * y * ic + c;
matrixRot[1 * 4 + 2] = yz * ic + xs;
matrixRot[2 * 4 + 0] = xz * ic + ys;
matrixRot[2 * 4 + 1] = yz * ic - xs;
matrixRot[2 * 4 + 2] = z * z * ic + c;
glMultMatrixf(matrixRot, 0);
}
/**
* Creates an instance of PMVMatrix.
*
* @param useBackingArray <code>true</code> for non direct NIO Buffers with guaranteed backing
* array, which allows faster access in Java computation.
* <p><code>false</code> for direct NIO buffers w/o a guaranteed backing array. In most Java
* implementations, direct NIO buffers have no backing array and hence the Java computation
* will be throttled down by direct IO get/put operations.
* <p>Depending on the application, ie. whether the Java computation or JNI invocation and
* hence native data transfer part is heavier, this flag shall be set to <code>true</code> or
* <code>false</code>.
*/
public PMVMatrix(boolean useBackingArray) {
this.usesBackingArray = useBackingArray;
// I Identity
// T Texture
// P Projection
// Mv ModelView
// Mvi Modelview-Inverse
// Mvit Modelview-Inverse-Transpose
if (useBackingArray) {
matrixBufferArray = new float[6 * 16 + ProjectFloat.getRequiredFloatBufferSize()];
matrixBuffer = null;
} else {
matrixBufferArray = null;
matrixBuffer =
Buffers.newDirectByteBuffer(
(6 * 16 + ProjectFloat.getRequiredFloatBufferSize()) * Buffers.SIZEOF_FLOAT);
matrixBuffer.mark();
}
matrixIdent = Buffers.slice2Float(matrixBuffer, matrixBufferArray, 0 * 16, 1 * 16); // I
matrixTex = Buffers.slice2Float(matrixBuffer, matrixBufferArray, 1 * 16, 1 * 16); // T
matrixPMvMvit =
Buffers.slice2Float(
matrixBuffer,
matrixBufferArray,
2 * 16,
4 * 16); // P + Mv + Mvi + Mvit
matrixPMvMvi =
Buffers.slice2Float(
matrixBuffer, matrixBufferArray, 2 * 16, 3 * 16); // P + Mv + Mvi
matrixPMv =
Buffers.slice2Float(matrixBuffer, matrixBufferArray, 2 * 16, 2 * 16); // P + Mv
matrixP = Buffers.slice2Float(matrixBuffer, matrixBufferArray, 2 * 16, 1 * 16); // P
matrixMv =
Buffers.slice2Float(matrixBuffer, matrixBufferArray, 3 * 16, 1 * 16); // Mv
matrixMvi =
Buffers.slice2Float(
matrixBuffer, matrixBufferArray, 4 * 16, 1 * 16); // Mvi
matrixMvit =
Buffers.slice2Float(
matrixBuffer, matrixBufferArray, 5 * 16, 1 * 16); // Mvit
projectFloat = new ProjectFloat(matrixBuffer, matrixBufferArray, 6 * 16);
if (null != matrixBuffer) {
matrixBuffer.reset();
}
FloatUtil.makeIdentityf(matrixIdent);
vec3f = new float[3];
matrixMult = new float[16];
matrixTrans = new float[16];
matrixRot = new float[16];
matrixScale = new float[16];
matrixOrtho = new float[16];
matrixFrustum = new float[16];
FloatUtil.makeIdentityf(matrixTrans, 0);
FloatUtil.makeIdentityf(matrixRot, 0);
FloatUtil.makeIdentityf(matrixScale, 0);
FloatUtil.makeIdentityf(matrixOrtho, 0);
FloatUtil.makeZero(matrixFrustum, 0);
matrixPStack = new ArrayList<float[]>();
matrixMvStack = new ArrayList<float[]>();
// default values and mode
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL.GL_TEXTURE);
glLoadIdentity();
setDirty();
update();
}