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-rw-r--r--src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java162
-rw-r--r--src/jogl/classes/com/jogamp/opengl/util/PMVMatrix.java81
-rw-r--r--src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java17
-rw-r--r--src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java3
4 files changed, 181 insertions, 82 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java b/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java
index 9d3ee412b..cf56ff0a4 100644
--- a/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/math/FloatUtil.java
@@ -29,6 +29,8 @@ package com.jogamp.opengl.math;
import java.nio.FloatBuffer;
+import javax.media.opengl.GLException;
+
import jogamp.opengl.Debug;
import com.jogamp.common.os.Platform;
@@ -199,6 +201,123 @@ public class FloatUtil {
}
/**
+ * Make given matrix the orthogonal matrix based on given parameters.
+ *
+ * @param a 4x4 matrix in column-major order (also result)
+ * @param a_off
+ * @param initA if true, given matrix will be initialized w/ identity matrix.
+ * @param left
+ * @param right
+ * @param bottom
+ * @param top
+ * @param zNear
+ * @param zFar
+ * @return given matrix for chaining
+ */
+ public static final float[] makeOrthof(final float[] a, final int a_off, final boolean initA,
+ final float left, final float right,
+ final float bottom, final float top,
+ final float zNear, final float zFar) {
+ if( initA ) {
+ FloatUtil.makeIdentityf(a, a_off);
+ }
+ // Ortho matrix (Column Order):
+ // 2/dx 0 0 0
+ // 0 2/dy 0 0
+ // 0 0 2/dz 0
+ // tx ty tz 1
+ final float dx=right-left;
+ final float dy=top-bottom;
+ final float dz=zFar-zNear;
+ final float tx=-1.0f*(right+left)/dx;
+ final float ty=-1.0f*(top+bottom)/dy;
+ final float tz=-1.0f*(zFar+zNear)/dz;
+
+ a[a_off+0+4*0] = 2.0f/dx;
+ a[a_off+1+4*1] = 2.0f/dy;
+ a[a_off+2+4*2] = -2.0f/dz;
+ a[a_off+0+4*3] = tx;
+ a[a_off+1+4*3] = ty;
+ a[a_off+2+4*3] = tz;
+
+ return a;
+ }
+
+ /**
+ * Make given matrix the frustum matrix based on given parameters.
+ *
+ * @param a 4x4 matrix in column-major order (also result)
+ * @param a_off
+ * @param initA if true, given matrix will be initialized w/ identity matrix.
+ * @param left
+ * @param right
+ * @param bottom
+ * @param top
+ * @param zNear
+ * @param zFar
+ * @return given matrix for chaining
+ */
+ public static final float[] makeFrustumf(final float[] a, final int a_off, final boolean initA,
+ final float left, final float right,
+ final float bottom, final float top,
+ final float zNear, final float zFar) {
+ if(zNear<=0.0f||zFar<0.0f) {
+ throw new GLException("GL_INVALID_VALUE: zNear and zFar must be positive, and zNear>0");
+ }
+ if(left==right || top==bottom) {
+ throw new GLException("GL_INVALID_VALUE: top,bottom and left,right must not be equal");
+ }
+ if( initA ) {
+ FloatUtil.makeIdentityf(a, a_off);
+ }
+ // Frustum matrix (Column Order):
+ // 2*zNear/dx 0 0 0
+ // 0 2*zNear/dy 0 0
+ // A B C -1
+ // 0 0 D 0
+ final float zNear2 = 2.0f*zNear;
+ final float dx=right-left;
+ final float dy=top-bottom;
+ final float dz=zFar-zNear;
+ final float A=(right+left)/dx;
+ final float B=(top+bottom)/dy;
+ final float C=-1.0f*(zFar+zNear)/dz;
+ final float D=-2.0f*(zFar*zNear)/dz;
+
+ a[a_off+0+4*0] = zNear2/dx;
+ a[a_off+1+4*1] = zNear2/dy;
+ a[a_off+2+4*2] = C;
+
+ a[a_off+0+4*2] = A;
+ a[a_off+1+4*2] = B;
+
+ a[a_off+2+4*3] = D;
+ a[a_off+3+4*2] = -1.0f;
+ return a;
+ }
+
+ /**
+ * Make given matrix the perspective matrix based on given parameters.
+ *
+ * @param a 4x4 matrix in column-major order (also result)
+ * @param a_off
+ * @param initA if true, given matrix will be initialized w/ identity matrix.
+ * @param fovy angle in radians
+ * @param aspect
+ * @param zNear
+ * @param zFar
+ * @return given matrix for chaining
+ */
+ public static final float[] makePerspective(final float[] a, final int a_off, final boolean initA,
+ final float fovy, final float aspect, final float zNear, final float zFar) {
+ float top=(float)Math.tan(fovy)*zNear;
+ float bottom=-1.0f*top;
+ float left=aspect*bottom;
+ float right=aspect*top;
+ return makeFrustumf(a, a_off, initA, left, right, bottom, top, zNear, zFar);
+ }
+
+ /**
* Multiply matrix: [d] = [a] x [b]
* @param a 4x4 matrix in column-major order
* @param b 4x4 matrix in column-major order
@@ -840,4 +959,47 @@ public class FloatUtil {
public static float sqrt(final float a) { return (float) java.lang.Math.sqrt(a); }
+ /**
+ * Returns resolution of Z buffer of given parameter,
+ * see <a href="http://www.sjbaker.org/steve/omniv/love_your_z_buffer.html">Love Your Z-Buffer</a>.
+ * <pre>
+ * return z * z / ( zNear * (1&lt;&lt;zBits) - z )
+ * </pre>
+ * @param zBits number of bits of Z precision, i.e. z-buffer depth
+ * @param z distance from the eye to the object
+ * @param zNear distance from eye to near clip plane
+ * @return smallest resolvable Z separation at this range.
+ */
+ public static float getZBufferEpsilon(final int zBits, final float z, final float zNear) {
+ return z * z / ( zNear * ( 1 << zBits ) - z );
+ }
+
+ /**
+ * Returns Z buffer value of given parameter,
+ * see <a href="http://www.sjbaker.org/steve/omniv/love_your_z_buffer.html">Love Your Z-Buffer</a>.
+ * <pre>
+ * float a = zFar / ( zFar - zNear )
+ * float b = zFar * zNear / ( zNear - zFar )
+ * return (int) ( (1&lt;&lt;zBits) * ( a + b / z ) )
+ * </pre>
+ * @param zBits number of bits of Z precision, i.e. z-buffer depth
+ * @param z distance from the eye to the object
+ * @param zNear distance from eye to near clip plane
+ * @param zFar distance from eye to far clip plane
+ * @return z buffer value
+ */
+ public static int getZBufferValue(final int zBits, final float z, final float zNear, final float zFar) {
+ final float a = zFar / ( zFar - zNear );
+ final float b = zFar * zNear / ( zNear - zFar );
+ return (int) ( (1<<zBits) * ( a + b / z ) );
+ }
+
+ /**
+ * Returns orthogonal distance
+ * (1f/zNear-1f/orthoDist)/(1f/zNear-1f/zFar);
+ */
+ public static float getOrthoWinZ(final float orthoZ, final float zNear, final float zFar) {
+ return (1f/zNear-1f/orthoZ)/(1f/zNear-1f/zFar);
+ }
+
} \ No newline at end of file
diff --git a/src/jogl/classes/com/jogamp/opengl/util/PMVMatrix.java b/src/jogl/classes/com/jogamp/opengl/util/PMVMatrix.java
index 44288256a..8f5beeebe 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/PMVMatrix.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/PMVMatrix.java
@@ -686,61 +686,12 @@ public class PMVMatrix implements GLMatrixFunc {
@Override
public final void glOrthof(final float left, final float right, final float bottom, final float top, final float zNear, final float zFar) {
- // Ortho matrix (Column Order):
- // 2/dx 0 0 0
- // 0 2/dy 0 0
- // 0 0 2/dz 0
- // tx ty tz 1
- final float dx=right-left;
- final float dy=top-bottom;
- final float dz=zFar-zNear;
- final float tx=-1.0f*(right+left)/dx;
- final float ty=-1.0f*(top+bottom)/dy;
- final float tz=-1.0f*(zFar+zNear)/dz;
-
- matrixOrtho[0+4*0] = 2.0f/dx;
- matrixOrtho[1+4*1] = 2.0f/dy;
- matrixOrtho[2+4*2] = -2.0f/dz;
- matrixOrtho[0+4*3] = tx;
- matrixOrtho[1+4*3] = ty;
- matrixOrtho[2+4*3] = tz;
-
- glMultMatrixf(matrixOrtho, 0);
+ glMultMatrixf( FloatUtil.makeOrthof(matrixOrtho, 0, false, left, right, bottom, top, zNear, zFar), 0 );
}
@Override
public final void glFrustumf(final float left, final float right, final float bottom, final float top, final float zNear, final float zFar) {
- if(zNear<=0.0f||zFar<0.0f) {
- throw new GLException("GL_INVALID_VALUE: zNear and zFar must be positive, and zNear>0");
- }
- if(left==right || top==bottom) {
- throw new GLException("GL_INVALID_VALUE: top,bottom and left,right must not be equal");
- }
- // Frustum matrix (Column Order):
- // 2*zNear/dx 0 0 0
- // 0 2*zNear/dy 0 0
- // A B C -1
- // 0 0 D 0
- final float zNear2 = 2.0f*zNear;
- final float dx=right-left;
- final float dy=top-bottom;
- final float dz=zFar-zNear;
- final float A=(right+left)/dx;
- final float B=(top+bottom)/dy;
- final float C=-1.0f*(zFar+zNear)/dz;
- final float D=-2.0f*(zFar*zNear)/dz;
-
- matrixFrustum[0+4*0] = zNear2/dx;
- matrixFrustum[1+4*1] = zNear2/dy;
- matrixFrustum[2+4*2] = C;
-
- matrixFrustum[0+4*2] = A;
- matrixFrustum[1+4*2] = B;
-
- matrixFrustum[2+4*3] = D;
- matrixFrustum[3+4*2] = -1.0f;
-
- glMultMatrixf(matrixFrustum, 0);
+ glMultMatrixf( FloatUtil.makeFrustumf(matrixFrustum, 0, false, left, right, bottom, top, zNear, zFar), 0 );
}
//
@@ -751,11 +702,7 @@ public class PMVMatrix implements GLMatrixFunc {
* {@link #glMultMatrixf(FloatBuffer) Multiply} the {@link #glGetMatrixMode() current matrix} with the perspective/frustum matrix.
*/
public final void gluPerspective(final float fovy, final float aspect, final float zNear, final float zFar) {
- float top=(float)Math.tan(fovy*((float)Math.PI)/360.0f)*zNear;
- float bottom=-1.0f*top;
- float left=aspect*bottom;
- float right=aspect*top;
- glFrustumf(left, right, bottom, top, zNear, zFar);
+ glMultMatrixf( FloatUtil.makePerspective(matrixFrustum, 0, false, fovy*((float)Math.PI)/360.0f, aspect, zNear, zFar), 0 );
}
/**
@@ -840,24 +787,12 @@ public class PMVMatrix implements GLMatrixFunc {
* using a {@link AABBox#intersectsRay(Ray, float[]) bounding box}.
* <p>
* Notes for picking <i>winz0</i> and <i>winz1</i>:
+ * <ul>
+ * <li>see {@link FloatUtil#getZBufferEpsilon(int, float, float)}</li>
+ * <li>see {@link FloatUtil#getZBufferValue(int, float, float, float)}</li>
+ * <li>see {@link FloatUtil#getOrthoWinZ(float, float, float)}</li>
+ * </ul>
* </p>
- * <p>
- * <a href="http://www.sjbaker.org/steve/omniv/love_your_z_buffer.html">Love Your Z-Buffer</a>
- * <pre>
- * delta = z * z / ( zNear * (1&lt;&lt;N) - z )
- *
- * Where:
- * N = number of bits of Z precision
- * zNear = distance from eye to near clip plane
- * z = distance from the eye to the object
- * delta = the smallest resolvable Z separation at this range.
- * </pre>
- * Another equation to determine winZ for 'orthoDist' > 0
- * <pre>
- * winZ = (1f/zNear-1f/orthoDist)/(1f/zNear-1f/zFar);
- * </pre>
- * </p>
- *
* @param winx
* @param winy
* @param winz0
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
index b289b41e2..6a4b13dfb 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
@@ -312,17 +312,20 @@ public class ShaderProgram {
gl.glUseProgram( on ? shaderProgram : 0 );
programInUse = on;
}
+ public synchronized void notifyNotInUse() {
+ programInUse = false;
+ }
- protected boolean programLinked = false;
- protected boolean programInUse = false;
- protected int shaderProgram = 0; // non zero is valid!
- protected HashSet<ShaderCode> allShaderCode = new HashSet<ShaderCode>();
- protected HashSet<ShaderCode> attachedShaderCode = new HashSet<ShaderCode>();
- protected int id = -1;
+ private boolean programLinked = false;
+ private boolean programInUse = false;
+ private int shaderProgram = 0; // non zero is valid!
+ private final HashSet<ShaderCode> allShaderCode = new HashSet<ShaderCode>();
+ private final HashSet<ShaderCode> attachedShaderCode = new HashSet<ShaderCode>();
+ private int id = -1;
private static synchronized int getNextID() {
return nextID++;
}
- protected static int nextID = 1;
+ private static int nextID = 1;
}
diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java
index ce4c2615d..64dd589b8 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderState.java
@@ -176,8 +176,7 @@ public class ShaderState {
}
if(shaderProgram.inUse()) {
if(null != prog && enable) {
- // new program will issue glUseProgram(..)
- shaderProgram.programInUse = false;
+ shaderProgram.notifyNotInUse();
} else {
// no new 'enabled' program - disable
useProgram(gl, false);