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Automated import from //branches/master/...@142688,142688

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This commit is contained in:
Jack Palevich
2009-03-25 15:38:48 -07:00
committed by The Android Open Source Project
parent c9a8e0ba6c
commit b2e0cf3553
1 changed files with 78 additions and 73 deletions
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151
opengl/java/android/opengl/GLU.java
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@@ -20,14 +20,14 @@ import javax.microedition.khronos.opengles.GL10;
/**
* A set of GL utilities inspired by the OpenGL Utility Toolkit.
*
*
*/
public class GLU {
/**
* Return an error string from a GL or GLU error code.
*
*
* @param error - a GL or GLU error code.
* @return the error string for the input error code, or NULL if the input
* was not a valid GL or GLU error code.
@@ -56,7 +56,7 @@ public class GLU {
/**
* Define a viewing transformation in terms of an eye point, a center of
* view, and an up vector.
*
*
* @param gl a GL10 interface
* @param eyeX eye point X
* @param eyeY eye point Y
@@ -89,46 +89,48 @@ public class GLU {
float sx = fy * upZ - fz * upY;
float sy = fz * upX - fx * upZ;
float sz = fx * upY - fy * upX;
// and normalize s
float rls = 1.0f / Matrix.length(sx, sy, sz);
sx *= rls;
sy *= rls;
sz *= rls;
// compute u = s x f
float ux = sy * fz - sz * fy;
float uy = sz * fx - sx * fz;
float uz = sx * fy - sy * fx;
float[] m = new float[16];
m[0] = sx;
m[1] = ux;
m[2] = -fx;
m[3] = 0.0f;
float[] scratch = sScratch;
synchronized(scratch) {
scratch[0] = sx;
scratch[1] = ux;
scratch[2] = -fx;
scratch[3] = 0.0f;
m[4] = sy;
m[5] = uy;
m[6] = -fy;
m[7] = 0.0f;
scratch[4] = sy;
scratch[5] = uy;
scratch[6] = -fy;
scratch[7] = 0.0f;
m[8] = sz;
m[9] = uz;
m[10] = -fz;
m[11] = 0.0f;
scratch[8] = sz;
scratch[9] = uz;
scratch[10] = -fz;
scratch[11] = 0.0f;
m[12] = 0.0f;
m[13] = 0.0f;
m[14] = 0.0f;
m[15] = 1.0f;
scratch[12] = 0.0f;
scratch[13] = 0.0f;
scratch[14] = 0.0f;
scratch[15] = 1.0f;
gl.glMultMatrixf(m, 0);
gl.glMultMatrixf(scratch, 0);
}
gl.glTranslatef(-eyeX, -eyeY, -eyeZ);
}
/**
* Set up a 2D orthographic projection matrix
*
*
* @param gl
* @param left
* @param right
@@ -142,7 +144,7 @@ public class GLU {
/**
* Set up a perspective projection matrix
*
*
* @param gl a GL10 interface
* @param fovy specifies the field of view angle, in degrees, in the Y
* direction.
@@ -170,7 +172,7 @@ public class GLU {
* <p>
* Note that you can use the OES_matrix_get extension, if present, to get
* the current modelView and projection matrices.
*
*
* @param objX object coordinates X
* @param objY object coordinates Y
* @param objZ object coordinates Z
@@ -193,35 +195,39 @@ public class GLU {
public static int gluProject(float objX, float objY, float objZ,
float[] model, int modelOffset, float[] project, int projectOffset,
int[] view, int viewOffset, float[] win, int winOffset) {
float[] m = new float[16];
Matrix.multiplyMM(m, 0, project, projectOffset, model, modelOffset);
float[] scratch = sScratch;
synchronized(scratch) {
final int M_OFFSET = 0; // 0..15
final int V_OFFSET = 16; // 16..19
final int V2_OFFSET = 20; // 20..23
Matrix.multiplyMM(scratch, M_OFFSET, project, projectOffset,
model, modelOffset);
float[] v = new float[4];
scratch[V_OFFSET + 0] = objX;
scratch[V_OFFSET + 1] = objY;
scratch[V_OFFSET + 2] = objZ;
scratch[V_OFFSET + 3] = 1.0f;
v[0] = objX;
v[1] = objY;
v[2] = objZ;
v[3] = 1.0f;
Matrix.multiplyMV(scratch, V2_OFFSET,
scratch, M_OFFSET, scratch, V_OFFSET);
float[] v2 = new float[4];
float w = scratch[V2_OFFSET + 3];
if (w == 0.0f) {
return GL10.GL_FALSE;
}
Matrix.multiplyMV(v2, 0, m, 0, v, 0);
float rw = 1.0f / w;
float w = v2[3];
if (w == 0.0f) {
return GL10.GL_FALSE;
win[winOffset] =
view[viewOffset] + view[viewOffset + 2]
* (scratch[V2_OFFSET + 0] * rw + 1.0f)
* 0.5f;
win[winOffset + 1] =
view[viewOffset + 1] + view[viewOffset + 3]
* (scratch[V2_OFFSET + 1] * rw + 1.0f) * 0.5f;
win[winOffset + 2] = (scratch[V2_OFFSET + 2] * rw + 1.0f) * 0.5f;
}
float rw = 1.0f / w;
win[winOffset] =
view[viewOffset] + view[viewOffset + 2] * (v2[0] * rw + 1.0f)
* 0.5f;
win[winOffset + 1] =
view[viewOffset + 1] + view[viewOffset + 3]
* (v2[1] * rw + 1.0f) * 0.5f;
win[winOffset + 2] = (v2[2] * rw + 1.0f) * 0.5f;
return GL10.GL_TRUE;
}
@@ -232,7 +238,7 @@ public class GLU {
* <p>
* Note that you can use the OES_matrix_get extension, if present, to get
* the current modelView and projection matrices.
*
*
* @param winX window coordinates X
* @param winY window coordinates Y
* @param winZ window coordinates Z
@@ -255,34 +261,33 @@ public class GLU {
public static int gluUnProject(float winX, float winY, float winZ,
float[] model, int modelOffset, float[] project, int projectOffset,
int[] view, int viewOffset, float[] obj, int objOffset) {
float[] pm = new float[16];
Matrix.multiplyMM(pm, 0, project, projectOffset, model, modelOffset);
float[] scratch = sScratch;
synchronized(scratch) {
final int PM_OFFSET = 0; // 0..15
final int INVPM_OFFSET = 16; // 16..31
final int V_OFFSET = 0; // 0..3 Reuses PM_OFFSET space
Matrix.multiplyMM(scratch, PM_OFFSET, project, projectOffset,
model, modelOffset);
float[] invPM = new float[16];
if (!Matrix.invertM(invPM, 0, pm, 0)) {
return GL10.GL_FALSE;
if (!Matrix.invertM(scratch, INVPM_OFFSET, scratch, PM_OFFSET)) {
return GL10.GL_FALSE;
}
scratch[V_OFFSET + 0] =
2.0f * (winX - view[viewOffset + 0]) / view[viewOffset + 2]
- 1.0f;
scratch[V_OFFSET + 1] =
2.0f * (winY - view[viewOffset + 1]) / view[viewOffset + 3]
- 1.0f;
scratch[V_OFFSET + 2] = 2.0f * winZ - 1.0f;
scratch[V_OFFSET + 3] = 1.0f;
Matrix.multiplyMV(obj, objOffset, scratch, INVPM_OFFSET,
scratch, V_OFFSET);
}
float[] v = new float[4];
v[0] =
2.0f * (winX - view[viewOffset + 0]) / view[viewOffset + 2]
- 1.0f;
v[1] =
2.0f * (winY - view[viewOffset + 1]) / view[viewOffset + 3]
- 1.0f;
v[2] = 2.0f * winZ - 1.0f;
v[3] = 1.0f;
float[] v2 = new float[4];
Matrix.multiplyMV(v2, 0, invPM, 0, v, 0);
obj[objOffset] = v2[0];
obj[objOffset + 1] = v2[1];
obj[objOffset + 2] = v2[2];
return GL10.GL_TRUE;
}
private static final float[] sScratch = new float[32];
}