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Microoptimization opportunities found #7

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Microoptimization opportunities found #7

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c0b690a
Merge pull request #3 from watabou/1.9.1
watabou Sep 30, 2015
630ccfd
Micro-optimization opportunities found
andresilva1997 Jun 2, 2021
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72 changes: 39 additions & 33 deletions com/watabou/glwrap/Matrix.java
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Original file line number Diff line number Diff line change
Expand Up @@ -20,40 +20,46 @@
public class Matrix {

public static final float G2RAD = 0.01745329251994329576923690768489f;
public static float[] clone( float[] m ) {

public static float[] clone(float[] m) {

int n = m.length;
float[] res = new float[n];
do {
res[--n] = m[n];
} while (n > 0);

return res;
}
public static void copy( float[] src, float[] dst ) {

public static void copy(float[] src, float[] dst) {

int n = src.length;
do {
dst[--n] = src[n];
} while (n > 0);

}

public static void setIdentity( float[] m ) {
for (int i=0 ; i < 16 ; i++) {
m[i] = 0f;
}
for (int i = 0; i < 16; i += 5) {

public static void setIdentity(float[] m) {
for (int i = 0; i < 15; i += 5) {

m[i] = 1f;

m[i + 1] = 0f;
m[i + 2] = 0f;
m[i + 3] = 0f;
m[i + 4] = 0f;

}

m[15] = 1f;
}

public static void rotate( float[] m, float a ) {
public static void rotate(float[] m, float a) {
a *= G2RAD;
float sin = (float)Math.sin( a );
float cos = (float)Math.cos( a );
float sin = (float) Math.sin(a);
float cos = (float) Math.cos(a);
float m0 = m[0];
float m1 = m[1];
float m4 = m[4];
Expand All @@ -62,21 +68,21 @@ public static void rotate( float[] m, float a ) {
m[1] = m1 * cos + m5 * sin;
m[4] = -m0 * sin + m4 * cos;
m[5] = -m1 * sin + m5 * cos;
}
public static void skewX( float[] m, float a ) {
double t = Math.tan( a * G2RAD );
}

public static void skewX(float[] m, float a) {
double t = Math.tan(a * G2RAD);
m[4] += -m[0] * t;
m[5] += -m[1] * t;
}
public static void skewY( float[] m, float a ) {
double t = Math.tan( a * G2RAD );
}

public static void skewY(float[] m, float a) {
double t = Math.tan(a * G2RAD);
m[0] += m[4] * t;
m[1] += m[5] * t;
}
public static void scale( float[] m, float x, float y ) {
}

public static void scale(float[] m, float x, float y) {
m[0] *= x;
m[1] *= x;
m[2] *= x;
Expand All @@ -85,15 +91,15 @@ public static void scale( float[] m, float x, float y ) {
m[5] *= y;
m[6] *= y;
m[7] *= y;
// android.opengl.Matrix.scaleM( m, 0, x, y, 1 );
// android.opengl.Matrix.scaleM( m, 0, x, y, 1 );
}
public static void translate( float[] m, float x, float y ) {

public static void translate(float[] m, float x, float y) {
m[12] += m[0] * x + m[4] * y;
m[13] += m[1] * x + m[5] * y;
}
public static void multiply( float[] left, float right[], float[] result ) {
android.opengl.Matrix.multiplyMM( result, 0, left, 0, right, 0 );

public static void multiply(float[] left, float right[], float[] result) {
android.opengl.Matrix.multiplyMM(result, 0, left, 0, right, 0);
}
}
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