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Andrey Antukh
2022-01-12 20:25:32 +01:00
parent a72da38f6d
commit 0f68210a16
5 changed files with 428 additions and 0 deletions
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backend/dev/java/app/Experiments.java Normal file
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package app;
import clojure.lang.Seqable;
import clojure.lang.RT;
import clojure.lang.ISeq;
import clojure.lang.ILookup;
import clojure.lang.Keyword;
// static public double[] multiply(final double[] m1, final double m2[]) {
// var result = new double[6];
// result[0] = (m1[0] * m2[0]) + (m1[2] * m2[1]);
// result[1] = (m1[1] * m2[0]) + (m1[3] * m2[1]);
// result[2] = (m1[0] * m2[2]) + (m1[2] * m2[3]);
// result[3] = (m1[1] * m2[2]) + (m1[3] * m2[3]);o
// result[4] = (m1[0] * m2[4]) + (m1[2] * m2[5]) + m1[4];
// result[5] = (m1[1] * m2[4]) + (m1[3] * m2[5]) + m1[5];
// return result;
// }
public class Experiments {
static public class Matrix implements Seqable, ILookup {
public final double[] buff;
public Matrix(double a, double b, double c, double d, double e, double f) {
buff = new double[6];
buff[0] = a;
buff[1] = b;
buff[2] = c;
buff[3] = d;
buff[4] = e;
buff[5] = f;
}
public Matrix(final double [] otherBuffer) {
buff = otherBuffer;
}
public ISeq seq() {
return RT.seq(this.buff);
}
public Double valAt(final Object key) {
var name = ((Keyword) key).getName();
switch(name) {
case "a": return this.buff[0];
case "b": return this.buff[1];
case "c": return this.buff[2];
case "d": return this.buff[3];
case "e": return this.buff[4];
default: return this.buff[5];
}
}
public Double valAt(final Object key, Object notFound) {
throw new IllegalArgumentException("not supported");
}
}
static public Matrix create(double a, double b, double c, double d, double e, double f) {
var buff = new double[6];
buff[0] = a;
buff[1] = b;
buff[2] = c;
buff[3] = d;
buff[4] = e;
buff[5] = f;
return new Matrix(buff);
}
static public Matrix multiply(final Matrix mt1, final Matrix mt2) {
var result = new double[6];
var m1 = mt1.buff;
var m2 = mt1.buff;
result[0] = (m1[0] * m2[0]) + (m1[2] * m2[1]);
result[1] = (m1[1] * m2[0]) + (m1[3] * m2[1]);
result[2] = (m1[0] * m2[2]) + (m1[2] * m2[3]);
result[3] = (m1[1] * m2[2]) + (m1[3] * m2[3]);
result[4] = (m1[0] * m2[4]) + (m1[2] * m2[5]) + m1[4];
result[5] = (m1[1] * m2[4]) + (m1[3] * m2[5]) + m1[5];
return new Matrix(result);
}
static private void multiplyMutating(final double[] m1, final double[] m2) {
var m1a = m1[0];
var m1b = m1[1];
var m1c = m1[2];
var m1d = m1[3];
var m1e = m1[4];
var m1f = m1[5];
double[] result = m1;
result[0] = (m1a * m2[0]) + (m1c * m2[1]);
result[1] = (m1b * m2[0]) + (m1d * m2[1]);
result[2] = (m1a * m2[2]) + (m1c * m2[3]);
result[3] = (m1b * m2[2]) + (m1d * m2[3]);
result[4] = (m1a * m2[4]) + (m1c * m2[5]) + m1e;
result[5] = (m1b * m2[4]) + (m1d * m2[5]) + m1f;
}
static public Matrix multiplyBulk(final Matrix m1) {
return m1;
}
static public Matrix multiplyBulk(final Matrix m1, final Matrix m2) {
return multiply(m1, m2);
}
static public Matrix multiplyBulk(final Matrix m1, final Matrix m2, final Matrix m3) {
var result = multiply(m1, m2);
multiplyMutating(result.buff, m3.buff);
return result;
}
static public Matrix multiplyBulk(final Matrix m1, final Matrix m2, final Matrix m3, final Matrix m4) {
var result = multiply(m1, m2);
multiplyMutating(result.buff, m3.buff);
multiplyMutating(result.buff, m4.buff);
return result;
};
static public Matrix multiplyBulk(final Matrix m1, final Matrix m2, final Matrix m3, final Matrix m4, final Matrix m5) {
var result = multiply(m1, m2);
multiplyMutating(result.buff, m3.buff);
multiplyMutating(result.buff, m4.buff);
multiplyMutating(result.buff, m5.buff);
return result;
}
}