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jglm.Mat3 Maven / Gradle / Ivy
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package jglm;
/**
* @deprecated
* @author gbarbieri
*/
public class Mat3 extends Mat {
public Vec3 c0;
public Vec3 c1;
public Vec3 c2;
public Mat3() {
order = 3;
c0 = new Vec3();
c1 = new Vec3();
c2 = new Vec3();
}
public Mat3(float value) {
this();
for (int i = 0; i < order; i++) {
set(i * (order + 1), value);
}
}
public Mat3(Mat4 mat4) {
this();
c0 = new Vec3(mat4.c0.x, mat4.c0.y, mat4.c0.z);
c1 = new Vec3(mat4.c1.x, mat4.c1.y, mat4.c1.z);
c2 = new Vec3(mat4.c2.x, mat4.c2.y, mat4.c2.z);
}
public Mat3(Vec3 v0, Vec3 v1, Vec3 v2) {
this();
c0 = v0;
c1 = v1;
c2 = v2;
}
public Mat3(float[] fs) {
this();
c0 = new Vec3(fs, order * 0);
c1 = new Vec3(fs, order * 1);
c2 = new Vec3(fs, order * 2);
}
public float[] toFloatArray() {
return new float[]{
c0.x, c0.y, c0.z,
c1.x, c1.y, c1.z,
c2.x, c2.y, c2.z};
}
public void setDiagonal(Vec3 vec3) {
c0.x = vec3.x;
c1.y = vec3.y;
c2.z = vec3.z;
}
public static Mat3 rotateX(float fAngDeg) {
float fAngRad = (float) Math.toRadians(fAngDeg);
float fCos = (float) Math.cos(fAngRad);
float fSin = (float) Math.sin(fAngRad);
Mat3 mat3 = new Mat3(1.0f);
mat3.c1.y = fCos;
mat3.c1.z = fSin;
mat3.c2.y = -fSin;
mat3.c2.z = fCos;
return mat3;
}
public static Mat3 rotateY(float fAngDeg) {
float fAngRad = (float) Math.toRadians(fAngDeg);
float fCos = (float) Math.cos(fAngRad);
float fSin = (float) Math.sin(fAngRad);
Mat3 mat3 = new Mat3(1.0f);
mat3.c0.x = fCos;
mat3.c0.z = -fSin;
mat3.c2.x = fSin;
mat3.c2.z = fCos;
return mat3;
}
public static Mat3 rotateZ(float fAngDeg) {
float fAngRad = (float) Math.toRadians(fAngDeg);
float fCos = (float) Math.cos(fAngRad);
float fSin = (float) Math.sin(fAngRad);
Mat3 mat3 = new Mat3(1.0f);
mat3.c0.x = fCos;
mat3.c0.y = fSin;
mat3.c1.x = -fSin;
mat3.c1.y = fCos;
return mat3;
}
public Mat3 times(Mat3 mat) {
float[] result = new float[9];
float partial;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
partial = 0;
for (int k = 0; k < 3; k++) {
partial += toFloatArray()[3 * k + j] * mat.toFloatArray()[3 * i + k];
}
result[3 * i + j] = partial;
}
}
return new Mat3(result);
}
public Vec3 mult(Vec3 second) {
float[] result = new float[3];
float partial;
for (int i = 0; i < order; i++) {
partial = 0;
for (int j = 0; j < order; j++) {
partial += toFloatArray()[3 * j + i] * second.toFloatArray()[j];
}
result[i] = partial;
}
return new Vec3(result);
}
public Mat3 inverse() {
Mat3 inverse = new Mat3();
inverse.c0.x = +(c1.y * c2.z - c2.y * c1.z);
inverse.c1.x = -(c1.x * c2.z - c2.x * c1.z);
inverse.c2.x = +(c1.x * c2.y - c2.x * c1.y);
inverse.c0.y = -(c0.y * c2.z - c2.y * c0.z);
inverse.c1.y = +(c0.x * c2.z - c2.x * c0.z);
inverse.c2.y = -(c0.x * c2.y - c2.x * c0.y);
inverse.c0.z = +(c0.y * c1.z - c1.y * c0.z);
inverse.c1.z = -(c0.x * c1.z - c1.x * c0.z);
inverse.c2.z = +(c0.x * c1.y - c1.x * c0.y);
inverse.divide(determinant());
return inverse;
}
public Mat3 divide(float s) {
Vec3 newC0 = new Vec3(c0.x / s, c0.y / s, c0.z / s);
Vec3 newC1 = new Vec3(c1.x / s, c1.y / s, c1.z / s);
Vec3 newC2 = new Vec3(c2.x / s, c2.y / s, c2.z / s);
return new Mat3(newC0, newC1, newC2);
}
public float determinant() {
return c0.x * (c1.y * c2.z - c2.y * c1.z) - c1.x * (c0.y * c2.z - c2.y * c0.z) + c2.x * (c0.y * c1.z - c1.y * c0.z);
}
public Mat3 transpose() {
Mat3 result = new Mat3();
result.c0.x = c0.x;
result.c0.y = c1.x;
result.c0.z = c2.x;
result.c1.x = c0.y;
result.c1.y = c1.y;
result.c1.z = c2.y;
result.c2.x = c0.z;
result.c2.y = c1.z;
result.c2.z = c2.z;
return result;
}
public final void set(int index, float value) {
switch (index) {
case 0:
c0.x = value;
break;
case 1:
c0.y = value;
break;
case 2:
c0.z = value;
break;
case 3:
c1.x = value;
break;
case 4:
c1.y = value;
break;
case 5:
c1.z = value;
break;
case 6:
c2.x = value;
break;
case 7:
c2.y = value;
break;
case 8:
c2.z = value;
break;
}
}
public final float get(int index) {
switch (index) {
case 0:
return c0.x;
case 1:
return c0.y;
case 2:
return c0.z;
case 3:
return c1.x;
case 4:
return c1.y;
case 5:
return c1.z;
case 6:
return c2.x;
case 7:
return c1.y;
case 8:
return c1.z;
}
return -1;
}
public void print() {
System.out.println(c0.x + " " + c1.x + " " + c2.x + "\n");
System.out.println(c0.y + " " + c1.y + " " + c2.y + "\n");
System.out.println(c0.z + " " + c1.z + " " + c2.z + "\n");
}
public void print(String title) {
System.out.println("" + title);
System.out.println(c0.x + " " + c1.x + " " + c2.x + "\n");
System.out.println(c0.y + " " + c1.y + " " + c2.y + "\n");
System.out.println(c0.z + " " + c1.z + " " + c2.z + "\n");
}
}
