Matrix Vector multiplication - Java java.lang

Java examples for java.lang:Math Vector

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Description

Matrix Vector multiplication

Demo Code

/**//from  ww w.ja  v  a 2  s  . c om
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//package com.java2s;

public class Main {
    /**
     * Matrix Vector multiplication
     * @param rawMatrix column matrix (4x4)
     * @param vec vector(x,y,z)
     * @return result
     */
    public static float[] mulRowMat4Vec3(final float[] result,
            final float[] rawMatrix, final float[] vec) {
        result[0] = vec[0] * rawMatrix[0] + vec[1] * rawMatrix[1] + vec[2]
                * rawMatrix[2] + rawMatrix[3];
        result[1] = vec[0] * rawMatrix[4] + vec[1] * rawMatrix[5] + vec[2]
                * rawMatrix[6] + rawMatrix[7];
        result[2] = vec[0] * rawMatrix[8] + vec[1] * rawMatrix[9] + vec[2]
                * rawMatrix[10] + rawMatrix[11];

        return result;
    }
}

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