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scale rotation transformation using matrix

Ya hellll noooo answered on March 26, 2024 Popularity 3/10 Helpfulness 1/10

answer scale rotation transformation using matrix

related scale rotation transformation matrix

scale rotation transformation using matrix

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function toWorld(x,y){        
    var xx, yy, m, result;
    m = invMatrix;
    xx = x - matrix[4];     // remove the translation 
    yy = y - matrix[5];     // by subtracting the origin
    // return the point {x:?,y:?} by multiplying xx,yy by the inverse matrix
    return {
       x:   xx * m[0] + yy * m[2],
       y:   xx * m[1] + yy * m[3]
    }
}

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: javascript matrix rotation scale transformation using

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Contributed on Mar 26 2024

Ya hellll noooo

0 Answers Avg Quality 2/10

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scale rotation transformation matrix

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var matrix = [1,0,0,1,0,0];
var invMatrix = [1,0,0,1];
function createMatrix(x, y, scale, rotate){
    var m = matrix; // just to make it easier to type and read
    var im = invMatrix; // just to make it easier to type and read

    // create the rotation and scale parts of the matrix
    m[3] =   m[0] = Math.cos(rotate) * scale;
    m[2] = -(m[1] = Math.sin(rotate) * scale);

    // add the translation
    m[4] = x;
    m[5] = y;

    // calculate the inverse transformation

    // first get the cross product of x axis and y axis
    cross = m[0] * m[3] - m[1] * m[2];

    // now get the inverted axis
    im[0] =  m[3] / cross;
    im[1] = -m[1] / cross;
    im[2] = -m[2] / cross;
    im[3] =  m[0] / cross;
 }

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: javascript rotation scale transformation-matrix

Link to this answer
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Contributed on Mar 26 2024

Ya hellll noooo

0 Answers Avg Quality 2/10

scale rotation transformation using matrix

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scale rotation transformation using matrix

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scale rotation transformation matrix

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