I'm trying to draw out svg with certain parts highlighted. I have my musclesvg class that contains a name, a path and an isHighlighted bool for each muscle. I then transform every path to a flutter path. Finally I draw each path out. If the muscle should be highlighted I change it's color. The svg however is not scaled up correctly even if I try to scale it with a matrix4.
This is the custompainter:
class MusclePathPainter extends CustomPainter {
final List<SvgMuscle> muscles;
MusclePathPainter({
required this.muscles,
});
@override
void paint(Canvas canvas, Size size) {
Paint highlightPaint = Paint()
..style = PaintingStyle.fill
..color = Colors.black;
highlightPaint.color = Colors.red;
Paint defaultPaint = Paint()
..style = PaintingStyle.fill
..color = Colors.black;
defaultPaint.color = Colors.black;
var xScale = SizeConfig.blockSizeHorizontal / 55;
var yScale = SizeConfig.blockSizeVertical / 100;
final Matrix4 matrix4 = Matrix4.identity();
matrix4.scale(xScale, yScale);
muscles.forEach((muscle) {
Path path = parseSvgPathData(muscle.path);
canvas.drawPath(
path.transform(matrix4.storage),
muscle.isHighlighted! ? highlightPaint : defaultPaint,
);
});
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => true;
}
This is my original svg:
<svg xmlns="http://www.w3.org/2000/svg" width="3540" height="4999" viewBox="0 0 3540 4999">
<path id="Trapèzes" d="M422.389,282.5c52.993-107.776,61.268-215.8,68.119-239.027C494.49,29.97,542.664,4.388,550.115.5h.958c-2.44,178.206-115.664,272.266-128.01,282Zm-39.791,0C370.251,272.766,257.023,178.706,254.584.5h.893c7.25,4.052,55.955,31.618,59.673,42.972,7.543,23.023,15.131,131.25,68.121,239.027ZM497.53,247.573c49.774-81.009,85-135.084,85-135.084,71.752,18.536,149.3,67.088,197.363,100.889,0,0,20.135,13.418,24.8,23.111v6.359c-2.094,2.593-7.829,3.985-19.26,3.193-76.654-5.317-146.3-1.4-197.967,2.522-33.655,2.553-59.681,5.107-75.041,5.107C500.242,253.67,494.771,252.063,497.53,247.573Zm-279.34.991c-51.664-3.92-121.309-7.839-197.958-2.522h0C8.289,246.869,2.553,245.313.7,242.5v-5.443c4.127-9.728,25.069-23.675,25.069-23.675,48.067-33.8,125.609-82.353,197.364-100.889,0,0,35.227,54.075,85,135.084,2.758,4.49-2.713,6.1-14.9,6.1C277.87,253.67,251.843,251.117,218.19,248.564ZM400.865,226s-47.4-135.314-49.776-163.64c-2.247-26.871,13.7-25.412,51.74-25.193,38.037-.22,53.989-1.679,51.74,25.193C452.2,90.684,404.795,226,404.795,226Z" transform="translate(1367.302 -0.5)" fill="#2ca8b9"/>
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<path id="Biceps" d="M1727.93,626.665c-9.124-9.355-112.619-116.245-156.2-195.665-76.906-140.236-130.59-280.467-69.4-430.334h1.534C1519.488,9,1675.53,94.935,1711.572,222.4,1734,301.7,1742.668,369.5,1744.5,425.9v47.366c-2.675,81.6-18.256,132.555-16,153.4Zm-1711.156,0C19.109,604.988,2.156,550.75.5,463.314v-27.4C1.6,377.565,9.913,306.451,33.682,222.4,69.735,94.935,225.771,9,241.394.665h1.534c61.2,149.867,7.516,290.1-69.4,430.334C129.957,510.419,26.465,617.31,17.342,626.665Z" transform="translate(897.5 608.335)" fill="#b90d8a"/>
<path id="Triceps" d="M1474.713,361.792c-13.765-3.729-83.093-26.166-135.8-111.181-56.341-90.87-22.754-237.764-19.864-249.818h.2c.258,12.73,6.483,177.307,157.251,360.824v.176Zm-1474.1,0C151.531,178.2,157.766,13.526,158.024.792h.2c2.889,12.054,36.474,158.949-19.87,249.818C85.647,335.626,16.311,358.063,2.544,361.792Z" transform="translate(1031.5 781.208)" fill="#cc6d32"/>
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<path id="Autres" 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transform="translate(-0.5 1801.298)" fill="#9299a5"/>
</svg>
This is what my list of muscles looks like:
List<SvgMuscle> muscles_front = [
SvgMuscle(name: 'Abdominaux', isHighlighted: true, path: 'M453.789,1134.5c-.132-21.359-2.517-412.484.006-453.867,1.987-32.594,29.234-31.827,29.234-31.827,131.151,1.532,180.939-51.524,180.939-51.524C640.62,1056.276,481.185,1126.444,456.9,1134.5Zm-53.407,0c-24.289-8.057-183.724-78.225-207.072-537.218,0,0,49.789,53.056,180.942,51.524,0,0,27.243-.767,29.231,31.827,2.523,41.383.138,432.508.006,453.867ZM734.574,547.547c11.366-73.4,88.2-110.587,88.2-110.587C788,698.171,818.041,776.328,800.086,868.539,782.153,960.729,661.6,1014.5,661.6,1014.5,707.432,904.38,723.23,620.969,734.574,547.547ZM59.548,868.539c-17.941-92.21,12.08-170.367-22.684-431.579,0,0,76.826,37.187,88.188,110.587,11.363,73.422,27.163,356.834,72.989,466.955C198.041,1014.5,77.492,960.729,59.548,868.539Zm438.7-271.259a321.4,321.4,0,0,1-39.309-2.179s3.244-130.676,5.7-164.452c1.872-25.751,21.162-26.468,21.162-26.468,54.515-3.2,134.48,13.618,170.654,21.667,27.114,6.008,25.284,36.095,25.284,36.095-2.02,119.282-120.065,135.338-183.482,135.338ZM175.536,461.941s-1.832-30.087,25.282-36.095c36.176-8.049,116.141-24.869,170.654-21.667,0,0,19.29.717,21.164,26.468,2.456,33.776,5.7,164.452,5.7,164.452a321.393,321.393,0,0,1-39.308,2.179C295.614,597.281,177.556,581.231,175.536,461.941ZM753.62,372.4c4.477-20.809,16.447-19.416,16.447-19.416,44.644-4.163,71.937-28.23,72.123-28.395-6.264,50.641-31.573,70.545-50.154,73.7a47.548,47.548,0,0,1-7.875.646C767.343,398.936,749.756,390.373,753.62,372.4ZM67.6,398.29c-18.572-3.156-43.9-23.061-50.147-73.7,0,0,27.316,24.218,72.113,28.4,0,0,11.968-1.393,16.445,19.416,3.863,17.973-13.707,26.536-30.532,26.536A47.619,47.619,0,0,1,67.6,398.29Zm399.424-42.43s-5.351-84.836,0-122.279c5.352-37.418,42.833-41.756,73.184-38.74h0c45.518,4.545,87.824,30.667,124.158,53.726,0,0,36.621,18.837,32.676,63.912-2.946,33.917-4.825,77.089-4.825,77.089S570.356,347.113,467.022,355.86ZM160.237,312.479c-3.934-45.075,32.68-63.912,32.68-63.912,36.336-23.058,78.642-49.181,124.156-53.726,30.352-3.016,67.831,1.322,73.184,38.74,5.352,37.443,0,122.279,0,122.279-103.333-8.747-225.189,33.708-225.189,33.708S163.193,346.4,160.237,312.479Zm681.952,12.11h0Zm-73.335-28.17c-.589,0-1.178-.006-1.757-.019-29.624-.626-28.6-49.782,11.32-54.19s77.923-29.021,77.923-29.021c-17.126,67.482-57.951,83.23-87.481,83.23ZM3.3,213.188S41.288,237.8,81.217,242.21s40.95,53.564,11.314,54.19c-.579.013-1.168.019-1.756.019C61.253,296.42,20.412,280.675,3.3,213.188Zm465.989-69.454s-11.105-46.6.083-89.8c11.19-43.219,61.487-36.353,126.927-14.893s94.614,104.229,103.244,174.149C699.544,213.191,572.879,120.469,469.291,143.734ZM260.977,39.042C326.417,17.582,376.716,10.716,387.9,53.935c11.189,43.2.084,89.8.084,89.8C284.4,120.469,157.736,213.191,157.736,213.191,166.359,143.271,195.538,60.5,260.977,39.042ZM767.422,189.68c-1.927,0-3.818-.061-5.66-.175-31.944-1.948-29.833-53.448,13.292-56.324,39.3-2.624,77.221-22.914,83.633-26.49V109.4c-19.447,64.556-60.3,80.276-91.262,80.277ZM.687,108.526v-1.981c5.56,3.123,44.005,23.974,83.894,26.636,43.13,2.876,45.227,54.375,13.29,56.324-1.842.113-3.732.175-5.658.175C61.116,189.68,20.025,173.824.687,108.526ZM755.721,86.1c-.972,0-1.939-.013-2.891-.037-35.308-.905-36.861-52.1,10.393-56.371C806.949,25.743,847.718,3.779,853.6.5h.628c-16.519,69.286-63.512,85.6-98.5,85.6ZM5.421.5H6.05c5.878,3.278,46.64,25.243,90.357,29.192,47.269,4.268,45.7,55.465,10.4,56.371-.952.024-1.919.037-2.891.037C68.927,86.1,21.925,69.791,5.421.5Z'),
…
];
This is the result:
Edit: Tried the following inside my pathpainter:
final fs = applyBoxFit(BoxFit.contain, Size(3540, 5000), size);
final r = Alignment.center.inscribe(fs.destination, Offset.zero & size);
final matrix = Matrix4.translationValues(r.left, r.top, 0)
..scale(fs.destination.width / fs.source.width);
muscles.forEach((muscle) {
Path path = parseSvgPathData(muscle.path);
canvas
..clipRect(Offset.zero & size)
..drawPath(
path.transform(matrix.storage),
muscle.isHighlighted! ? highlightPaint : defaultPaint,
);
});
Which gives me the following:
