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REVIEWED: Spline cubic bezier example

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Ray 2024-06-16 10:41:47 +02:00
parent 4119b6dd66
commit 715633e0de
2 changed files with 39 additions and 28 deletions
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37
examples/shapes/shapes_splines_drawing.c
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@ -56,6 +56,10 @@ int main(void)
{ 710.0f, 260.0f },
};
// Array required for spline bezier-cubic,
// including control points interleaved with start-end segment points
Vector2 pointsInterleaved[3*(MAX_SPLINE_POINTS - 1) + 1] = { 0 };
int pointCount = 5;
int selectedPoint = -1;
int focusedPoint = -1;
@ -188,23 +192,32 @@ int main(void)
}
else if (splineTypeActive == SPLINE_BEZIER)
{
// Draw spline: cubic-bezier (with control points)
Vector2 fullPoints[3*(MAX_SPLINE_POINTS-1)+1] = {0};
for (int i = 0; i < pointCount-1; i++) {
fullPoints[3*i] = points[i];
fullPoints[3*i+1] = control[i].start;
fullPoints[3*i+2] = control[i].end;
// NOTE: Cubic-bezier spline requires the 2 control points of each segnment to be
// provided interleaved with the start and end point of every segment
for (int i = 0; i < (pointCount - 1); i++)
{
pointsInterleaved[3*i] = points[i];
pointsInterleaved[3*i + 1] = control[i].start;
pointsInterleaved[3*i + 2] = control[i].end;
}
fullPoints[3*(pointCount-1)] = points[pointCount-1],
DrawSplineBezierCubic(fullPoints, 3*(pointCount-1)+1, splineThickness, RED);
pointsInterleaved[3*(pointCount - 1)] = points[pointCount - 1];
for (int i = 0; i < pointCount - 1; i++)
// Draw spline: cubic-bezier (with control points)
DrawSplineBezierCubic(pointsInterleaved, 3*(pointCount - 1) + 1, splineThickness, RED);
/*
for (int i = 0; i < 3*(pointCount - 1); i += 3)
{
// Drawing individual segments, not considering thickness connection compensation
// DrawSplineSegmentBezierCubic(points[i], control[i].start, control[i].end, points[i + 1], splineThickness, RED);
DrawSplineSegmentBezierCubic(pointsInterleaved[i], pointsInterleaved[i + 1], pointsInterleaved[i + 2], pointsInterleaved[i + 3], splineThickness, MAROON);
}
*/
// Every cubic bezier point should have two control points
// Draw spline control points
for (int i = 0; i < pointCount - 1; i++)
{
// Every cubic bezier point have two control points
DrawCircleV(control[i].start, 6, GOLD);
DrawCircleV(control[i].end, 6, GOLD);
if (focusedControlPoint == &control[i].start) DrawCircleV(control[i].start, 8, GREEN);