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REVIEWED: `DrawLineCatmullRom()`

This commit is contained in:
Ray 2023-08-12 19:31:29 +02:00
parent d873d0f173
commit bf705a63de
1 changed files with 12 additions and 15 deletions
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27
src/rshapes.c
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@ -437,11 +437,9 @@ void DrawLineCatmullRom(Vector2 *points, int pointCount, float thick, Color colo
vertices[1].y = currentPoint.y + dx*size;
}
// TODO: Something is wrong with this implementation,
// it should use 'j' instead of 'i' but it does not work...
for (int i = 1; i <= SPLINE_LINE_DIVISIONS; i++)
for (int j = 1; j <= SPLINE_LINE_DIVISIONS; j++)
{
t = ((float)i)/((float)SPLINE_LINE_DIVISIONS);
t = ((float)j)/((float)SPLINE_LINE_DIVISIONS);
float q0 = (-1.0f*t*t*t) + (2.0f*t*t) + (-1.0f*t);
float q1 = (3.0f*t*t*t) + (-5.0f*t*t) + 2.0f;
@ -451,11 +449,11 @@ void DrawLineCatmullRom(Vector2 *points, int pointCount, float thick, Color colo
nextPoint.x = 0.5f*((p1.x*q0) + (p2.x*q1) + (p3.x*q2) + (p4.x*q3));
nextPoint.y = 0.5f*((p1.y*q0) + (p2.y*q1) + (p3.y*q2) + (p4.y*q3));
float dy = nextPoint.y - currentPoint.y;
float dx = nextPoint.x - currentPoint.x;
float size = (0.5f*thick)/sqrtf(dx*dx + dy*dy);
dy = nextPoint.y - currentPoint.y;
dx = nextPoint.x - currentPoint.x;
size = (0.5f*thick)/sqrtf(dx*dx + dy*dy);
if (i == 1)
if ((i == 0) && (j == 1))
{
vertices[0].x = currentPoint.x + dy*size;
vertices[0].y = currentPoint.y - dx*size;
@ -463,19 +461,18 @@ void DrawLineCatmullRom(Vector2 *points, int pointCount, float thick, Color colo
vertices[1].y = currentPoint.y + dx*size;
}
vertices[2*i + 1].x = nextPoint.x - dy*size;
vertices[2*i + 1].y = nextPoint.y + dx*size;
vertices[2*i].x = nextPoint.x + dy*size;
vertices[2*i].y = nextPoint.y - dx*size;
vertices[2*j + 1].x = nextPoint.x - dy*size;
vertices[2*j + 1].y = nextPoint.y + dx*size;
vertices[2*j].x = nextPoint.x + dy*size;
vertices[2*j].y = nextPoint.y - dx*size;
currentPoint = nextPoint;
}
DrawTriangleStrip(vertices, 2*SPLINE_LINE_DIVISIONS + 2, color);
// TODO: REVIEW: HACK: Drawing a circle at points intersection to hide broken strip
DrawCircleV(currentPoint, thick/2.0f, color);
}
DrawCircleV(currentPoint, thick/2.0f, color); // Draw end line circle-cap
}
// Draw lines sequence