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[rshapes] Add DrawEllipseLinesEx()

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Add DrawEllipseLinesEx() to the API for consistency with other shape drawing functions.
This commit is contained in:
Matthew Roush 2026-07-20 17:29:17 -04:00
commit c2232b839d
2 changed files with 71 additions and 0 deletions
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1
src/raylib.h
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@ -1313,6 +1313,7 @@ RLAPI void DrawEllipse(int centerX, int centerY, float radiusH, float radiusV, C
RLAPI void DrawEllipseV(Vector2 center, float radiusH, float radiusV, Color color); // Draw ellipse (Vector version) RLAPI void DrawEllipseV(Vector2 center, float radiusH, float radiusV, Color color); // Draw ellipse (Vector version)
RLAPI void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color); // Draw ellipse outline RLAPI void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color); // Draw ellipse outline
RLAPI void DrawEllipseLinesV(Vector2 center, float radiusH, float radiusV, Color color); // Draw ellipse outline (Vector version) RLAPI void DrawEllipseLinesV(Vector2 center, float radiusH, float radiusV, Color color); // Draw ellipse outline (Vector version)
RLAPI void DrawEllipseLinesEx(Vector2 center, float radiusH, float radiusV, float thick, Color color); // Draw ellipse outline with line thickness
RLAPI void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color); // Draw ring RLAPI void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color); // Draw ring
RLAPI void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color); // Draw ring outline RLAPI void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color); // Draw ring outline

70
src/rshapes.c
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@ -1690,6 +1690,76 @@ void DrawEllipseLinesV(Vector2 center, float radiusH, float radiusV, Color color
rlEnd(); rlEnd();
} }
// Draw ellipse outline with thickness
void DrawEllipseLinesEx(Vector2 center, float radiusH, float radiusV, float thick, Color color)
{
float outerRadiusH = radiusH, innerRadiusH = radiusH - thick;
float outerRadiusV = radiusV, innerRadiusV = radiusV - thick;
if (thick >= 0.0f) {
// Just a filled-in ellipse
if (innerRadiusH <= 0.0f || innerRadiusV <= 0.0f)
{
DrawEllipseV(center, radiusH, radiusV, color);
return;
}
}
else
{
// The outline is growing outside of the ellipse, so swap the inner and outer radius
float tmp = outerRadiusH;
outerRadiusH = innerRadiusH;
innerRadiusH = tmp;
tmp = outerRadiusV;
outerRadiusV = innerRadiusV;
innerRadiusV = tmp;
}
#if SUPPORT_QUADS_DRAW_MODE
rlSetTexture(GetShapesTexture().id);
Rectangle shapeRect = GetShapesTextureRectangle();
rlBegin(RL_QUADS);
rlColor4ub(color.r, color.g, color.b, color.a);
for (int i = 0; i < 360; i += 10)
{
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
rlVertex2f(center.x + cosf(DEG2RAD*i)*innerRadiusH, center.y + sinf(DEG2RAD*i)*innerRadiusV);
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
rlVertex2f(center.x + cosf(DEG2RAD*(i + 10))*innerRadiusH, center.y + sinf(DEG2RAD*(i + 10))*innerRadiusV);
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
rlVertex2f(center.x + cosf(DEG2RAD*(i + 10))*outerRadiusH, center.y + sinf(DEG2RAD*(i + 10))*outerRadiusV);
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
rlVertex2f(center.x + cosf(DEG2RAD*i)*outerRadiusH, center.y + sinf(DEG2RAD*i)*outerRadiusV);
}
rlEnd();
rlSetTexture(0);
#else
rlBegin(RL_TRIANGLES);
rlColor4ub(color.r, color.g, color.b, color.a);
for (int i = 0; i < 360; i += 10)
{
rlVertex2f(center.x + cosf(DEG2RAD*i)*innerRadiusH, center.y + sinf(DEG2RAD*i)*innerRadiusV);
rlVertex2f(center.x + cosf(DEG2RAD*(i + 10))*innerRadiusH, center.y + sinf(DEG2RAD*(i + 10))*innerRadiusV);
rlVertex2f(center.x + cosf(DEG2RAD*(i + 10))*outerRadiusH, center.y + sinf(DEG2RAD*(i + 10))*outerRadiusV);
rlVertex2f(center.x + cosf(DEG2RAD*i)*innerRadiusH, center.y + sinf(DEG2RAD*i)*innerRadiusV);
rlVertex2f(center.x + cosf(DEG2RAD*(i + 10))*outerRadiusH, center.y + sinf(DEG2RAD*(i + 10))*outerRadiusV);
rlVertex2f(center.x + cosf(DEG2RAD*i)*outerRadiusH, center.y + sinf(DEG2RAD*i)*outerRadiusV);
}
rlEnd();
#endif
}
// Draw ring // Draw ring
void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color) void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color)
{ {