From ec0b1d450a0f6219b3b0d352cd6625ae05f62618 Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <matthew@matthewkosarek.xyz>
Date: Wed, 27 Sep 2023 07:42:11 -0400
Subject: Hills in the AutumnTheme

---
 themes/src/shapes_2d.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'themes/src/shapes_2d.cpp')

diff --git a/themes/src/shapes_2d.cpp b/themes/src/shapes_2d.cpp
index a85e0da..d5a29ed 100644
--- a/themes/src/shapes_2d.cpp
+++ b/themes/src/shapes_2d.cpp
@@ -1,6 +1,7 @@
 #include "shapes_2d.h"
 #include "Renderer2d.h"
 #include "mathlib.h"
+#include "list.h"
 
 RectangularGradient::RectangularGradient(Renderer2d& renderer,
                                          Vector4 top,
@@ -37,3 +38,51 @@ void RectangularGradient::render()
 {
     mesh.render(&renderer);
 }
+
+
+Circleish::Circleish(
+    Renderer2d& renderer,
+    f32 radius,
+    Vector4 color,
+    i32 segments,
+    i32 segment_start,
+    i32 segment_end)
+    : renderer{renderer}
+{
+    matte::List<Vertex2D> vertices;
+	matte::List<u32> indices;
+	vertices.add({ Vector2(0, 0), color, Mat4x4() });
+
+    if (segment_end == 0)
+        segment_end = segments;
+
+    f32 radiansPerSector = (2.f * PI) / segments;
+	for (i32 i = segment_start; i <= segment_end; i++) {
+		f32 radians = radiansPerSector * i;
+		f32 cosAngle = cosf(radians);
+		f32 sinAngle = sinf(radians);
+		Vector2 vertex = Vector2(radius * cosAngle, radius * sinAngle);
+		vertices.add({ vertex, color, Mat4x4() });
+
+		u32 first = i;
+		u32 second = 0;
+		u32 third = i + 1;
+		indices.add(first);
+		indices.add(second);
+		indices.add(third);
+	}
+	
+	mesh.load(&vertices.data[0], vertices.numElements, &indices.data[0], indices.numElements, &renderer);
+	vertices.deallocate();
+	indices.deallocate();
+}
+
+Circleish::~Circleish()
+{
+    mesh.unload();
+}
+
+void Circleish::render()
+{
+    mesh.render(&renderer);
+}
-- 
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