At least I have a working sun theme, but this will have to wait until next summer I suppose

7 files changed, 154 insertions, 6 deletions

diff --git a/themes/Renderer2d.cpp b/themes/Renderer2d.cpp
index dacebe3..606b7fc 100644
--- a/themes/Renderer2d.cpp
+++ b/themes/Renderer2d.cpp
@@ -5,7 +5,7 @@
 #include <cstdio>
 
 // Note: In the 'transform' attribute, the transform.x is the scale,
-// transform.y is the rotation, and transform.zw is the translatiob.
+// transform.y is the rotation, and transform.zw is the translation.
 const char* Vertex2DShader = 
 "attribute vec2 position; \n"
 "attribute vec4 color; \n"
@@ -64,6 +64,7 @@ void Renderer2d::unload() {
 
 
 void Mesh2D::load(Vertex2D* inVertices, u32 inNumVertices, Renderer2d* renderer) {
+	ebo = 0;
 	numVertices = inNumVertices;
 	useShader(renderer->shader);
 
@@ -89,15 +90,40 @@ void Mesh2D::load(Vertex2D* inVertices, u32 inNumVertices, Renderer2d* renderer)
 	glBindVertexArray(0);
 }
 
-void Mesh2D::render(Renderer2d* renderer, GLenum drawType) {
-	setShaderMat4(renderer->uniforms.model, model);
 
+void Mesh2D::load(Vertex2D* vertices,
+		  u32 numVertices,
+		  u32* indices,
+		  u32 inNumIndices,
+		  Renderer2d* renderer) {
+	load(vertices, numVertices, renderer);
 	glBindVertexArray(vao);
-	glDrawArrays(drawType, 0, numVertices);
+	glGenBuffers(1, &ebo);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, inNumIndices * sizeof(u32), &indices[0], GL_STATIC_DRAW);
+	numIndices = inNumIndices;
 	glBindVertexArray(0);
 }
 
+void Mesh2D::render(Renderer2d* renderer, GLenum drawType) {
+	setShaderMat4(renderer->uniforms.model, model);
+
+	if (ebo == 0) {
+		glBindVertexArray(vao);
+		glDrawArrays(drawType, 0, numVertices);
+		glBindVertexArray(0);
+	}
+	else {
+		glBindVertexArray(vao);
+		glDrawElements(GL_TRIANGLES, numIndices, GL_UNSIGNED_INT, 0);
+		glBindVertexArray(0);
+	}
+}
+
 void Mesh2D::unload() {
 	glDeleteVertexArrays(1, &vao);
 	glDeleteBuffers(1, &vbo);
+	if (ebo) {
+		glDeleteBuffers(1, &ebo);
+	}
 }
diff --git a/themes/Renderer2d.h b/themes/Renderer2d.h
index 82af673..909f088 100644
--- a/themes/Renderer2d.h
+++ b/themes/Renderer2d.h
@@ -38,10 +38,17 @@ struct Vertex2D {
 struct Mesh2D {
 	u32 vao;
 	u32 vbo;
+	u32 ebo = 0;
 	u32 numVertices = 0;
+	u32 numIndices = 0;
 	Mat4x4 model;
 
 	void load(Vertex2D* vertices, u32 numVertices, Renderer2d* renderer);
+	void load(Vertex2D* vertices,
+			  u32 numVertices,
+			  u32* indices,
+			  u32 numIndices,
+			  Renderer2d* renderer);
 	void render(Renderer2d* renderer, GLenum drawType = GL_TRIANGLES);
 	void unload();
 };
diff --git a/themes/SummerTheme.cpp b/themes/SummerTheme.cpp
new file mode 100644
index 0000000..b23cc71
--- /dev/null
+++ b/themes/SummerTheme.cpp
@@ -0,0 +1,67 @@
+#include "SummerTheme.h"
+#include "Renderer2d.h"
+#include "list.h"
+#include "mathlib.h"
+#include <vector>
+
+void SummerTheme::load(Renderer2d* renderer) {
+	renderer->clearColor = Vector4(0, 181, 286, 255.f).toNormalizedColor();
+	sun.sectors = 180;
+	sun.radius = renderer->context->width / 4.f;
+	sun.load(renderer);
+}
+
+void SummerTheme::update(f32 dtSeconds) {
+	sun.update(dtSeconds);
+}
+
+void SummerTheme::render(Renderer2d* renderer) {
+	sun.render(renderer);
+}
+
+void SummerTheme::unload() {
+	sun.unload();
+}
+
+
+void Sun::load(Renderer2d* renderer) {
+	matte::List<Vertex2D> vertices;
+	matte::List<u32> indices;
+	Vector4 sunColor = Vector4(249, 215, 28, 255).toNormalizedColor();
+	vertices.add({ Vector2(0, 0), sunColor, Mat4x4() });
+
+    f32 radiansPerSector = (2.f * PI) / sectors;
+	for (i32 i = 0; i <= sectors; i++) {
+		f32 radians = radiansPerSector * i;
+		f32 cosAngle = cosf(radians);
+		f32 sinAngle = sinf(radians);
+		Vector2 vertex = Vector2(radius * cosAngle, radius * sinAngle);
+		vertices.add({ vertex, sunColor, 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);
+	mesh.model = Mat4x4().translateByVec2(Vector2(renderer->context->width / 2.f, renderer->context->height / 2.f));
+	vertices.deallocate();
+}
+
+void Sun::update(f32 dtSeconds) {
+
+}
+
+void Sun::render(Renderer2d* renderer) {
+	setShaderMat4(renderer->uniforms.model, mesh.model);
+	glBindVertexArray(mesh.vao);
+    glDrawElements(GL_TRIANGLES, mesh.numIndices, GL_UNSIGNED_INT, 0);
+    glBindVertexArray(0);
+}
+
+void Sun::unload() {
+	mesh.unload();
+}
diff --git a/themes/SummerTheme.h b/themes/SummerTheme.h
new file mode 100644
index 0000000..1d9093a
--- /dev/null
+++ b/themes/SummerTheme.h
@@ -0,0 +1,23 @@
+#pragma once
+#include "types.h"
+#include "Renderer2d.h"
+#include <vector>
+
+struct Sun {
+    f32 radius = 20.f;
+	i32 sectors = 180;
+	Mesh2D mesh;
+
+	void load(Renderer2d* renderer);
+	void update(f32 dtSeconds);
+	void render(Renderer2d* renderer);
+	void unload();
+};
+
+struct SummerTheme {
+	Sun sun;
+	void load(Renderer2d* renderer);
+	void update(f32 dtSeconds);
+	void render(Renderer2d* renderer);
+	void unload();
+};
diff --git a/themes/dist/output.wasm b/themes/dist/output.wasm
index 1cb0170..ced481d 100755
--- a/themes/dist/output.wasm
+++ b/themes/dist/output.wasm
diff --git a/themes/main.cpp b/themes/main.cpp
index ae91ba7..4e82ca0 100644
--- a/themes/main.cpp
+++ b/themes/main.cpp
@@ -5,6 +5,7 @@
 #include "mathlib.h"
 #include "types.h"
 #include "TreeShape.h"
+#include "SummerTheme.h"
 #include "LeafParticleRender.h"
 #include "Snowflake.h"
 #include <cstdio>
@@ -15,7 +16,8 @@ enum Theme {
 	Default = 0,
     Autumn,
 	Winter,
-	Spring
+	Spring,
+	Summer
 };
 
 struct AutumnTheme {
@@ -74,6 +76,7 @@ EM_BOOL selectNone(int eventType, const EmscriptenMouseEvent* mouseEvent, void*
 EM_BOOL selectAutumn(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
 EM_BOOL selectWinter(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
 EM_BOOL selectSpring(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
+EM_BOOL selectSummer(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
 
 WebglContext context;
 Renderer2d renderer2d;
@@ -83,6 +86,7 @@ Theme activeTheme = Theme::Default;
 AutumnTheme autumnTheme;
 WinterTheme winterTheme;
 SpringTheme springTheme;
+SummerTheme summerTheme;
 
 int main() {
 	context.init("#theme_canvas");
@@ -90,6 +94,7 @@ int main() {
 	emscripten_set_click_callback("#theme_button_autumn", NULL, false, selectAutumn);
 	emscripten_set_click_callback("#theme_button_winter", NULL, false, selectWinter);
 	emscripten_set_click_callback("#theme_button_spring", NULL, false, selectSpring);
+	emscripten_set_click_callback("#theme_button_summer", NULL, false, selectSummer);
 	
 	return 0;
 }
@@ -119,6 +124,10 @@ void load(Theme theme) {
 		renderer3d.load(&context);
 		springTheme.load(&renderer3d);
 		break;
+	case Theme::Summer:
+		renderer2d.load(&context);
+		summerTheme.load(&renderer2d);
+		break;
 	default:
 		break;
 	}
@@ -136,6 +145,9 @@ void update(f32 dtSeconds, void* userData) {
 	case Theme::Spring:
 		springTheme.update(dtSeconds);
 		break;
+	case Theme::Summer:
+		summerTheme.update(dtSeconds);
+		break;
 	default:
 		break;
 	}
@@ -154,6 +166,10 @@ void update(f32 dtSeconds, void* userData) {
 		renderer3d.render();
 		springTheme.render(&renderer3d);
 		break;
+	case Theme::Summer:
+		renderer2d.render();
+	    summerTheme.render(&renderer2d);
+		break;
 	default:
 		break;
 	}
@@ -170,6 +186,9 @@ void unload() {
 	case Theme::Spring:
 		springTheme.unload();
 		break;
+	case Theme::Summer:
+		summerTheme.unload();
+		break;
 	default:
 		break;
 	}
@@ -207,6 +226,12 @@ EM_BOOL selectSpring(int eventType, const EmscriptenMouseEvent* mouseEvent, void
 	return true;
 }
 
+EM_BOOL selectSummer(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData) {
+	printf("Summer theme selected\n");
+	load(Theme::Summer);
+	return true;
+}
+
 // -- Autumn theme
 void AutumnTheme::load(Renderer2d* renderer) {
     renderer->clearColor = Vector4(252, 210, 153, 255).toNormalizedColor();
diff --git a/themes/types.h b/themes/types.h
index d5c7938..ae8aa4e 100644
--- a/themes/types.h
+++ b/themes/types.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include <cstdint>
+#include <stdint.h>
 
 typedef int8_t i8;
 typedef int16_t i16;