4 files changed, 54 insertions, 7 deletions

diff --git a/shared_cpp/Renderer2d.cpp b/shared_cpp/Renderer2d.cpp
index adef4de..c050172 100644
--- a/shared_cpp/Renderer2d.cpp
+++ b/shared_cpp/Renderer2d.cpp
@@ -3,15 +3,16 @@
 #include "mathlib.h"
 
 const char* orthographicVertex = 
-"attribute vec2 position; \n"
+"attribute vec4 position; \n"
 "attribute vec4 color; \n"
 "uniform mat4 projection; \n"
 "uniform mat4 model; \n"
 "varying lowp vec4 VertexColor; \n"
 "void main() { \n"
-"    vec4 fragmentPosition = projection * model * vec4(position, 1, 1); \n"
+"    vec4 fragmentPosition = projection * model * position; \n"
 "    gl_Position = fragmentPosition; \n"
 "    VertexColor = color; \n"
+"    gl_PointSize = 2.0; \n"
 "}";
 
 const char* orthographicFragment = 
@@ -55,6 +56,7 @@ void Renderer2d::unload() {
 void Mesh2d::load(Vertex2d* inVertices, uint32 inNumVertices, Renderer2d* renderer, GLenum loadType) {
     mode = MeshMode::Vertex;
 	numVertices = inNumVertices;
+	isDynamic = loadType == GL_DYNAMIC_DRAW;
 	useShader(renderer->shader);
 
 	glGenVertexArrays(1, &vao);
@@ -65,7 +67,7 @@ void Mesh2d::load(Vertex2d* inVertices, uint32 inNumVertices, Renderer2d* render
 	glBufferData(GL_ARRAY_BUFFER, inNumVertices * sizeof(Vertex2d), &inVertices[0], loadType);
 
 	glEnableVertexAttribArray(renderer->attributes.position);
-	glVertexAttribPointer(renderer->attributes.position, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2d), (GLvoid *)0);
+	glVertexAttribPointer(renderer->attributes.position, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex2d), (GLvoid *)0);
 
 	glEnableVertexAttribArray(renderer->attributes.color);
 	glVertexAttribPointer(renderer->attributes.color, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex2d), (GLvoid *)offsetof(Vertex2d, color));
@@ -78,6 +80,7 @@ void Mesh2d::load(Vertex2d* inVertices, uint32 inNumVertices, GLuint* inIndices,
 	mode = MeshMode::Index;
 	numVertices = inNumVertices;
 	numIndices = inNumIndices;
+	isDynamic = loadType == GL_DYNAMIC_DRAW;
 	useShader(renderer->shader);
 
 	glGenVertexArrays(1, &vao);
@@ -88,7 +91,7 @@ void Mesh2d::load(Vertex2d* inVertices, uint32 inNumVertices, GLuint* inIndices,
 	glBufferData(GL_ARRAY_BUFFER, inNumVertices * sizeof(Vertex2d), &inVertices[0], loadType);
 
 	glEnableVertexAttribArray(renderer->attributes.position);
-	glVertexAttribPointer(renderer->attributes.position, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2d), (GLvoid *)0);
+	glVertexAttribPointer(renderer->attributes.position, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex2d), (GLvoid *)0);
 
 	glEnableVertexAttribArray(renderer->attributes.color);
 	glVertexAttribPointer(renderer->attributes.color, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex2d), (GLvoid *)offsetof(Vertex2d, color));
@@ -116,8 +119,7 @@ void Mesh2d::render(Renderer2d* renderer, GLenum drawType) {
 	}
 
 	glBindVertexArray(0);
-}	
-	
+}
 
 void Mesh2d::unload() {
 	glDeleteVertexArrays(1, &vao);
@@ -128,3 +130,13 @@ void Mesh2d::unload() {
 		glDeleteBuffers(1, &ebo);
 	}
 }
+
+void Mesh2d::updateVertices(Vertex2d* vertices) {
+	if (!isDynamic) {
+		printf("Cannot update vertices on a non-dynamic mesh.\n");
+		return;
+	}
+	
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+    glBufferSubData(GL_ARRAY_BUFFER, 0, numVertices * sizeof(Vertex2d), &vertices[0]);
+}
diff --git a/shared_cpp/Renderer2d.h b/shared_cpp/Renderer2d.h
index a942fa6..3ecb410 100644
--- a/shared_cpp/Renderer2d.h
+++ b/shared_cpp/Renderer2d.h
@@ -27,7 +27,7 @@ struct Renderer2d {
 };
 
 struct Vertex2d {
-	Vector2 position;
+	Vector4 position;
 	Vector4 color;
 };
 
@@ -44,9 +44,12 @@ struct Mesh2d {
 	uint32 numVertices = 0;
 	uint32 numIndices = 0;
 	Mat4x4 model;
+	bool isDynamic = false;
 
 	void load(Vertex2d* vertices, uint32 numVertices, Renderer2d* renderer, GLenum loadType = GL_STATIC_DRAW);
 	void load(Vertex2d* vertices, uint32 numVertices, GLuint* indices, uint32 numIndices, Renderer2d* renderer, GLenum loadType = GL_STATIC_DRAW);
 	void render(Renderer2d* renderer, GLenum drawType = GL_TRIANGLES);
 	void unload();
+
+	void updateVertices(Vertex2d* vertices);
 };
diff --git a/shared_cpp/mathlib.cpp b/shared_cpp/mathlib.cpp
index 5996ba3..c9f2e0d 100644
--- a/shared_cpp/mathlib.cpp
+++ b/shared_cpp/mathlib.cpp
@@ -234,6 +234,20 @@ Vector4::Vector4(float inX, float inY, float inZ, float inW) {
     w = inW;
 }
 
+Vector4::Vector4(Vector2& v) {
+	x = v.x;
+	y = v.y;
+	z = 0;
+	w = 1;
+}
+
+Vector4::Vector4(Vector3& v) {
+	x = v.x;
+	y = v.y;
+	z = v.z;
+	w = 1;
+}
+
 Vector4 Vector4::fromColor(float r, float g, float b, float a) {
     float scale = 1.f / 255.f;
     return { r * scale, g * scale, b * scale, a * scale };
@@ -302,6 +316,20 @@ Vector4 lerp(Vector4 start, Vector4 end, float t) {
     return (end - start) * t + start;
 }
 
+void Vector4::operator=(const Vector2& v2) {
+	x = v2.x;
+	y = v2.y;
+	z = 0;
+	w = 1;
+}
+
+void Vector4::operator=(const Vector3& v2) {
+	x = v2.x;
+	y = v2.y;
+	z = v2.z;
+	w = 1;	
+}
+
 Vector4 Vector4::operator+(const Vector4& v2) {
     return add(v2);
 }
diff --git a/shared_cpp/mathlib.h b/shared_cpp/mathlib.h
index fd21ae2..d8a15e7 100644
--- a/shared_cpp/mathlib.h
+++ b/shared_cpp/mathlib.h
@@ -96,6 +96,8 @@ struct Vector4 {
     Vector4(float inX, float inY, float inZ, float inW);
     Vector4 fromColor(float r, float g, float b, float a);
 	Vector4 toNormalizedColor();
+	Vector4(Vector2& v);
+	Vector4(Vector3& v);
 
     float length();
     Vector4 normalize();
@@ -106,6 +108,8 @@ struct Vector4 {
     Vector4 negate();
     Vector4 cross(const Vector4& other);
 
+	void operator=(const Vector2& v2);
+    void operator=(const Vector3& v2);
     Vector4 operator+(const Vector4& v2);
     Vector4 operator-(const Vector4& v2);
     Vector4 operator-();