fix buffer size bug

src/render_object.cpp

@@ -128,7 +128,7 @@ initGLFloatBuffer(glm::vec3* buffer, uint count, GLuint& buffer_id)
 	glGenBuffers(1, &buffer_id);
 	glBindBuffer(GL_ARRAY_BUFFER, buffer_id);
 	glBufferData(GL_ARRAY_BUFFER,
-		count * sizeof(GLfloat),
+		count * 3 * sizeof(GLfloat), // NOTE: 3 floats per vertex prop
 		buffer,
 		GL_STATIC_DRAW);