Continued to simplify main function and build up game engine api

src/main.c

@@ -22,7 +22,9 @@ GLFWwindow** window;
 
 static GLfloat vertexBufferData[1000];
 
-void setVertexBufferData(GLfloat*, unsigned int*, unsigned int);
+void updateWindow(GLFWwindow** window, GLuint vertexBuffer);
+void terminateProgram(GLuint* vertexBufferPtr, GLuint* vertexArrayIDPtr, GLuint programID);
+bool shouldTerminate(GLFWwindow** window);
 
 int main()
 {
@@ -50,8 +52,6 @@ int main()
     
     vec3s direction = {0.0f, 0.0f, -5.0f};
 
-    printf("Entering main loop\n");
-
     do
     {
         glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
@@ -69,8 +69,17 @@ int main()
 
         shaderSetMat4(programID, "view", &view);
         shaderSetMat4(programID, "model", &model);
+        
+        updateWindow(window, vertexBuffer);
+    }
+    while(!shouldTerminate(window));
 
+    terminateProgram(&vertexBuffer, &vertexArrayID, programID);
+    return 0;
+}
 
+void updateWindow(GLFWwindow** window, GLuint vertexBuffer)
+{
         glEnableVertexAttribArray(0);
         glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
 
@@ -85,20 +94,24 @@ int main()
 
         glDrawArrays(GL_TRIANGLES, 0, 20*3);
         glDisableVertexAttribArray(0);
-        
 
         glfwSwapBuffers(window);
         glfwPollEvents();
-    }
+}
-    while( (glfwGetKey(window, GLFW_KEY_Q) != GLFW_PRESS 
-            && glfwGetKey(window, GLFW_KEY_ESCAPE) != GLFW_PRESS)
-            && !glfwWindowShouldClose(window));
 
-    glDeleteBuffers(1, &vertexBuffer);
+void terminateProgram(GLuint* vertexBufferPtr, GLuint* vertexArrayIDPtr, GLuint programID)
+{
+    glDeleteBuffers(1, vertexBufferPtr);
     glDeleteProgram(programID);
-    glDeleteVertexArrays(1, &vertexArrayID);
+    glDeleteVertexArrays(1, vertexArrayIDPtr);
 
     glfwTerminate();
-
+}
-    return 0;
+
+bool shouldTerminate(GLFWwindow** window)
+{
+    // quit on <ESC>, <Q>, or when otherwise told to
+    return glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS
+        || glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS
+        || glfwWindowShouldClose(window);
 }

src/meshing.h

@@ -0,0 +1,11 @@
+#include <cglm/struct.h>
+
+typedef struct
+{
+    unsigned int numVertices;
+    unsigned int numTexCoords;
+    unsigned int numNormals;
+    vec3s* vertices;   
+    vec2s* texCoords;
+    vec3s* normals;
+} mesh;

src/worldgen.c

@@ -12,18 +12,18 @@
 #define TWICE_RSQRT5 0.8944271909999159f
 #define GOLDEN 1.618033988749895f
 
-worldMesh* generateWorld(vec3s position)
+mesh* generateWorld(vec3s position)
 {
     // placeholder struct for world mesh
-    worldMesh* mesh = (worldMesh*) malloc(sizeof(worldMesh));
+    mesh* worldMesh = (mesh*) malloc(sizeof(mesh));
-    populateIcosphere(mesh, ORDER, 1.0f);
+    populateIcosphere(worldMesh, ORDER, 1.0f);
-    return mesh;
+    return worldMesh;
 }
 
-void populateIcosphere(worldMesh* mesh, unsigned char order, GLfloat radius)
+void populateIcosphere(mesh* worldMesh, unsigned char order, GLfloat radius)
 {
     int T = powf(4, order);
-    mesh->vertexArrayCount = (10*T + 2) * 3; // Final heap array size for vertices
+    worldMesh->numVertices = (10*T + 2) * 3; // Final heap array size for vertices
 
     // Initial vertex array. Not used other than to initialize heap array in mesh
     GLfloat vertices[] = {
@@ -39,23 +39,13 @@ void populateIcosphere(worldMesh* mesh, unsigned char order, GLfloat radius)
         3, 9, 4, 3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9, 
         9, 8, 1, 4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7
     };
-
-    mesh->triangleArrayCount = 20*T*3;
-    normalizeVertices(vertices, mesh->vertexArrayCount, radius);
-
-    // Move vetex and triangle data into mesh struct
-    mesh->vertices = (GLfloat*) malloc(sizeof(GLfloat) * mesh->vertexArrayCount);
-    memcpy(mesh->vertices, vertices, sizeof(GLfloat) * mesh->vertexArrayCount);
-
-    mesh->triangles = (unsigned int*) malloc(sizeof(unsigned int) * mesh->triangleArrayCount);
-    memcpy(mesh->triangles, triangles, sizeof(unsigned int) * 60);
 }
 
-void normalizeVertices(GLfloat* vertices, unsigned int vertexArrayCount, GLfloat radius)
+void normalizeVertices(GLfloat* vertices, unsigned int numVertices, GLfloat radius)
 {
-    printf("Normalizing %d vertices\n", vertexArrayCount);
+    printf("Normalizing %d vertices\n", numVertices);
     vec3s vertex;
-    for( int i = 0; i < vertexArrayCount; i += 3)
+    for( int i = 0; i < numVertices; i += 3)
     {
             vertex.x = vertices[i];
             vertex.y = vertices[i + 1];

src/worldgen.h

@@ -1,14 +1,7 @@
 #include <cglm/struct.h>
 #include <GL/glew.h>
 
-typedef struct worldMesh
+#include "meshing.h"
-{
-    unsigned int vertexArrayCount;
-    unsigned int triangleArrayCount;
-    GLfloat* vertices;
-    unsigned int* triangles;
-} worldMesh;
-
 
 /*!
  * @brief top-level world generation function
@@ -16,8 +9,8 @@ typedef struct worldMesh
  * @param[in] pos       the position of the center of the roughly spherical world
  * @return          the world mesh as a heap-allocated list of vertices.
  */
-worldMesh* generateWorld(vec3s pos);
+mesh* generateWorld(vec3s pos);
-void populateIcosphere(worldMesh* mesh, unsigned char order, GLfloat radius);
+void populateIcosphere(mesh* mesh, unsigned char order, GLfloat radius);
 void normalizeVertices(GLfloat* vertices, unsigned int vertexArrayCount, GLfloat radius);
 
 unsigned int reducedSymmetricPair(unsigned int, unsigned int);