From 57a5158400a7e1ccccfd06af292e782d8eff2e4b Mon Sep 17 00:00:00 2001
From: 0scar <qgt268@alumni.ku.dk>
Date: Mon, 26 Feb 2024 14:55:21 +0100
Subject: Add model asset type

---
 src/resources/CMakeLists.txt                   |  1 +
 src/resources/include/engine/resources.h       | 12 ++++++
 src/resources/include/engine/resources/model.h | 32 ++++++++++++++
 src/resources/src/model.c                      | 58 ++++++++++++++++++++++++++
 4 files changed, 103 insertions(+)
 create mode 100644 src/resources/include/engine/resources/model.h
 create mode 100644 src/resources/src/model.c

(limited to 'src/resources')

diff --git a/src/resources/CMakeLists.txt b/src/resources/CMakeLists.txt
index 6cb68d3..8fd9413 100644
--- a/src/resources/CMakeLists.txt
+++ b/src/resources/CMakeLists.txt
@@ -10,6 +10,7 @@ add_library(daw_resources
   src/fonts.c
   src/scripts.c
   src/textures.c
+  src/model.c
   )
 
 target_include_directories(daw_resources PRIVATE ${DAW_INCLUDE_DIRS})
diff --git a/src/resources/include/engine/resources.h b/src/resources/include/engine/resources.h
index 707bbde..d967403 100644
--- a/src/resources/include/engine/resources.h
+++ b/src/resources/include/engine/resources.h
@@ -34,6 +34,7 @@ enum Asset {
   Asset_shader,
   Asset_shaderprog,
   Asset_texture,
+  Asset_model,
 };
 
 typedef struct {
@@ -69,6 +70,11 @@ typedef struct {
   i32 bpc;
 } Asset_TextureSpec;
 
+typedef struct {
+  enum Asset type;
+  const char* path;
+} Asset_ModelSpec;
+
 typedef union {
   enum Asset type;
   Asset_AudioSpec audio;
@@ -76,8 +82,11 @@ typedef union {
   Asset_ShaderSpec shader;
   Asset_ShaderProgramSpec shaderprog;
   Asset_TextureSpec texture;
+  Asset_ModelSpec model;
 } asset_t;
 
+#include <engine/resources/model.h>
+
 // The resource spec
 typedef struct {
   /* Assorted asset specification, makes reloading them easier. */
@@ -93,6 +102,9 @@ typedef struct {
 
   usize texture_len;
   Texture* texture;
+
+  usize model_len;
+  Model* model;
 } Resources;
 
 #define TextureDefinition(_path, ...) unimplemented
diff --git a/src/resources/include/engine/resources/model.h b/src/resources/include/engine/resources/model.h
new file mode 100644
index 0000000..d22dc21
--- /dev/null
+++ b/src/resources/include/engine/resources/model.h
@@ -0,0 +1,32 @@
+#ifndef ENGINE_RESOURCES_MODEL_H
+#define ENGINE_RESOURCES_MODEL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <engine/core/types.h>
+#include <cglm/cglm.h>
+#include <glad/gl.h>
+
+typedef enum {
+  Model_error,
+  Model_obj,
+} ModelType;
+
+typedef struct {
+  ModelType format;
+
+  GLuint m_uiVAO;
+  GLuint m_uiVBO;
+  GLuint m_uiIBO;
+  unsigned m_uiNumIndices;
+} Model;
+
+#include <engine/resources.h>
+Model load_model(const Asset_ModelSpec *restrict ms);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/src/resources/src/model.c b/src/resources/src/model.c
new file mode 100644
index 0000000..893036a
--- /dev/null
+++ b/src/resources/src/model.c
@@ -0,0 +1,58 @@
+#include <engine/core/logging.h>
+#include <engine/resources/model.h>
+
+Model load_model(const Asset_ModelSpec *restrict ms) {
+  ModelType format = Model_error;
+
+  isize vertices_len = 0;
+  vec3 *vertices = malloc(sizeof(vec3) * 512);
+  usize *vertices_idx = malloc(sizeof(usize) * 512);
+
+  isize uvs_len = 0;
+  vec2 *uvs = malloc(sizeof(vec2) * 512);
+  usize *uvs_idx = malloc(sizeof(usize) * 512);
+
+  isize normals_len = 0;
+  vec3 *normals = malloc(sizeof(vec3) * 512);
+  usize *normals_idx = malloc(sizeof(usize) * 512);
+
+  // For now, just default to obj
+  format = Model_obj;
+
+  //FILE* f = fopen(ms->path, "r");
+  //if (f == NULL) {
+  //  ERROR("Failed to load file " TERM_COLOR_YELLOW "%s" TERM_COLOR_RESET, ms->path);
+  //  return (Model){.format = format};
+  //}
+
+  //// Start the import on the given file with some example postprocessing
+  //// Usually - if speed is not the most important aspect for you - you'll t
+  //// probably to request more postprocessing than we do in this example.
+  //const struct aiScene* scene = aiImportFile( pFile,
+  //  aiProcess_CalcTangentSpace       |
+  //  aiProcess_Triangulate            |
+  //  aiProcess_JoinIdenticalVertices  |
+  //  aiProcess_SortByPType);
+
+  //// If the import failed, report it
+  //if( NULL == scene) {
+  //  DoTheErrorLogging( aiGetErrorString());
+  //  return false;
+  //}
+
+  //// Now we can access the file's contents
+  //DoTheSceneProcessing( scene);
+
+  //// We're done. Release all resources associated with this import
+  //aiReleaseImport( scene);
+  //return true;
+
+  {
+    Model m = {};
+    m.format = format;
+
+    // TODO add index array
+
+    return m;
+  }
+}
-- 
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