loading obj files working.

still bad tho. we leak a-lot. idrc it's a testing repo.

.envrc

@@ -0,0 +1 @@
+use nix

.gitea/workflows/nix-check.yaml

@@ -0,0 +1,13 @@
+name: Verify build
+run-name: ${{ gitea.actor }} is building
+on: [push]
+
+jobs:
+  verify_build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v30
+        with:
+          nix_path: nixpkgs=channel:nixos-24.11
+      - run: nix-shell shell.nix --run make

.gitignore

@@ -0,0 +1,3 @@
+.direnv
+*.o
+ogl

headers/KHR/khrplatform.h

@@ -0,0 +1,311 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+/*
+ * To support platform where unsigned long cannot be used interchangeably with
+ * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
+ * Ideally, we could just use (u)intptr_t everywhere, but this could result in
+ * ABI breakage if khronos_uintptr_t is changed from unsigned long to
+ * unsigned long long or similar (this results in different C++ name mangling).
+ * To avoid changes for existing platforms, we restrict usage of intptr_t to
+ * platforms where the size of a pointer is larger than the size of long.
+ */
+#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
+#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
+#define KHRONOS_USE_INTPTR_T
+#endif
+#endif
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef KHRONOS_USE_INTPTR_T
+typedef intptr_t               khronos_intptr_t;
+typedef uintptr_t              khronos_uintptr_t;
+#elif defined(_WIN64)
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+#endif
+
+#if defined(_WIN64)
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */

headers/camera.hpp

@@ -0,0 +1,29 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+#include <glm/glm.hpp>
+
+class Camera {
+public:
+  Camera(glm::vec3 pos, float yaw, float pitch, float fov, float aspect);
+  ~Camera();
+  void setPos(glm::vec3 pos);
+  void addPos(glm::vec3 pos);
+  void addFPos(glm::vec3 pos);
+  void setRotate(float yaw, float pitch);
+  void addRotate(float yaw, float pitch);
+  glm::vec3 getPos();
+  glm::mat4 getView();
+  glm::mat4 getProjection();
+  float aspect;
+
+private:
+  void update();
+  glm::mat4 projection;
+  glm::vec3 up;
+  glm::vec3 front;
+  glm::vec3 pos;
+  float yaw;
+  float pitch;
+  float fov;
+};
+#endif

headers/mesh.hpp

@@ -0,0 +1,31 @@
+#ifndef MESH_H
+#define MESH_H
+#include "camera.hpp"
+#include "shader.hpp"
+#include <glm/glm.hpp>
+#include <glm/gtc/quaternion.hpp>
+
+class Mesh {
+public:
+  Mesh(Shader *s, unsigned int VAO, int count);
+  Mesh(Shader *s, std::string path);
+  ~Mesh();
+  void draw(Camera *c);
+  void setPosition(glm::vec3 p);
+  void setScale(glm::vec3 s);
+  void setRotation(glm::quat r);
+  void setOwnedBuffers(bool o);
+  void setOwnedShader(bool o);
+  Shader *getShader();
+
+private:
+  bool buffersOwned;
+  bool shaderOwned;
+  int count;
+  unsigned int VAO;
+  Shader *shader;
+  glm::vec3 position; /*0,0,0*/
+  glm::vec3 scale;    /*1,1,1*/
+  glm::quat rotation; /*1,0,0,0*/
+};
+#endif

headers/obj.hpp

@@ -0,0 +1,4 @@
+#include <glm/glm.hpp>
+#include <vector>
+
+unsigned int loadOBJ(const char *path, std::vector<float> *out_vertices);

headers/shader.hpp

@@ -0,0 +1,25 @@
+#ifndef SHADER_H
+#define SHADER_H
+#include <glad/glad.h>
+#include <glm/glm.hpp>
+#include <string>
+
+class Shader {
+public:
+  Shader(const char *vertexPath, const char *fragmentPath);
+  ~Shader();
+  void use();
+  void setInt(const std::string &name, int value);
+  void setFloat(const std::string &name, float value);
+  void setVec3(const std::string &name, glm::vec3 value);
+  void setMat4(const std::string &name, glm::mat4 value);
+
+private:
+  unsigned int ID;
+  unsigned int shaderCMPL(GLenum type, const char *src);
+  void shaderERR(unsigned int shader);
+  unsigned int shaderProgramCMPL(const char *vertexSource,
+                                 const char *fragmentSource);
+  void shaderProgramERR(unsigned int shaderProgram);
+};
+#endif

headers/shapes.h

@@ -0,0 +1,167 @@
+float tri_vertices[] = {
+    -0.5f, -0.5f, 0.0f, /**/
+    0.5f,  -0.5f, 0.0f, /**/
+    0.0f,  0.5f,  0.0f  /**/
+};
+
+float tri_rgb_vertices[] = {
+    0.5f,  -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, /**/
+    -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, /**/
+    0.0f,  0.5f,  0.0f, 0.0f, 0.0f, 1.0f  /**/
+};
+
+float sqr_vertices[] = {
+    0.5f,  0.5f,  0.0f, /*top R*/
+    0.5f,  -0.5f, 0.0f, /*bottom R*/
+    -0.5f, -0.5f, 0.0f, /*bottom L*/
+    -0.5f, 0.5f,  0.0f  /*top R*/
+};
+
+unsigned int sqr_indices[] = {
+    0, 1, 3, /*tl triangle*/
+    1, 2, 3  /*br triangle*/
+};
+
+float sqr_tex_vertices[] = {
+    /*positions*colors*texture coords*/
+    0.5f,  0.5f,  0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, /*top right*/
+    0.5f,  -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, /*bottom right*/
+    -0.5f, -0.5f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, /*bottom left*/
+    -0.5f, 0.5f,  0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f  /*top left*/
+};
+
+float cube_vertices[] = {
+    /*positions*texture cords*/
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, /**/
+    0.5f,  -0.5f, -0.5f, 1.0f, 0.0f, /**/
+    0.5f,  0.5f,  -0.5f, 1.0f, 1.0f, /**/
+    0.5f,  0.5f,  -0.5f, 1.0f, 1.0f, /**/
+    -0.5f, 0.5f,  -0.5f, 0.0f, 1.0f, /**/
+    -0.5f, -0.5f, -0.5f, 0.0f, 0.0f, /**/
+
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, /**/
+    0.5f,  -0.5f, 0.5f,  1.0f, 0.0f, /**/
+    0.5f,  0.5f,  0.5f,  1.0f, 1.0f, /**/
+    0.5f,  0.5f,  0.5f,  1.0f, 1.0f, /**/
+    -0.5f, 0.5f,  0.5f,  0.0f, 1.0f, /**/
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, /**/
+
+    -0.5f, 0.5f,  0.5f,  1.0f, 0.0f, /**/
+    -0.5f, 0.5f,  -0.5f, 1.0f, 1.0f, /**/
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f, /**/
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f, /**/
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, /**/
+    -0.5f, 0.5f,  0.5f,  1.0f, 0.0f, /**/
+
+    0.5f,  0.5f,  0.5f,  1.0f, 0.0f, /**/
+    0.5f,  0.5f,  -0.5f, 1.0f, 1.0f, /**/
+    0.5f,  -0.5f, -0.5f, 0.0f, 1.0f, /**/
+    0.5f,  -0.5f, -0.5f, 0.0f, 1.0f, /**/
+    0.5f,  -0.5f, 0.5f,  0.0f, 0.0f, /**/
+    0.5f,  0.5f,  0.5f,  1.0f, 0.0f, /**/
+
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f, /**/
+    0.5f,  -0.5f, -0.5f, 1.0f, 1.0f, /**/
+    0.5f,  -0.5f, 0.5f,  1.0f, 0.0f, /**/
+    0.5f,  -0.5f, 0.5f,  1.0f, 0.0f, /**/
+    -0.5f, -0.5f, 0.5f,  0.0f, 0.0f, /**/
+    -0.5f, -0.5f, -0.5f, 0.0f, 1.0f, /**/
+
+    -0.5f, 0.5f,  -0.5f, 0.0f, 1.0f, /**/
+    0.5f,  0.5f,  -0.5f, 1.0f, 1.0f, /**/
+    0.5f,  0.5f,  0.5f,  1.0f, 0.0f, /**/
+    0.5f,  0.5f,  0.5f,  1.0f, 0.0f, /**/
+    -0.5f, 0.5f,  0.5f,  0.0f, 0.0f, /**/
+    -0.5f, 0.5f,  -0.5f, 0.0f, 1.0f  /**/
+};
+
+float uvcube[] = {
+  -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+  0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+  0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+  0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+  -0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+  -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+
+  -0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,
+  0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,
+  0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,
+  0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,
+  -0.5f,  0.5f,  0.5f,  0.0f,  0.0f, 1.0f,
+  -0.5f, -0.5f,  0.5f,  0.0f,  0.0f, 1.0f,
+
+  -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,
+  -0.5f,  0.5f, -0.5f, -1.0f,  0.0f,  0.0f,
+  -0.5f, -0.5f, -0.5f, -1.0f,  0.0f,  0.0f,
+  -0.5f, -0.5f, -0.5f, -1.0f,  0.0f,  0.0f,
+  -0.5f, -0.5f,  0.5f, -1.0f,  0.0f,  0.0f,
+  -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,
+
+  0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
+  0.5f,  0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
+  0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
+  0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
+  0.5f, -0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
+  0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
+
+  -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
+  0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
+  0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
+  0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
+  -0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
+  -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
+
+  -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,
+  0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,
+  0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
+  0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
+  -0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
+  -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f
+};
+
+const char *basicVertexShaderSource =
+    "#version 330 core\n"
+    "layout (location = 0) in vec3 aPos;\n"
+    "out vec3 color;\n"
+    "void main()\n"
+    "{\n"
+    "   color = aPos;"
+    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+    "}\0";
+
+const char *basicFragmentShaderSource = "#version 330 core\n"
+                                        "out vec3 FragColor;\n"
+                                        "in vec3 color;"
+                                        "void main()\n"
+                                        "{\n"
+                                        "    FragColor = (color/2+.5)*1.5;\n"
+                                        "}\n";
+
+const char *rgbVertexShaderSource =
+    "#version 330 core\n"
+    "layout (location = 0) in vec3 aPos;\n"
+    "layout (location = 1) in vec3 aColor;\n"
+    "out vec3 color;\n"
+    "void main()\n"
+    "{\n"
+    "   color = aColor;\n"
+    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+    "}\0";
+
+const char *rgbFragmentShaderSource = "#version 330 core\n"
+                                      "out vec4 FragColor;\n"
+                                      "in vec3 color;\n"
+                                      "void main()\n"
+                                      "{\n"
+                                      "    FragColor = vec4(color, 1.0);\n"
+                                      "}\0";
+
+const char *rgbPulseFragmentShaderSource =
+    "#version 330 core\n"
+    "out vec4 FragColor;\n"
+    "in vec3 color;\n"
+    "uniform float u_time;"
+    "void main()\n"
+    "{\n"
+    "    FragColor = vec4(color,0.0)*(sin(u_time)/2.0+0.5);\n"
+    "}\0";

headers/texture.hpp

@@ -0,0 +1,15 @@
+#ifndef TEXTURE_H
+#define TEXTURE_H
+#include <glad/glad.h>
+
+class Texture {
+public:
+  Texture(GLenum type, const char *path);
+  ~Texture();
+  void bind(GLenum texture);
+
+private:
+  unsigned int ID;
+  GLenum type;
+};
+#endif

makefile

@@ -0,0 +1,34 @@
+CC := gcc
+CXX := g++
+CFLAGS := -Wall -Wextra -I headers -ggdb
+CXXFLAGS := -Wall -Wextra -I headers -l glfw  -ggdb
+
+# List all the source files
+C_FILES := $(wildcard src/*.c)
+CPP_FILES := $(wildcard src/*.cpp)
+
+# Generate corresponding object file names
+OBJ_FILES := $(C_FILES:.c=.o) $(CPP_FILES:.cpp=.o)
+
+# Define the target executable
+TARGET := ogl
+
+# Default target
+all: $(TARGET)
+
+# Linking rule
+$(TARGET): $(OBJ_FILES)
+	$(CXX) $(CXXFLAGS) $^ -o $@
+
+# Compilation rule for C files
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+# Compilation rule for C++ files
+%.o: %.cpp
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+# Clean rule
+clean:
+	rm -f $(TARGET) $(OBJ_FILES)
+

shaders/MVPTexNoRGBVert.glsl

@@ -0,0 +1,15 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec2 aTexCoord;
+
+out vec2 TexCoord;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    TexCoord = aTexCoord;
+}

shaders/MVPTexVert.glsl

@@ -0,0 +1,18 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+layout (location = 2) in vec2 aTexCoord;
+
+out vec3 ourColor;
+out vec2 TexCoord;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * view * model * vec4(aPos, 1.0);
+    ourColor = aColor;
+    TexCoord = aTexCoord;
+}

shaders/TexFrag.glsl

@@ -0,0 +1,12 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 ourColor;
+in vec2 TexCoord;
+
+uniform sampler2D tex0;
+
+void main()
+{
+    FragColor = texture(tex0, TexCoord) * vec4(ourColor, 1.0);
+}

shaders/TexNoRGBFrag.glsl

@@ -0,0 +1,12 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec3 ourColor;
+in vec2 TexCoord;
+
+uniform sampler2D tex0;
+
+void main()
+{
+    FragColor = texture(tex0, TexCoord);
+}

shaders/TexVert.glsl

@@ -0,0 +1,14 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+layout (location = 2) in vec2 aTexCoord;
+
+out vec3 ourColor;
+out vec2 TexCoord;
+
+void main()
+{
+    gl_Position = vec4(aPos, 1.0);
+    ourColor = aColor;
+    TexCoord = aTexCoord;
+}

shaders/lighting/Frag.glsl

@@ -0,0 +1,50 @@
+#version 330 core
+struct Material {
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+  float shininess;
+};
+
+
+struct Light {
+    vec3 position;
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+
+
+out vec4 FragColor;
+
+in vec3 FragPos;
+in vec3 Normal;
+
+uniform vec3 ourColor;
+uniform vec3 viewPos;
+uniform Material material;
+uniform Light light;
+
+void main()
+{
+  //misc
+  vec3 norm = normalize(Normal);
+  vec3 lightDir = normalize(light.position - FragPos);
+
+  // ambient
+  vec3 ambient = light.ambient * material.ambient;
+
+  // diffuse
+  float diff = max(dot(norm, lightDir), 0.0);
+  vec3 diffuse = light.diffuse * (diff * material.diffuse);
+
+  // specular
+  vec3 viewDir = normalize(viewPos - FragPos);
+  vec3 reflectDir = reflect(-lightDir, norm);
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
+  vec3 specular = light.specular * (spec * material.specular);
+
+  //out
+  vec3 result = ambient + diffuse + specular;
+  FragColor = vec4(result, 1.0);
+}

shaders/lighting/LightFrag.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+out vec4 FragColor;
+
+uniform vec3 ourColor;
+
+void main()
+{
+  FragColor = vec4(ourColor, 1.0);
+}

shaders/lighting/Vert.glsl

@@ -0,0 +1,18 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+
+out vec3 FragPos;
+out vec3 Normal;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+  gl_Position = projection * view * model * vec4(aPos, 1.0);
+  FragPos = vec3(model * vec4(aPos, 1.0));
+  Normal = aNormal;
+  //Normal = mat3(transpose(inverse(model))) * aNormal;//if non unifrom scale
+}

shaders/rgbPulseFrag.glsl

@@ -0,0 +1,8 @@
+#version 330 core
+out vec4 FragColor;
+in vec3 color;
+uniform float u_time;
+void main()
+{
+  FragColor = vec4(color,0.0)*(sin(u_time)/2.0+0.5);
+}

shaders/rgbPulseVert.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+out vec3 color;
+void main()
+{
+  color = aColor;
+  gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
+}

shell.nix

@@ -0,0 +1,15 @@
+{pkgs ? import <nixpkgs> {}}:
+with pkgs;
+  mkShell rec {
+    packages = [gdb clang-tools];
+    nativeBuildInputs = [
+      pkg-config
+      gcc
+      gnumake
+    ];
+    buildInputs = [
+      glfw3
+      glm
+    ];
+    LD_LIBRARY_PATH = lib.makeLibraryPath buildInputs;
+  }

src/camera.cpp

@@ -0,0 +1,59 @@
+#include <camera.hpp>
+#include <glm/ext/matrix_clip_space.hpp>
+#include <glm/ext/matrix_transform.hpp>
+
+Camera::Camera(glm::vec3 pos, float yaw, float pitch, float fov, float aspect)
+    : aspect(aspect), up(glm::vec3(0, 1, 0)), pos(pos), yaw(yaw), pitch(pitch),
+      fov(fov) {
+  update();
+}
+
+Camera::~Camera() {}
+
+void Camera::setRotate(float yaw, float pitch) {
+  this->yaw = yaw;
+  this->pitch = pitch;
+  update();
+}
+
+void Camera::addRotate(float yaw, float pitch) {
+  this->yaw += yaw;
+  this->pitch += pitch;
+  if (this->pitch > 89.0f)
+    this->pitch = 89.0f;
+  if (this->pitch < -89.0f)
+    this->pitch = -89.0f;
+  update();
+}
+
+void Camera::setPos(glm::vec3 pos) { this->pos = pos; }
+
+void Camera::addPos(glm::vec3 pos) { this->pos += pos; }
+
+void Camera::addFPos(glm::vec3 pos) {
+  glm::vec3 f = glm::normalize(glm::vec3(front.x, 0, front.z));
+  glm::vec3 r = glm::normalize(glm::cross(f, up));
+  this->pos += f * pos.x;
+  this->pos += up * pos.y;
+  this->pos += r * pos.z;
+}
+
+void Camera::update() {
+  glm::vec3 direction;
+  direction.x = cos(glm::radians(yaw)) * cos(glm::radians(pitch));
+  direction.y = sin(glm::radians(pitch));
+  direction.z = sin(glm::radians(yaw)) * cos(glm::radians(pitch));
+  front = glm::normalize(direction);
+}
+
+glm::mat4 Camera::getView() {
+  glm::mat4 view = glm::mat4(1.0f);
+  view = glm::lookAt(pos, pos + front, up);
+  return view;
+}
+
+glm::vec3 Camera::getPos() { return pos; }
+
+glm::mat4 Camera::getProjection() {
+  return glm::perspective(glm::radians(fov), aspect, 0.1f, 100.0f);
+}

src/main.cpp

@@ -0,0 +1,160 @@
+#include "camera.hpp"
+#include "glad/glad.h"
+#include <GLFW/glfw3.h>
+#include <cassert>
+#include <glm/glm.hpp>
+#include <mesh.hpp>
+#include <shader.hpp>
+#include <texture.hpp>
+
+#define UNUSED(x) (void)(x)
+
+glm::vec3 processInput(GLFWwindow *window);
+void framebuffer_size_callback(GLFWwindow *window, int width, int height);
+void mouse_callback(GLFWwindow *window, double xpos, double ypos);
+
+float deltaTime = 0;
+
+GLFWwindow *init() {
+  glfwInit();
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+  GLFWwindow *window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+  assert(window && "Window Failed");
+  glfwMakeContextCurrent(window);
+
+  int is_ok = 0;
+  is_ok = gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
+  assert(is_ok && "Failed to init glad");
+  glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+  glViewport(0, 0, 800, 600);
+  glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+  glfwSetCursorPosCallback(window, mouse_callback);
+  return window;
+}
+
+void showFPS(GLFWwindow *window, double delta) {
+  char title[22];
+  title[21] = '\0';
+  snprintf(title, 20, "OpenGl FPS: [%3.2f]", (1 / delta));
+  glfwSetWindowTitle(window, title);
+}
+
+int main(void) {
+  glm::vec3 lightPos = glm::vec3(1, 2.0f, 1);
+  glm::vec3 lightColor = glm::vec3(1);
+
+  GLFWwindow *window = init();
+  Camera *cam = new Camera(glm::vec3(0), 0, 0, 45, 800.0 / 600);
+  glfwSetWindowUserPointer(window, cam);
+
+  Shader *cubeShader = new Shader("./shaders/lighting/Vert.glsl",
+                                  "./shaders/lighting/Frag.glsl");
+  Shader *lightShader = new Shader("./shaders/lighting/Vert.glsl",
+                                   "./shaders/lighting/LightFrag.glsl");
+
+  Mesh *cube = new Mesh(cubeShader, "./cube.obj");
+  Mesh *light = new Mesh(lightShader, "./cube.obj");
+  cube->setOwnedShader(true);
+  light->setOwnedShader(true);
+
+  light->setPosition(lightPos);
+  light->setScale(glm::vec3(.3));
+
+  glEnable(GL_DEPTH_TEST);
+  float lastFrame = 0;
+  while (!glfwWindowShouldClose(window)) {
+    float currentFrame = (float)glfwGetTime();
+    deltaTime = currentFrame - lastFrame;
+    lastFrame = currentFrame;
+    showFPS(window, deltaTime);
+
+    glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    Shader *s = cube->getShader();
+    s->use();
+    s->setVec3("lightColor", lightColor);
+    s->setVec3("ourColor", glm::vec3(0.24725, 0.1995, 0.0745));
+    s->setVec3("lightPos", lightPos);
+    s->setVec3("viewPos", cam->getPos());
+
+    s->setVec3("light.ambient", glm::vec3(0.2));
+    s->setVec3("light.diffuse", glm::vec3(0.5));
+    s->setVec3("light.specular", glm::vec3(1));
+    s->setVec3("light.position", lightPos);
+
+    s->setVec3("material.ambient", glm::vec3(1.0, 0.5, 0.31));
+    s->setVec3("material.diffuse", glm::vec3(1.0, 0.5, 0.31));
+    s->setVec3("material.specular", glm::vec3(0.5));
+    s->setFloat("material.shininess", 32);
+    cube->draw(cam);
+
+    s = light->getShader();
+    s->use();
+    s->setVec3("ourColor", lightColor);
+    light->draw(cam);
+
+    glfwSwapBuffers(window);
+    glfwPollEvents();
+    glm::vec3 mov = processInput(window);
+    mov *= deltaTime;
+    cam->addFPos(mov);
+  }
+
+  delete cam;
+  delete cube;
+  delete light;
+  glfwTerminate();
+  return 0;
+}
+
+glm::vec3 processInput(GLFWwindow *window) {
+  glm::vec3 mov = glm::vec3(0);
+  if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+    glfwSetWindowShouldClose(window, true);
+
+  if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
+    mov += glm::vec3(1, 0, 0);
+  if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
+    mov -= glm::vec3(1, 0, 0);
+  if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
+    mov += glm::vec3(0, 0, 1);
+  if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
+    mov -= glm::vec3(0, 0, 1);
+  if (glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS)
+    mov += glm::vec3(0, 1, 0);
+  if (glfwGetKey(window, GLFW_KEY_E) == GLFW_PRESS)
+    mov -= glm::vec3(0, 1, 0);
+
+  mov *= 5;
+  return mov;
+}
+
+void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
+  UNUSED(window);
+  glViewport(0, 0, width, height);
+  Camera *cam = (Camera *)glfwGetWindowUserPointer(window);
+  if (cam)
+    cam->aspect = (float)width / height;
+}
+
+void mouse_callback(GLFWwindow *window, double xpos, double ypos) {
+  static float xprev = 0.0, yprev = 0.0;
+
+  float xchange = xpos - xprev;
+  float ychange = yprev - ypos;
+  xprev = xpos;
+  yprev = ypos;
+
+  float sensitivity = 0.1f;
+  xchange *= sensitivity;
+  ychange *= sensitivity;
+
+  Camera *cam = (Camera *)glfwGetWindowUserPointer(window);
+  if (cam)
+    cam->addRotate(xchange, ychange);
+}

src/mesh.cpp

@@ -0,0 +1,78 @@
+#include "camera.hpp"
+#include "obj.hpp"
+#include "shader.hpp"
+#include <mesh.hpp>
+#include <vector>
+
+unsigned int meshInit(std::string path, std::vector<float> &data);
+
+Mesh::Mesh(Shader *s, unsigned int VAO, int count)
+    : buffersOwned(false), shaderOwned(false), count(count), VAO(VAO),
+      shader(s), position(glm::vec3(0)), scale(glm::vec3(1)),
+      rotation(glm::quat(1.0f, 0.0f, 0.0f, 0.0f)) {}
+
+Mesh::Mesh(Shader *s, std::string path)
+    : buffersOwned(true), shaderOwned(false), shader(s), position(glm::vec3(0)),
+      scale(glm::vec3(1)), rotation(glm::quat(1.0f, 0.0f, 0.0f, 0.0f)) {
+  std::vector<float> data;
+  VAO = meshInit(path, data);
+  count = data.size() / 8;
+}
+
+Mesh::~Mesh() {
+  if (shaderOwned)
+    delete shader;
+  if (buffersOwned) {
+    glDeleteVertexArrays(1, &VAO);
+    // TODO vbo, ibo
+  }
+}
+
+void Mesh::draw(Camera *c) {
+  glm::mat4 model = glm::mat4(1);
+  glBindVertexArray(VAO);
+  shader->use();
+  shader->setMat4("view", c->getView());
+  shader->setMat4("projection", c->getProjection());
+  model = glm::translate(model, position);
+  model = glm::scale(model, scale);
+  model = model * glm::mat4_cast(rotation);
+  shader->setMat4("model", model);
+  glDrawArrays(GL_TRIANGLES, 0, count);
+}
+
+void Mesh::setPosition(glm::vec3 p) { position = p; }
+
+void Mesh::setScale(glm::vec3 s) { scale = s; }
+
+void Mesh::setRotation(glm::quat r) { rotation = r; }
+
+void Mesh::setOwnedBuffers(bool o) { buffersOwned = o; }
+
+void Mesh::setOwnedShader(bool o) { shaderOwned = o; }
+
+Shader *Mesh::getShader() { return shader; }
+
+unsigned int meshInit(std::string path, std::vector<float> &data) {
+  unsigned int VBO, VAO;
+  glGenVertexArrays(1, &VAO);
+  glBindVertexArray(VAO);
+
+  glGenBuffers(1, &VBO);
+  glBindBuffer(GL_ARRAY_BUFFER, VBO);
+
+  loadOBJ(path.c_str(), &data);
+  glBufferData(GL_ARRAY_BUFFER, data.size() * sizeof(float), data.data(),
+               GL_STATIC_DRAW);
+  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void *)0);
+  glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float),
+                        (void *)(3 * sizeof(float)));
+  glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float),
+                        (void *)(6 * sizeof(float)));
+
+  glEnableVertexAttribArray(0);
+  glEnableVertexAttribArray(1);
+  glEnableVertexAttribArray(2); // not in use
+  glBindVertexArray(0);
+  return VAO;
+}

src/obj.cpp

@@ -0,0 +1,66 @@
+#include "obj.hpp"
+#include <cassert>
+#include <cstddef>
+#include <cstdio>
+#include <cstring>
+
+/*this is ugly but works*/
+unsigned int loadOBJ(const char *path, std::vector<float> *out_vertices) {
+  std::vector<glm::vec3> verts, norms;
+  std::vector<glm::vec2> uvs;
+
+  FILE *file = fopen(path, "r");
+  assert(file && "file not found");
+
+  int tmp = 0;
+  while (1) {
+    char lineHeader[128];
+    int res = fscanf(file, "%s", lineHeader);
+    if (res == EOF)
+      break;
+    if (strcmp(lineHeader, "v") == 0) {
+      glm::vec3 vert;
+      tmp = fscanf(file, "%f %f %f\n", &vert.x, &vert.y, &vert.z);
+      assert(tmp == 3 && "bad vert");
+      verts.push_back(vert);
+    } else if (strcmp(lineHeader, "vt") == 0) {
+      glm::vec2 uv;
+      tmp = fscanf(file, "%f %f\n", &uv.x, &uv.y);
+      assert(tmp == 2 && "bad uv");
+      uvs.push_back(uv);
+    } else if (strcmp(lineHeader, "vn") == 0) {
+      glm::vec3 norm;
+      tmp = fscanf(file, "%f %f %f\n", &norm.x, &norm.y, &norm.z);
+      assert(tmp == 3 && "bad norm");
+      norms.push_back(norm);
+    } else if (strcmp(lineHeader, "f") == 0) {
+      unsigned int vIndex[3], uvIndex[3], nIndex[3];
+      tmp = fscanf(file, "%d/%d/%d %d/%d/%d %d/%d/%d\n", &vIndex[0],
+                   &uvIndex[0], &nIndex[0], &vIndex[1], &uvIndex[1], &nIndex[1],
+                   &vIndex[2], &uvIndex[2], &nIndex[2]);
+      assert(tmp == 9 && "bad face");
+
+      for (size_t i = 0; i < 3; ++i) {
+        size_t vi, ni, ui;
+        vi = (vIndex[i] - 1);
+        ni = (nIndex[i] - 1);
+        ui = (uvIndex[i] - 1);
+        assert(verts.size() > vi);
+        assert(norms.size() > ni);
+        assert(uvs.size() > ui);
+        auto vert = verts[vi];
+        auto norm = norms[ni];
+        auto uv = uvs[ui];
+        out_vertices->push_back(vert.x);
+        out_vertices->push_back(vert.y);
+        out_vertices->push_back(vert.z);
+        out_vertices->push_back(norm.x);
+        out_vertices->push_back(norm.y);
+        out_vertices->push_back(norm.z);
+        out_vertices->push_back(uv.x);
+        out_vertices->push_back(uv.y);
+      }
+    }
+  }
+  return verts.size();
+}

src/shader.cpp

@@ -0,0 +1,110 @@
+#include <fstream>
+#include <glad/glad.h>
+#include <glm/gtc/type_ptr.hpp>
+#include <iostream>
+#include <shader.hpp>
+#include <sstream>
+#include <string>
+
+/*pub*/
+Shader::Shader(const char *vertexPath, const char *fragmentPath) {
+  std::string vertexCode, fragmentCode;
+  std::ifstream vShaderFile, fShaderFile;
+
+  vShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+  fShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+  try {
+    vShaderFile.open(vertexPath);
+    fShaderFile.open(fragmentPath);
+    std::stringstream vShaderStream, fShaderStream;
+
+    vShaderStream << vShaderFile.rdbuf();
+    fShaderStream << fShaderFile.rdbuf();
+
+    vShaderFile.close();
+    fShaderFile.close();
+
+    vertexCode = vShaderStream.str();
+    fragmentCode = fShaderStream.str();
+  } catch (std::ifstream::failure &e) {
+    std::cout << "ERROR::SHADER::FILE_NOT_SUCCESSFULLY_READ: " << e.what()
+              << std::endl;
+  }
+  this->ID = shaderProgramCMPL(vertexCode.c_str(), fragmentCode.c_str());
+}
+
+Shader::~Shader() { glDeleteProgram(ID); }
+
+void Shader::use() { glUseProgram(ID); }
+
+void Shader::setInt(const std::string &name, int value) {
+  glUniform1i(glGetUniformLocation(ID, name.c_str()), value);
+}
+
+void Shader::setFloat(const std::string &name, float value) {
+  glUniform1f(glGetUniformLocation(ID, name.c_str()), value);
+}
+
+void Shader::setVec3(const std::string &name, glm::vec3 value) {
+  glUniform3fv(glGetUniformLocation(ID, name.c_str()), 1,
+               glm::value_ptr(value));
+}
+
+void Shader::setMat4(const std::string &name, glm::mat4 value) {
+  glUniformMatrix4fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE,
+                     glm::value_ptr(value));
+}
+
+/*priv*/
+unsigned int Shader::shaderCMPL(GLenum type, const char *src) {
+  unsigned int shader;
+  shader = glCreateShader(type);
+  glShaderSource(shader, 1, &src, NULL);
+  glCompileShader(shader);
+  return shader;
+}
+
+void Shader::shaderERR(unsigned int shader) {
+  int success;
+  char infoLog[512];
+  glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+
+  if (!success) {
+    glGetShaderInfoLog(shader, 512, NULL, infoLog);
+    std::cout << "ERROR::SHADER::COMPILATION_FAILED\n" << infoLog << std::endl;
+  }
+}
+
+unsigned int Shader::shaderProgramCMPL(const char *vertexSource,
+                                       const char *fragmentSource) {
+  unsigned int vertexShader;
+  vertexShader = shaderCMPL(GL_VERTEX_SHADER, vertexSource);
+  shaderERR(vertexShader);
+
+  unsigned int fragmentShader;
+  fragmentShader = shaderCMPL(GL_FRAGMENT_SHADER, fragmentSource);
+  shaderERR(fragmentShader);
+
+  unsigned int shaderProgram;
+  shaderProgram = glCreateProgram();
+
+  glAttachShader(shaderProgram, vertexShader);
+  glAttachShader(shaderProgram, fragmentShader);
+  glLinkProgram(shaderProgram);
+  shaderProgramERR(shaderProgram);
+  glDeleteShader(vertexShader);
+  glDeleteShader(fragmentShader);
+
+  return shaderProgram;
+}
+
+void Shader::shaderProgramERR(unsigned int shaderProgram) {
+  int success;
+  char infoLog[512];
+  glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
+
+  if (!success) {
+    glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+    std::cout << "ERROR::SHADER::PROGRAM::FAILED\n" << infoLog << std::endl;
+  }
+}

src/stb_images.c

@@ -0,0 +1,2 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"

src/texture.cpp

@@ -0,0 +1,33 @@
+#include <cassert>
+#include <stb_image.h>
+#include <texture.hpp>
+
+Texture::Texture(GLenum type, const char *path) : type(type) {
+  glGenTextures(1, &ID);
+  glBindTexture(type, ID);
+
+  glTexParameteri(type, GL_TEXTURE_WRAP_S, GL_REPEAT);
+  glTexParameteri(type, GL_TEXTURE_WRAP_T, GL_REPEAT);
+  glTexParameteri(type, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  glTexParameteri(type, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+
+  int width, height, nrChannels;
+  unsigned char *data;
+  stbi_set_flip_vertically_on_load(true);
+
+  data = stbi_load(path, &width, &height, &nrChannels, 0);
+  assert(data && "Failed to load image");
+
+  glTexImage2D(type, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE,
+               data);
+  glGenerateMipmap(type);
+
+  stbi_image_free(data);
+};
+
+Texture::~Texture() {glDeleteTextures(1, &ID);}
+
+void Texture::bind(GLenum texture) {
+  glActiveTexture(texture);
+  glBindTexture(type, ID);
+}