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examples/others/iqm_loader/models_iqm_animation.c

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+/*******************************************************************************************
+*
+*   raylib [models] example - Load IQM 3d model with animations and play them
+*
+*   This example has been created using raylib 2.0 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2018 @culacant and @raysan5
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define RIQM_IMPLEMENTATION
+#include "riqm.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - iqm animation");
+
+    // Define the camera to look into our 3d world
+    Camera camera = { 0 };
+    camera.position = (Vector3){ 10.0f, 10.0f, 10.0f }; // Camera position
+    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };      // Camera looking at point
+    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                // Camera field-of-view Y
+    camera.type = CAMERA_PERSPECTIVE;                   // Camera mode type
+    
+    // Load the animated model mesh and basic data
+    AnimatedModel model = LoadAnimatedModel("resources/guy.iqm");
+    
+    // Load model texture and set material
+    // NOTE: There is only 1 mesh and 1 material (both at index 0), thats what the 2 0's are
+    model = AnimatedModelAddTexture(model, "resources/guytex.png");   // REPLACE!
+    model = SetMeshMaterial(model, 0, 0);                             // REPLACE!
+    
+    // Load animation data
+    Animation anim = LoadAnimationFromIQM("resources/guyanim.iqm");
+    
+    int animFrameCounter = 0;
+
+    SetCameraMode(camera, CAMERA_FREE);  // Set free camera mode
+
+    SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        UpdateCamera(&camera);
+        
+        // Play animation when spacebar is held down
+        if (IsKeyDown(KEY_SPACE))
+        {
+            animFrameCounter++;
+            AnimateModel(model, anim, animFrameCounter); // Animate the model with animation data and frame
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+        
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+
+                DrawAnimatedModel(model, Vector3Zero(), 1.0f, WHITE);  // Draw animated model
+                
+                DrawGrid(10, 1.0f);         // Draw a grid
+
+            EndMode3D();
+            
+            DrawText("(c) Guy IQM 3D model by -------", screenWidth - 200, screenHeight - 20, 10, GRAY);
+
+            DrawFPS(10, 10);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadAnimation(anim);      // Unload animation data
+    UnloadAnimatedModel(model); // Unload animated model
+
+    CloseWindow();              // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

examples/others/iqm_loader/rlgl.h

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+/**********************************************************************************************
+*
+*   rlgl - raylib OpenGL abstraction layer
+*
+*   rlgl is a wrapper for multiple OpenGL versions (1.1, 2.1, 3.3 Core, ES 2.0) to
+*   pseudo-OpenGL 1.1 style functions (rlVertex, rlTranslate, rlRotate...).
+*
+*   When chosing an OpenGL version greater than OpenGL 1.1, rlgl stores vertex data on internal
+*   VBO buffers (and VAOs if available). It requires calling 3 functions:
+*       rlglInit()  - Initialize internal buffers and auxiliar resources
+*       rlglDraw()  - Process internal buffers and send required draw calls
+*       rlglClose() - De-initialize internal buffers data and other auxiliar resources
+*
+*   CONFIGURATION:
+*
+*   #define GRAPHICS_API_OPENGL_11
+*   #define GRAPHICS_API_OPENGL_21
+*   #define GRAPHICS_API_OPENGL_33
+*   #define GRAPHICS_API_OPENGL_ES2
+*       Use selected OpenGL graphics backend, should be supported by platform
+*       Those preprocessor defines are only used on rlgl module, if OpenGL version is
+*       required by any other module, use rlGetVersion() tocheck it
+*
+*   #define RLGL_STANDALONE
+*       Use rlgl as standalone library (no raylib dependency)
+*
+*   #define SUPPORT_VR_SIMULATOR
+*       Support VR simulation functionality (stereo rendering)
+*
+*   #define SUPPORT_DISTORTION_SHADER
+*       Include stereo rendering distortion shader (shader_distortion.h)
+*
+*   DEPENDENCIES:
+*       raymath     - 3D math functionality (Vector3, Matrix, Quaternion)
+*       GLAD        - OpenGL extensions loading (OpenGL 3.3 Core only)
+*
+*
+*   LICENSE: zlib/libpng
+*
+*   Copyright (c) 2014-2017 Ramon Santamaria (@raysan5)
+*
+*   This software is provided "as-is", without any express or implied warranty. In no event
+*   will the authors be held liable for any damages arising from the use of this software.
+*
+*   Permission is granted to anyone to use this software for any purpose, including commercial
+*   applications, and to alter it and redistribute it freely, subject to the following restrictions:
+*
+*     1. The origin of this software must not be misrepresented; you must not claim that you
+*     wrote the original software. If you use this software in a product, an acknowledgment
+*     in the product documentation would be appreciated but is not required.
+*
+*     2. Altered source versions must be plainly marked as such, and must not be misrepresented
+*     as being the original software.
+*
+*     3. This notice may not be removed or altered from any source distribution.
+*
+**********************************************************************************************/
+
+#ifndef RLGL_H
+#define RLGL_H
+
+#if defined(RLGL_STANDALONE)
+    #define RAYMATH_STANDALONE
+#else
+    #include "raylib.h"         // Required for: Model, Shader, Texture2D, TraceLog()
+#endif
+
+#include "raymath.h"            // Required for: Vector3, Matrix
+
+// Security check in case no GRAPHICS_API_OPENGL_* defined
+#if !defined(GRAPHICS_API_OPENGL_11) && !defined(GRAPHICS_API_OPENGL_21) && !defined(GRAPHICS_API_OPENGL_33) && !defined(GRAPHICS_API_OPENGL_ES2)
+    #define GRAPHICS_API_OPENGL_11
+#endif
+
+// Security check in case multiple GRAPHICS_API_OPENGL_* defined
+#if defined(GRAPHICS_API_OPENGL_11)
+    #if defined(GRAPHICS_API_OPENGL_21)
+        #undef GRAPHICS_API_OPENGL_21
+    #endif
+    #if defined(GRAPHICS_API_OPENGL_33)
+        #undef GRAPHICS_API_OPENGL_33
+    #endif
+    #if defined(GRAPHICS_API_OPENGL_ES2)
+        #undef GRAPHICS_API_OPENGL_ES2
+    #endif
+#endif
+
+#if defined(GRAPHICS_API_OPENGL_21)
+    #define GRAPHICS_API_OPENGL_33
+#endif
+
+//----------------------------------------------------------------------------------
+// Defines and Macros
+//----------------------------------------------------------------------------------
+#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
+    // NOTE: This is the maximum amount of lines, triangles and quads per frame, be careful!
+    #define MAX_LINES_BATCH         8192
+    #define MAX_TRIANGLES_BATCH     4096
+    #define MAX_QUADS_BATCH         8192
+#elif defined(GRAPHICS_API_OPENGL_ES2)
+    // NOTE: Reduce memory sizes for embedded systems (RPI and HTML5)
+    // NOTE: On HTML5 (emscripten) this is allocated on heap, by default it's only 16MB!...just take care...
+    #define MAX_LINES_BATCH         1024    // Critical for wire shapes (sphere)
+    #define MAX_TRIANGLES_BATCH     2048    // Critical for some shapes (sphere)
+    #define MAX_QUADS_BATCH         1024    // Be careful with text, every letter maps a quad
+#endif
+
+// Texture parameters (equivalent to OpenGL defines)
+#define RL_TEXTURE_WRAP_S               0x2802      // GL_TEXTURE_WRAP_S
+#define RL_TEXTURE_WRAP_T               0x2803      // GL_TEXTURE_WRAP_T
+#define RL_TEXTURE_MAG_FILTER           0x2800      // GL_TEXTURE_MAG_FILTER
+#define RL_TEXTURE_MIN_FILTER           0x2801      // GL_TEXTURE_MIN_FILTER
+#define RL_TEXTURE_ANISOTROPIC_FILTER   0x3000      // Anisotropic filter (custom identifier)
+
+#define RL_FILTER_NEAREST               0x2600      // GL_NEAREST
+#define RL_FILTER_LINEAR                0x2601      // GL_LINEAR
+#define RL_FILTER_MIP_NEAREST           0x2700      // GL_NEAREST_MIPMAP_NEAREST
+#define RL_FILTER_NEAREST_MIP_LINEAR    0x2702      // GL_NEAREST_MIPMAP_LINEAR
+#define RL_FILTER_LINEAR_MIP_NEAREST    0x2701      // GL_LINEAR_MIPMAP_NEAREST
+#define RL_FILTER_MIP_LINEAR            0x2703      // GL_LINEAR_MIPMAP_LINEAR
+
+#define RL_WRAP_REPEAT                  0x2901      // GL_REPEAT
+#define RL_WRAP_CLAMP                   0x812F      // GL_CLAMP_TO_EDGE
+#define RL_WRAP_CLAMP_MIRROR            0x8742      // GL_MIRROR_CLAMP_EXT
+
+// Matrix modes (equivalent to OpenGL)
+#define RL_MODELVIEW                    0x1700      // GL_MODELVIEW
+#define RL_PROJECTION                   0x1701      // GL_PROJECTION
+#define RL_TEXTURE                      0x1702      // GL_TEXTURE
+
+// Primitive assembly draw modes
+#define RL_LINES                        0x0001      // GL_LINES
+#define RL_TRIANGLES                    0x0004      // GL_TRIANGLES
+#define RL_QUADS                        0x0007      // GL_QUADS
+
+//----------------------------------------------------------------------------------
+// Types and Structures Definition
+//----------------------------------------------------------------------------------
+typedef enum { OPENGL_11 = 1, OPENGL_21, OPENGL_33, OPENGL_ES_20 } GlVersion;
+
+typedef unsigned char byte;
+
+#if defined(RLGL_STANDALONE)
+    #ifndef __cplusplus
+    // Boolean type
+    typedef enum { false, true } bool;
+    #endif
+
+    // Color type, RGBA (32bit)
+    typedef struct Color {
+        unsigned char r;
+        unsigned char g;
+        unsigned char b;
+        unsigned char a;
+    } Color;
+
+    // Rectangle type
+    typedef struct Rectangle {
+        int x;
+        int y;
+        int width;
+        int height;
+    } Rectangle;
+
+    // Texture2D type
+    // NOTE: Data stored in GPU memory
+    typedef struct Texture2D {
+        unsigned int id;        // OpenGL texture id
+        int width;              // Texture base width
+        int height;             // Texture base height
+        int mipmaps;            // Mipmap levels, 1 by default
+        int format;             // Data format (PixelFormat)
+    } Texture2D;
+
+    // RenderTexture2D type, for texture rendering
+    typedef struct RenderTexture2D {
+        unsigned int id;        // Render texture (fbo) id
+        Texture2D texture;      // Color buffer attachment texture
+        Texture2D depth;        // Depth buffer attachment texture
+    } RenderTexture2D;
+
+    // Vertex data definning a mesh
+    typedef struct Mesh {
+        int vertexCount;        // number of vertices stored in arrays
+        int triangleCount;      // number of triangles stored (indexed or not)
+        float *vertices;        // vertex position (XYZ - 3 components per vertex) (shader-location = 0)
+        float *texcoords;       // vertex texture coordinates (UV - 2 components per vertex) (shader-location = 1)
+        float *texcoords2;      // vertex second texture coordinates (useful for lightmaps) (shader-location = 5)
+        float *normals;         // vertex normals (XYZ - 3 components per vertex) (shader-location = 2)
+        float *tangents;        // vertex tangents (XYZW - 4 components per vertex) (shader-location = 4)
+        unsigned char *colors;  // vertex colors (RGBA - 4 components per vertex) (shader-location = 3)
+        unsigned short *indices;// vertex indices (in case vertex data comes indexed)
+
+        unsigned int vaoId;     // OpenGL Vertex Array Object id
+        unsigned int vboId[7];  // OpenGL Vertex Buffer Objects id (7 types of vertex data)
+    } Mesh;
+
+    // Shader and material limits
+    #define MAX_SHADER_LOCATIONS    32
+    #define MAX_MATERIAL_MAPS       12
+
+    // Shader type (generic)
+    typedef struct Shader {
+        unsigned int id;                // Shader program id
+        int locs[MAX_SHADER_LOCATIONS]; // Shader locations array
+    } Shader;
+
+    // Material texture map
+    typedef struct MaterialMap {
+        Texture2D texture;      // Material map texture
+        Color color;            // Material map color
+        float value;            // Material map value
+    } MaterialMap;
+
+    // Material type (generic)
+    typedef struct Material {
+        Shader shader;          // Material shader
+        MaterialMap maps[MAX_MATERIAL_MAPS]; // Material maps
+        float *params;          // Material generic parameters (if required)
+    } Material;
+
+    // Camera type, defines a camera position/orientation in 3d space
+    typedef struct Camera {
+        Vector3 position;       // Camera position
+        Vector3 target;         // Camera target it looks-at
+        Vector3 up;             // Camera up vector (rotation over its axis)
+        float fovy;             // Camera field-of-view apperture in Y (degrees)
+    } Camera;
+
+    // Head-Mounted-Display device parameters
+    typedef struct VrDeviceInfo {
+        int hResolution;                // HMD horizontal resolution in pixels
+        int vResolution;                // HMD vertical resolution in pixels
+        float hScreenSize;              // HMD horizontal size in meters
+        float vScreenSize;              // HMD vertical size in meters
+        float vScreenCenter;            // HMD screen center in meters
+        float eyeToScreenDistance;      // HMD distance between eye and display in meters
+        float lensSeparationDistance;   // HMD lens separation distance in meters
+        float interpupillaryDistance;   // HMD IPD (distance between pupils) in meters
+        float lensDistortionValues[4];  // HMD lens distortion constant parameters
+        float chromaAbCorrection[4];    // HMD chromatic aberration correction parameters
+    } VrDeviceInfo;
+
+    // TraceLog message types
+    typedef enum {
+        LOG_INFO = 0,
+        LOG_ERROR,
+        LOG_WARNING,
+        LOG_DEBUG,
+        LOG_OTHER
+    } TraceLogType;
+
+    // Texture formats (support depends on OpenGL version)
+    typedef enum {
+        UNCOMPRESSED_GRAYSCALE = 1,     // 8 bit per pixel (no alpha)
+        UNCOMPRESSED_GRAY_ALPHA,
+        UNCOMPRESSED_R5G6B5,            // 16 bpp
+        UNCOMPRESSED_R8G8B8,            // 24 bpp
+        UNCOMPRESSED_R5G5B5A1,          // 16 bpp (1 bit alpha)
+        UNCOMPRESSED_R4G4B4A4,          // 16 bpp (4 bit alpha)
+        UNCOMPRESSED_R8G8B8A8,          // 32 bpp
+        UNCOMPRESSED_R32,               // 32 bpp (1 channel - float)
+        UNCOMPRESSED_R32G32B32,         // 32*3 bpp (3 channels - float)
+        UNCOMPRESSED_R32G32B32A32,      // 32*4 bpp (4 channels - float)
+        COMPRESSED_DXT1_RGB,            // 4 bpp (no alpha)
+        COMPRESSED_DXT1_RGBA,           // 4 bpp (1 bit alpha)
+        COMPRESSED_DXT3_RGBA,           // 8 bpp
+        COMPRESSED_DXT5_RGBA,           // 8 bpp
+        COMPRESSED_ETC1_RGB,            // 4 bpp
+        COMPRESSED_ETC2_RGB,            // 4 bpp
+        COMPRESSED_ETC2_EAC_RGBA,       // 8 bpp
+        COMPRESSED_PVRT_RGB,            // 4 bpp
+        COMPRESSED_PVRT_RGBA,           // 4 bpp
+        COMPRESSED_ASTC_4x4_RGBA,       // 8 bpp
+        COMPRESSED_ASTC_8x8_RGBA        // 2 bpp
+    } PixelFormat;
+
+    // Texture parameters: filter mode
+    // NOTE 1: Filtering considers mipmaps if available in the texture
+    // NOTE 2: Filter is accordingly set for minification and magnification
+    typedef enum {
+        FILTER_POINT = 0,               // No filter, just pixel aproximation
+        FILTER_BILINEAR,                // Linear filtering
+        FILTER_TRILINEAR,               // Trilinear filtering (linear with mipmaps)
+        FILTER_ANISOTROPIC_4X,          // Anisotropic filtering 4x
+        FILTER_ANISOTROPIC_8X,          // Anisotropic filtering 8x
+        FILTER_ANISOTROPIC_16X,         // Anisotropic filtering 16x
+    } TextureFilterMode;
+
+    // Texture parameters: wrap mode
+    typedef enum {
+        WRAP_REPEAT = 0,
+        WRAP_CLAMP,
+        WRAP_MIRROR
+    } TextureWrapMode;
+
+    // Color blending modes (pre-defined)
+    typedef enum {
+        BLEND_ALPHA = 0,
+        BLEND_ADDITIVE,
+        BLEND_MULTIPLIED
+    } BlendMode;
+
+    // Shader location point type
+    typedef enum {
+        LOC_VERTEX_POSITION = 0,
+        LOC_VERTEX_TEXCOORD01,
+        LOC_VERTEX_TEXCOORD02,
+        LOC_VERTEX_NORMAL,
+        LOC_VERTEX_TANGENT,
+        LOC_VERTEX_COLOR,
+        LOC_MATRIX_MVP,
+        LOC_MATRIX_MODEL,
+        LOC_MATRIX_VIEW,
+        LOC_MATRIX_PROJECTION,
+        LOC_VECTOR_VIEW,
+        LOC_COLOR_DIFFUSE,
+        LOC_COLOR_SPECULAR,
+        LOC_COLOR_AMBIENT,
+        LOC_MAP_ALBEDO,          // LOC_MAP_DIFFUSE
+        LOC_MAP_METALNESS,       // LOC_MAP_SPECULAR
+        LOC_MAP_NORMAL,
+        LOC_MAP_ROUGHNESS,
+        LOC_MAP_OCCLUSION,
+        LOC_MAP_EMISSION,
+        LOC_MAP_HEIGHT,
+        LOC_MAP_CUBEMAP,
+        LOC_MAP_IRRADIANCE,
+        LOC_MAP_PREFILTER,
+        LOC_MAP_BRDF
+    } ShaderLocationIndex;
+
+    #define LOC_MAP_DIFFUSE      LOC_MAP_ALBEDO
+    #define LOC_MAP_SPECULAR     LOC_MAP_METALNESS
+
+    // Material map type
+    typedef enum {
+        MAP_ALBEDO    = 0,       // MAP_DIFFUSE
+        MAP_METALNESS = 1,       // MAP_SPECULAR
+        MAP_NORMAL    = 2,
+        MAP_ROUGHNESS = 3,
+        MAP_OCCLUSION,
+        MAP_EMISSION,
+        MAP_HEIGHT,
+        MAP_CUBEMAP,             // NOTE: Uses GL_TEXTURE_CUBE_MAP
+        MAP_IRRADIANCE,          // NOTE: Uses GL_TEXTURE_CUBE_MAP
+        MAP_PREFILTER,           // NOTE: Uses GL_TEXTURE_CUBE_MAP
+        MAP_BRDF
+    } TexmapIndex;
+
+    #define MAP_DIFFUSE      MAP_ALBEDO
+    #define MAP_SPECULAR     MAP_METALNESS
+
+    // VR Head Mounted Display devices
+    typedef enum {
+        HMD_DEFAULT_DEVICE = 0,
+        HMD_OCULUS_RIFT_DK2,
+        HMD_OCULUS_RIFT_CV1,
+        HMD_OCULUS_GO,
+        HMD_VALVE_HTC_VIVE,
+        HMD_SONY_PSVR
+    } VrDevice;
+#endif
+
+#ifdef __cplusplus
+extern "C" {            // Prevents name mangling of functions
+#endif
+
+//------------------------------------------------------------------------------------
+// Functions Declaration - Matrix operations
+//------------------------------------------------------------------------------------
+void rlMatrixMode(int mode);                    // Choose the current matrix to be transformed
+void rlPushMatrix(void);                        // Push the current matrix to stack
+void rlPopMatrix(void);                         // Pop lattest inserted matrix from stack
+void rlLoadIdentity(void);                      // Reset current matrix to identity matrix
+void rlTranslatef(float x, float y, float z);   // Multiply the current matrix by a translation matrix
+void rlRotatef(float angleDeg, float x, float y, float z);  // Multiply the current matrix by a rotation matrix
+void rlScalef(float x, float y, float z);       // Multiply the current matrix by a scaling matrix
+void rlMultMatrixf(float *matf);                // Multiply the current matrix by another matrix
+void rlFrustum(double left, double right, double bottom, double top, double near, double far);
+void rlOrtho(double left, double right, double bottom, double top, double near, double far);
+void rlViewport(int x, int y, int width, int height); // Set the viewport area
+
+//------------------------------------------------------------------------------------
+// Functions Declaration - Vertex level operations
+//------------------------------------------------------------------------------------
+void rlBegin(int mode);                         // Initialize drawing mode (how to organize vertex)
+void rlEnd(void);                               // Finish vertex providing
+void rlVertex2i(int x, int y);                  // Define one vertex (position) - 2 int
+void rlVertex2f(float x, float y);              // Define one vertex (position) - 2 float
+void rlVertex3f(float x, float y, float z);     // Define one vertex (position) - 3 float
+void rlTexCoord2f(float x, float y);            // Define one vertex (texture coordinate) - 2 float
+void rlNormal3f(float x, float y, float z);     // Define one vertex (normal) - 3 float
+void rlColor4ub(byte r, byte g, byte b, byte a);    // Define one vertex (color) - 4 byte
+void rlColor3f(float x, float y, float z);          // Define one vertex (color) - 3 float
+void rlColor4f(float x, float y, float z, float w); // Define one vertex (color) - 4 float
+
+//------------------------------------------------------------------------------------
+// Functions Declaration - OpenGL equivalent functions (common to 1.1, 3.3+, ES2)
+// NOTE: This functions are used to completely abstract raylib code from OpenGL layer
+//------------------------------------------------------------------------------------
+void rlEnableTexture(unsigned int id);                  // Enable texture usage
+void rlDisableTexture(void);                            // Disable texture usage
+void rlTextureParameters(unsigned int id, int param, int value); // Set texture parameters (filter, wrap)
+void rlEnableRenderTexture(unsigned int id);            // Enable render texture (fbo)
+void rlDisableRenderTexture(void);                      // Disable render texture (fbo), return to default framebuffer
+void rlEnableDepthTest(void);                           // Enable depth test
+void rlDisableDepthTest(void);                          // Disable depth test
+void rlEnableWireMode(void);                            // Enable wire mode
+void rlDisableWireMode(void);                           // Disable wire mode
+void rlDeleteTextures(unsigned int id);                 // Delete OpenGL texture from GPU
+void rlDeleteRenderTextures(RenderTexture2D target);    // Delete render textures (fbo) from GPU
+void rlDeleteShader(unsigned int id);                   // Delete OpenGL shader program from GPU
+void rlDeleteVertexArrays(unsigned int id);             // Unload vertex data (VAO) from GPU memory
+void rlDeleteBuffers(unsigned int id);                  // Unload vertex data (VBO) from GPU memory
+void rlClearColor(byte r, byte g, byte b, byte a);      // Clear color buffer with color
+void rlClearScreenBuffers(void);                        // Clear used screen buffers (color and depth)
+
+//------------------------------------------------------------------------------------
+// Functions Declaration - rlgl functionality
+//------------------------------------------------------------------------------------
+void rlglInit(int width, int height);           // Initialize rlgl (buffers, shaders, textures, states)
+void rlglClose(void);                           // De-inititialize rlgl (buffers, shaders, textures)
+void rlglDraw(void);                            // Update and Draw default buffers (lines, triangles, quads)
+
+int rlGetVersion(void);                         // Returns current OpenGL version
+bool rlCheckBufferLimit(int type, int vCount);  // Check internal buffer overflow for a given number of vertex
+void rlSetDebugMarker(const char *text);        // Set debug marker for analysis
+void rlLoadExtensions(void *loader);            // Load OpenGL extensions
+Vector3 rlUnproject(Vector3 source, Matrix proj, Matrix view);  // Get world coordinates from screen coordinates
+
+// Textures data management
+unsigned int rlLoadTexture(void *data, int width, int height, int format, int mipmapCount);    // Load texture in GPU
+void rlUpdateTexture(unsigned int id, int width, int height, int format, const void *data);    // Update GPU texture with new data
+void rlUnloadTexture(unsigned int id);
+void rlGenerateMipmaps(Texture2D *texture);                         // Generate mipmap data for selected texture
+void *rlReadTexturePixels(Texture2D texture);                       // Read texture pixel data
+unsigned char *rlReadScreenPixels(int width, int height);           // Read screen pixel data (color buffer)
+RenderTexture2D rlLoadRenderTexture(int width, int height);         // Load a texture to be used for rendering (fbo with color and depth attachments)
+
+// Vertex data management
+void rlLoadMesh(Mesh *mesh, bool dynamic);                          // Upload vertex data into GPU and provided VAO/VBO ids
+void rlUpdateMesh(Mesh mesh, int buffer, int numVertex);            // Update vertex data on GPU (upload new data to one buffer)
+void rlDrawMesh(Mesh mesh, Material material, Matrix transform);    // Draw a 3d mesh with material and transform
+void rlUnloadMesh(Mesh *mesh);                                      // Unload mesh data from CPU and GPU
+
+// NOTE: There is a set of shader related functions that are available to end user,
+// to avoid creating function wrappers through core module, they have been directly declared in raylib.h
+
+#if defined(RLGL_STANDALONE)
+//------------------------------------------------------------------------------------
+// Shaders System Functions (Module: rlgl)
+// NOTE: This functions are useless when using OpenGL 1.1
+//------------------------------------------------------------------------------------
+Shader LoadShader(char *vsFileName, char *fsFileName);  // Load a custom shader and bind default locations
+void UnloadShader(Shader shader);                       // Unload a custom shader from memory
+
+Shader GetShaderDefault(void);                          // Get default shader
+Texture2D GetTextureDefault(void);                      // Get default texture
+
+// Shader configuration functions
+int GetShaderLocation(Shader shader, const char *uniformName);              // Get shader uniform location
+void SetShaderValue(Shader shader, int uniformLoc, const float *value, int size); // Set shader uniform value (float)
+void SetShaderValuei(Shader shader, int uniformLoc, const int *value, int size);  // Set shader uniform value (int)
+void SetShaderValueMatrix(Shader shader, int uniformLoc, Matrix mat);       // Set shader uniform value (matrix 4x4)
+void SetMatrixProjection(Matrix proj);                  // Set a custom projection matrix (replaces internal projection matrix)
+void SetMatrixModelview(Matrix view);                   // Set a custom modelview matrix (replaces internal modelview matrix)
+Matrix GetMatrixModelview();                            // Get internal modelview matrix
+
+
+// Texture maps generation (PBR)
+// NOTE: Required shaders should be provided
+Texture2D GenTextureCubemap(Shader shader, Texture2D skyHDR, int size);     // Generate cubemap texture from HDR texture
+Texture2D GenTextureIrradiance(Shader shader, Texture2D cubemap, int size); // Generate irradiance texture using cubemap data
+Texture2D GenTexturePrefilter(Shader shader, Texture2D cubemap, int size);  // Generate prefilter texture using cubemap data
+Texture2D GenTextureBRDF(Shader shader, Texture2D cubemap, int size);       // Generate BRDF texture using cubemap data
+
+// Shading and blending
+void BeginShaderMode(Shader shader);                    // Begin custom shader drawing
+void EndShaderMode(void);                               // End custom shader drawing (use default shader)
+void BeginBlendMode(int mode);                          // Begin blending mode (alpha, additive, multiplied)
+void EndBlendMode(void);                                // End blending mode (reset to default: alpha blending)
+
+// VR simulator functionality
+VrDeviceInfo GetVrDeviceInfo(int vrDeviceType);         // Get VR device information for some standard devices
+void InitVrSimulator(VrDeviceInfo info);                // Init VR simulator for selected device parameters
+void CloseVrSimulator(void);                            // Close VR simulator for current device
+void UpdateVrTracking(Camera *camera);                  // Update VR tracking (position and orientation) and camera
+void ToggleVrMode(void);                                // Enable/Disable VR experience (device or simulator)
+void BeginVrDrawing(void);                              // Begin VR stereo rendering
+void EndVrDrawing(void);                                // End VR stereo rendering
+
+void TraceLog(int msgType, const char *text, ...);      // Show trace log messages (LOG_INFO, LOG_WARNING, LOG_ERROR, LOG_DEBUG)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // RLGL_H