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466 linhas
18 KiB
466 linhas
18 KiB
/**********************************************************************************************
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*
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* raylib.pbr - Some useful functions to deal with pbr materials and lights
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*
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* CONFIGURATION:
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*
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* #define RPBR_IMPLEMENTATION
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* Generates the implementation of the library into the included file.
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* If not defined, the library is in header only mode and can be included in other headers
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* or source files without problems. But only ONE file should hold the implementation.
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*
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* LICENSE: zlib/libpng
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*
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* Copyright (c) 2023-2024 Afan OLOVCIC (@_DevDad) 2017-2020 Victor Fisac(@victorfisac),Ramon Santamaria (@raysan5)
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*
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* This software is provided "as-is", without any express or implied warranty. In no event
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* will the authors be held liable for any damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose, including commercial
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* applications, and to alter it and redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not claim that you
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* wrote the original software. If you use this software in a product, an acknowledgment
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* in the product documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
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* as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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**********************************************************************************************/
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#ifndef RPBR_H
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#define RPBR_H
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#include "raylib.h"
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//----------------------------------------------------------------------------------
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// Defines and Macros
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//----------------------------------------------------------------------------------
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#define MAX_LIGHTS 4 // Max dynamic lights supported by shader
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#define SHADER_LOC_MAP_MRA SHADER_LOC_MAP_METALNESS //METALLIC, ROUGHNESS and AO
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#define SHADER_LOC_MAP_EMISSIVE SHADER_LOC_MAP_HEIGHT //EMISSIVE
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#define MATERIAL_MAP_MRA MATERIAL_MAP_METALNESS
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#define MATERIAL_MAP_EMISSIVE MATERIAL_MAP_HEIGHT
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#define NULL 0
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#define COLOR_TO_ARRAY(c)
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typedef struct {
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int enabled;
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int type;
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Vector3 position;
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Vector3 target;
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float color[4];
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float intensity;
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int enabledLoc;
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int typeLoc;
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int positionLoc;
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int targetLoc;
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int colorLoc;
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int intensityLoc;
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} PBRLight;
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typedef enum {
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LIGHT_DIRECTIONAL = 0,
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LIGHT_POINT,
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LIGHT_SPOT
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} PBRLightType;
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typedef struct{
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Shader pbrShader;
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Shader skyShader;
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unsigned int cubemap;
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unsigned int irradiance;
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unsigned int prefilter;
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unsigned int brdf;
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int modelMatrixLoc;
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int pbrViewLoc;
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int skyViewLoc;
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int skyResolutionLoc;
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} PBREnvironment;
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typedef enum{
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PBR_COLOR_ALBEDO = 0,
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PBR_COLOR_EMISSIVE
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}PBRColorType;
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typedef enum{
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PBR_VEC2_TILING = 0,
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PBR_VEC2_OFFSET
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}PBRVec2Type;
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typedef enum{
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PBR_PARAM_NORMAL =0,
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PBR_PARAM_METALLIC,
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PBR_PARAM_ROUGHNESS,
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PBR_PARAM_EMISSIVE,
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PBR_PARAM_AO
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}PBRFloatType;
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typedef enum{
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PBR_TEXTURE_ALBEDO = 0,
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PBR_TEXTURE_NORMAL,
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PBR_TEXTURE_MRA,
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PBR_TEXTURE_EMISSIVE
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}PBRTexType;
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// Textures are moved to material from params to pack better and use less textures on the end
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// texture MRAE 4Channel R: Metallic G: Roughness B: A: Ambient Occlusion
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// texEmissive use just one channel, so we have 3 channels still to use if we need
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typedef struct {
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Shader pbrShader;
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float albedo[4];
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float normal;
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float metallic;
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float roughness;
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float ao;
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float emissive[4];
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float ambient[3];
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float emissivePower;
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Texture2D texAlbedo;
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Texture2D texNormal;
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Texture2D texMRA;//r: Metallic g: Roughness b: AO a:Empty
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Texture2D texEmissive; //Emissive Texture
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// Using float4 to store tilling at 1st and 2nd position and offset at 3rd and 4th
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float texTiling[2];
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float texOffset[2];
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int useTexAlbedo;
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int useTexNormal;
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int useTexMRA;
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int useTexEmissive;
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int albedoLoc;
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int normalLoc;
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int metallicLoc;
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int roughnessLoc;
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int aoLoc;
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int emissiveColorLoc;
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int emissivePowerLoc;
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int texTilingLoc;
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int texOffsetLoc;
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int useTexAlbedoLoc;
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int useTexNormalLoc;
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int useTexMRAELoc;
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int useTexEmissiveLoc;
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} PBRMaterial;
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typedef struct{
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Model model;
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PBRMaterial pbrMat;
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}PBRModel;
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#ifdef __cplusplus
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extern "C" {
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#endif
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//----------------------------------------------------------------------------------
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// Module Functions Declaration
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//----------------------------------------------------------------------------------
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// Create a light and get shader locations
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PBRLight PBRLightCreate(int type, Vector3 position, Vector3 target, Color color,float intensity, Shader shader);
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// Send light properties to shader
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void PBRLightUpdate(Shader shader, PBRLight light);
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//For now until we do real skylight
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void PBRSetAmbient(Shader shader, Color color, float intensity);
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PBRModel PBRModelLoad(const char *fileName);
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PBRModel PBRModelLoadFromMesh(Mesh mesh);
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void PBRLoadTextures(PBRMaterial *pbrMat,PBRTexType pbrTexType,const char *fileName);
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void UnloadPBRMaterial(PBRMaterial pbrMat);
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void PBRSetColor(PBRMaterial *pbrMat,PBRColorType pbrColorType,Color color);
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void PBRSetVec2(PBRMaterial *pbrMat,PBRVec2Type type,Vector2 value);
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void PBRSetFloat(PBRMaterial *pbrMat, PBRFloatType pbrParamType, float value);
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void PBRMaterialSetup( PBRMaterial *pbrMat,Shader pbrShader, PBREnvironment* environment);
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void PBRSetMaterial(PBRModel* model,PBRMaterial* pbrMat,int matIndex);
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void PBRDrawModel(PBRModel pbrModel, Vector3 position, float scale);
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#ifdef __cplusplus
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}
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#endif
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#endif //RPBR_H
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/***********************************************************************************
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*
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* RPBR IMPLEMENTATION
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*
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************************************************************************************/
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#if defined(RPBR_IMPLEMENTATION)
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//----------------------------------------------------------------------------------
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// Global Variables Definition
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//----------------------------------------------------------------------------------
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static int lightsCount = 0; // Current amount of created lights
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// Create a light and get shader locations
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PBRLight PBRLightCreate(int type, Vector3 position, Vector3 target, Color color,float intensity, Shader shader)
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{
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PBRLight light = { 0 };
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if (lightsCount < MAX_LIGHTS)
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{
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light.enabled = 1;
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light.type = type;
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light.position = position;
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light.target = target;
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light.color[0] = (float)color.r/(float)255;
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light.color[1] = (float)color.g/(float)255;
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light.color[2] = (float)color.b/(float)255;
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light.color[3] = (float)color.a/(float)255;
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light.intensity = intensity;
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// NOTE: Lighting shader naming must be the provided ones
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light.enabledLoc = GetShaderLocation(shader, TextFormat("lights[%i].enabled", lightsCount));
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light.typeLoc = GetShaderLocation(shader, TextFormat("lights[%i].type", lightsCount));
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light.positionLoc = GetShaderLocation(shader, TextFormat("lights[%i].position", lightsCount));
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light.targetLoc = GetShaderLocation(shader, TextFormat("lights[%i].target", lightsCount));
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light.colorLoc = GetShaderLocation(shader, TextFormat("lights[%i].color", lightsCount));
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light.intensityLoc = GetShaderLocation(shader, TextFormat("lights[%i].intensity", lightsCount));
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PBRLightUpdate(shader, light);
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lightsCount++;
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}
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return light;
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}
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// Send light properties to shader
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// NOTE: Light shader locations should be available
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void PBRLightUpdate(Shader shader, PBRLight light)
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{
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SetShaderValue(shader, light.enabledLoc, &light.enabled, SHADER_UNIFORM_INT);
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SetShaderValue(shader, light.typeLoc, &light.type, SHADER_UNIFORM_INT);
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// Send to shader light position values
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float position[3] = { light.position.x, light.position.y, light.position.z };
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SetShaderValue(shader, light.positionLoc, position, SHADER_UNIFORM_VEC3);
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// Send to shader light target position values
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float target[3] = { light.target.x, light.target.y, light.target.z };
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SetShaderValue(shader, light.targetLoc, target, SHADER_UNIFORM_VEC3);
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SetShaderValue(shader, light.colorLoc, light.color, SHADER_UNIFORM_VEC4);
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SetShaderValue(shader, light.intensityLoc, &light.intensity, SHADER_UNIFORM_FLOAT);
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}
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void PBRSetAmbient(Shader shader, Color color, float intensity){
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float col[3] = {color.r/255,color.g/255,color.b/255};
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SetShaderValue(shader, GetShaderLocation(shader, "ambientColor"), col, SHADER_UNIFORM_VEC3);
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SetShaderValue(shader, GetShaderLocation(shader, "ambient"), &intensity, SHADER_UNIFORM_FLOAT);
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}
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void PBRMaterialSetup(PBRMaterial *pbrMat, Shader pbrShader, PBREnvironment* environment){
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pbrMat->pbrShader = pbrShader;
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pbrMat->texAlbedo = (Texture2D){0};
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pbrMat->texNormal = (Texture2D){0};
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pbrMat->texMRA = (Texture2D){0};
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pbrMat->texEmissive = (Texture2D){0};
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//PBRParam
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pbrMat->albedo[0] = 1.0;
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pbrMat->albedo[1] = 1.0;
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pbrMat->albedo[2] = 1.0;
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pbrMat->albedo[3] = 1.0;
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pbrMat->metallic = 0;
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pbrMat->roughness = 0;
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pbrMat->ao = 1.0;
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pbrMat->normal = 1;
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pbrMat->emissive[0] = 0;
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pbrMat->emissive[1] = 0;
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pbrMat->emissive[2] = 0;
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pbrMat->emissive[3] = 0;
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pbrMat->texTiling[0] = 1.0;
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pbrMat->texTiling[1] = 1.0;
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pbrMat->texOffset[0] = 0.0;
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pbrMat->texOffset[1] = 0.0;
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pbrMat->emissivePower = 1.0;
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// Set up PBR shader material locations
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pbrMat->albedoLoc = GetShaderLocation(pbrMat->pbrShader, "albedoColor");
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pbrMat->normalLoc = GetShaderLocation(pbrMat->pbrShader, "normalValue");
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pbrMat->metallicLoc = GetShaderLocation(pbrMat->pbrShader, "metallicValue");
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pbrMat->roughnessLoc = GetShaderLocation(pbrMat->pbrShader, "roughnessValue");
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pbrMat->aoLoc = GetShaderLocation(pbrMat->pbrShader, "aoValue");
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pbrMat->emissiveColorLoc = GetShaderLocation(pbrMat->pbrShader, "emissiveColor");
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pbrMat->emissivePowerLoc = GetShaderLocation(pbrMat->pbrShader, "emissivePower");
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pbrMat->texTilingLoc = GetShaderLocation(pbrMat->pbrShader, "tiling");
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pbrMat->texOffsetLoc = GetShaderLocation(pbrMat->pbrShader, "offset");
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pbrMat->useTexAlbedoLoc = GetShaderLocation(pbrMat->pbrShader, "useTexAlbedo");
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pbrMat->useTexNormalLoc = GetShaderLocation(pbrMat->pbrShader, "useTexNormal");
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pbrMat->useTexMRAELoc = GetShaderLocation(pbrMat->pbrShader, "useTexMRA");
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pbrMat->useTexEmissiveLoc = GetShaderLocation(pbrMat->pbrShader, "useTexEmissive");
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SetShaderValue(pbrMat->pbrShader,pbrMat->albedoLoc,pbrMat->albedo,SHADER_UNIFORM_VEC4);
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SetShaderValue(pbrMat->pbrShader, pbrMat->emissiveColorLoc, pbrMat->emissive, SHADER_UNIFORM_VEC4);
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SetShaderValue(pbrMat->pbrShader, pbrMat->emissivePowerLoc, &pbrMat->emissivePower, SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->metallicLoc,&pbrMat->metallic,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->roughnessLoc,&pbrMat->roughness,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->aoLoc,&pbrMat->ao,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->normalLoc,&pbrMat->normal,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->texTilingLoc,pbrMat->texTiling,SHADER_UNIFORM_VEC2);
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SetShaderValue(pbrMat->pbrShader,pbrMat->texOffsetLoc,pbrMat->texOffset,SHADER_UNIFORM_VEC2);
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}
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void PBRLoadTextures(PBRMaterial *pbrMat,PBRTexType pbrTexType,const char *fileName){
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if(pbrMat == NULL) return;
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switch(pbrTexType){
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case PBR_TEXTURE_ALBEDO:
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pbrMat->texAlbedo = LoadTexture(fileName);
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pbrMat->useTexAlbedo = 1;
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break;
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case PBR_TEXTURE_MRA:
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pbrMat->texMRA = LoadTexture(fileName);
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pbrMat->useTexMRA = 1;
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break;
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case PBR_TEXTURE_NORMAL:
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pbrMat->texNormal = LoadTexture(fileName);
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pbrMat->useTexNormal = 1;
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break;
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case PBR_TEXTURE_EMISSIVE:
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pbrMat->texEmissive = LoadTexture(fileName);
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pbrMat->useTexEmissive = 1;
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break;
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}
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}
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void UnloadPBRMaterial(PBRMaterial pbrMat){
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if(pbrMat.useTexAlbedo == 1) UnloadTexture(pbrMat.texAlbedo);
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if(pbrMat.useTexNormal == 1) UnloadTexture(pbrMat.texNormal);
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if(pbrMat.useTexMRA == 1) UnloadTexture(pbrMat.texMRA);
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if(pbrMat.useTexEmissive == 1) UnloadTexture(pbrMat.texEmissive);
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}
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void PBRSetColor(PBRMaterial *pbrMat,PBRColorType pbrColorType,Color color){
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if(pbrMat == NULL) return;
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switch(pbrColorType){
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case PBR_COLOR_ALBEDO:
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pbrMat->albedo[0] = (float) color.r / 255;
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pbrMat->albedo[1] = (float) color.g / 255;
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pbrMat->albedo[2] = (float) color.b / 255;
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pbrMat->albedo[3] = (float) color.a / 255;
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SetShaderValue(pbrMat->pbrShader,pbrMat->albedoLoc,pbrMat->albedo,SHADER_UNIFORM_VEC4);
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break;
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case PBR_COLOR_EMISSIVE:
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pbrMat->emissive[0] = (float) color.r / 255;
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pbrMat->emissive[1] = (float) color.g / 255;
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pbrMat->emissive[2] = (float) color.b / 255;
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pbrMat->emissive[3] = (float) color.a / 255;
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SetShaderValue(pbrMat->pbrShader, pbrMat->emissiveColorLoc, pbrMat->emissive, SHADER_UNIFORM_VEC4);
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break;
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}
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}
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void PBRSetFloat(PBRMaterial *pbrMat, PBRFloatType pbrParamType, float value){
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if(pbrMat == NULL) return;
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switch(pbrParamType){
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case PBR_PARAM_METALLIC:
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pbrMat->metallic = value;
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SetShaderValue(pbrMat->pbrShader,pbrMat->metallicLoc,&pbrMat->metallic,SHADER_UNIFORM_FLOAT);
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break;
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case PBR_PARAM_ROUGHNESS:
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pbrMat->roughness = value;
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SetShaderValue(pbrMat->pbrShader,pbrMat->roughnessLoc,&pbrMat->roughness,SHADER_UNIFORM_FLOAT);
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break;
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case PBR_PARAM_NORMAL:
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pbrMat->normal = value;
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SetShaderValue(pbrMat->pbrShader,pbrMat->normalLoc,&pbrMat->normal,SHADER_UNIFORM_FLOAT);
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break;
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case PBR_PARAM_AO:
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pbrMat->ao = value;
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SetShaderValue(pbrMat->pbrShader,pbrMat->aoLoc,&pbrMat->ao,SHADER_UNIFORM_FLOAT);
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break;
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case PBR_PARAM_EMISSIVE:
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pbrMat->emissivePower = value;
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SetShaderValue(pbrMat->pbrShader,pbrMat->emissivePowerLoc,&pbrMat->emissivePower,SHADER_UNIFORM_FLOAT);
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break;
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}
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}
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void PBRSetVec2(PBRMaterial *pbrMat,PBRVec2Type type,Vector2 value){
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switch(type){
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case PBR_VEC2_TILING:
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pbrMat->texTiling[0] = value.x;
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pbrMat->texTiling[1] = value.y;
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SetShaderValue(pbrMat->pbrShader,pbrMat->texTilingLoc,&pbrMat->texTiling,SHADER_UNIFORM_VEC2);
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break;
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case PBR_VEC2_OFFSET:
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pbrMat->texOffset[0] = value.x;
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pbrMat->texOffset[1] = value.y;
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SetShaderValue(pbrMat->pbrShader,pbrMat->texOffsetLoc,&pbrMat->texOffset,SHADER_UNIFORM_VEC2);
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break;
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}
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}
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void PBRSetMaterial(PBRModel* model,PBRMaterial* pbrMat,int matIndex){
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model->pbrMat = *pbrMat;
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model->model.materials[matIndex].shader = model->pbrMat.pbrShader;
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pbrMat->pbrShader.locs[SHADER_LOC_MAP_MRA] = GetShaderLocation(pbrMat->pbrShader, "mraMap");
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pbrMat->pbrShader.locs[SHADER_LOC_MAP_EMISSIVE] = GetShaderLocation(pbrMat->pbrShader, "emissiveMap");
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pbrMat->pbrShader.locs[SHADER_LOC_MAP_NORMAL] = GetShaderLocation(pbrMat->pbrShader, "normalMap");
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if(pbrMat->useTexAlbedo) {
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model->model.materials[matIndex].maps[MATERIAL_MAP_ALBEDO].texture = pbrMat->texAlbedo;
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}
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if(pbrMat->useTexMRA) {
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model->model.materials[matIndex].maps[MATERIAL_MAP_MRA].texture = pbrMat->texMRA;
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}
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if(pbrMat->useTexNormal) {
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model->model.materials[matIndex].maps[MATERIAL_MAP_NORMAL].texture = pbrMat->texNormal;
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}
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if(pbrMat->useTexEmissive) {
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model->model.materials[matIndex].maps[MATERIAL_MAP_EMISSIVE].texture = pbrMat->texEmissive;
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}
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SetShaderValue(pbrMat->pbrShader,pbrMat->useTexAlbedoLoc,&pbrMat->useTexAlbedo,SHADER_UNIFORM_INT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->useTexNormalLoc,&pbrMat->useTexNormal,SHADER_UNIFORM_INT);
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SetShaderValue(pbrMat->pbrShader, pbrMat->useTexMRAELoc, &pbrMat->useTexMRA, SHADER_UNIFORM_INT);
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SetShaderValue(pbrMat->pbrShader, pbrMat->useTexEmissiveLoc, &pbrMat->useTexEmissive, SHADER_UNIFORM_INT);
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}
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void PBRDrawModel(PBRModel pbrModel, Vector3 position, float scale){
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PBRMaterial *pbrMat = &pbrModel.pbrMat;
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SetShaderValue(pbrMat->pbrShader,pbrMat->albedoLoc,pbrMat->albedo,SHADER_UNIFORM_VEC4);
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SetShaderValue(pbrMat->pbrShader, pbrMat->emissiveColorLoc, pbrMat->emissive, SHADER_UNIFORM_VEC4);
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SetShaderValue(pbrMat->pbrShader,pbrMat->metallicLoc,&pbrMat->metallic,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->roughnessLoc,&pbrMat->roughness,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->aoLoc,&pbrMat->ao,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->normalLoc,&pbrMat->normal,SHADER_UNIFORM_FLOAT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->texTilingLoc,pbrMat->texTiling,SHADER_UNIFORM_VEC2);
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SetShaderValue(pbrMat->pbrShader,pbrMat->texOffsetLoc,pbrMat->texOffset,SHADER_UNIFORM_VEC2);
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SetShaderValue(pbrMat->pbrShader,pbrMat->useTexAlbedoLoc,&pbrMat->useTexAlbedo,SHADER_UNIFORM_INT);
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SetShaderValue(pbrMat->pbrShader,pbrMat->useTexNormalLoc,&pbrMat->useTexNormal,SHADER_UNIFORM_INT);
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SetShaderValue(pbrMat->pbrShader, pbrMat->useTexMRAELoc, &pbrMat->useTexMRA, SHADER_UNIFORM_INT);
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SetShaderValue(pbrMat->pbrShader, pbrMat->useTexEmissiveLoc, &pbrMat->useTexEmissive, SHADER_UNIFORM_INT);
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DrawModel(pbrModel.model,position,scale,WHITE);
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}
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PBRModel PBRModelLoad(const char *fileName){
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PBRModel pbrModel = (PBRModel){0};
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pbrModel.model = LoadModel(fileName);
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return pbrModel;
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}
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PBRModel PBRModelLoadFromMesh(Mesh mesh){
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PBRModel pbrModel = (PBRModel){0};
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pbrModel.model = LoadModelFromMesh(mesh);
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return pbrModel;
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}
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#endif // RPBR_IMPLEMENTATION
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