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Remove dependencies from PBR example (#3649)

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* Remove dependencies from PBR example

* Reviewed example PR

---------

Co-authored-by: Ray <raysan5@gmail.com>
This commit is contained in:
TheManTheMythTheGameDev 2023-12-19 01:36:03 -08:00 committed by GitHub
parent 9fcfc8d64b
commit 34a9163c52
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2 changed files with 171 additions and 513 deletions
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466
examples/shaders/rpbr.h
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@ -1,466 +0,0 @@
/**********************************************************************************************
*
* raylib.pbr - Some useful functions to deal with pbr materials and lights
*
* CONFIGURATION:
*
* #define RPBR_IMPLEMENTATION
* Generates the implementation of the library into the included file.
* If not defined, the library is in header only mode and can be included in other headers
* or source files without problems. But only ONE file should hold the implementation.
*
* LICENSE: zlib/libpng
*
* Copyright (c) 2023-2024 Afan OLOVCIC (@_DevDad) 2017-2020 Victor Fisac(@victorfisac),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 RPBR_H
#define RPBR_H
#include "raylib.h"
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#define MAX_LIGHTS 4 // Max dynamic lights supported by shader
#define SHADER_LOC_MAP_MRA SHADER_LOC_MAP_METALNESS //METALLIC, ROUGHNESS and AO
#define SHADER_LOC_MAP_EMISSIVE SHADER_LOC_MAP_HEIGHT //EMISSIVE
#define MATERIAL_MAP_MRA MATERIAL_MAP_METALNESS
#define MATERIAL_MAP_EMISSIVE MATERIAL_MAP_HEIGHT
#define NULL 0
#define COLOR_TO_ARRAY(c)
typedef struct {
int enabled;
int type;
Vector3 position;
Vector3 target;
float color[4];
float intensity;
int enabledLoc;
int typeLoc;
int positionLoc;
int targetLoc;
int colorLoc;
int intensityLoc;
} PBRLight;
typedef enum {
LIGHT_DIRECTIONAL = 0,
LIGHT_POINT,
LIGHT_SPOT
} PBRLightType;
typedef struct{
Shader pbrShader;
Shader skyShader;
unsigned int cubemap;
unsigned int irradiance;
unsigned int prefilter;
unsigned int brdf;
int modelMatrixLoc;
int pbrViewLoc;
int skyViewLoc;
int skyResolutionLoc;
} PBREnvironment;
typedef enum{
PBR_COLOR_ALBEDO = 0,
PBR_COLOR_EMISSIVE
}PBRColorType;
typedef enum{
PBR_VEC2_TILING = 0,
PBR_VEC2_OFFSET
}PBRVec2Type;
typedef enum{
PBR_PARAM_NORMAL =0,
PBR_PARAM_METALLIC,
PBR_PARAM_ROUGHNESS,
PBR_PARAM_EMISSIVE,
PBR_PARAM_AO
}PBRFloatType;
typedef enum{
PBR_TEXTURE_ALBEDO = 0,
PBR_TEXTURE_NORMAL,
PBR_TEXTURE_MRA,
PBR_TEXTURE_EMISSIVE
}PBRTexType;
// Textures are moved to material from params to pack better and use less textures on the end
// texture MRAE 4Channel R: Metallic G: Roughness B: A: Ambient Occlusion
// texEmissive use just one channel, so we have 3 channels still to use if we need
typedef struct {
Shader pbrShader;
float albedo[4];
float normal;
float metallic;
float roughness;
float ao;
float emissive[4];
float ambient[3];
float emissivePower;
Texture2D texAlbedo;
Texture2D texNormal;
Texture2D texMRA;//r: Metallic g: Roughness b: AO a:Empty
Texture2D texEmissive; //Emissive Texture
// Using float4 to store tilling at 1st and 2nd position and offset at 3rd and 4th
float texTiling[2];
float texOffset[2];
int useTexAlbedo;
int useTexNormal;
int useTexMRA;
int useTexEmissive;
int albedoLoc;
int normalLoc;
int metallicLoc;
int roughnessLoc;
int aoLoc;
int emissiveColorLoc;
int emissivePowerLoc;
int texTilingLoc;
int texOffsetLoc;
int useTexAlbedoLoc;
int useTexNormalLoc;
int useTexMRAELoc;
int useTexEmissiveLoc;
} PBRMaterial;
typedef struct{
Model model;
PBRMaterial pbrMat;
}PBRModel;
#ifdef __cplusplus
extern "C" {
#endif
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
// Create a light and get shader locations
PBRLight PBRLightCreate(int type, Vector3 position, Vector3 target, Color color,float intensity, Shader shader);
// Send light properties to shader
void PBRLightUpdate(Shader shader, PBRLight light);
//For now until we do real skylight
void PBRSetAmbient(Shader shader, Color color, float intensity);
PBRModel PBRModelLoad(const char *fileName);
PBRModel PBRModelLoadFromMesh(Mesh mesh);
void PBRLoadTextures(PBRMaterial *pbrMat,PBRTexType pbrTexType,const char *fileName);
void UnloadPBRMaterial(PBRMaterial pbrMat);
void PBRSetColor(PBRMaterial *pbrMat,PBRColorType pbrColorType,Color color);
void PBRSetVec2(PBRMaterial *pbrMat,PBRVec2Type type,Vector2 value);
void PBRSetFloat(PBRMaterial *pbrMat, PBRFloatType pbrParamType, float value);
void PBRMaterialSetup( PBRMaterial *pbrMat,Shader pbrShader, PBREnvironment* environment);
void PBRSetMaterial(PBRModel* model,PBRMaterial* pbrMat,int matIndex);
void PBRDrawModel(PBRModel pbrModel, Vector3 position, float scale);
#ifdef __cplusplus
}
#endif
#endif //RPBR_H
/***********************************************************************************
*
* RPBR IMPLEMENTATION
*
************************************************************************************/
#if defined(RPBR_IMPLEMENTATION)
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
static int lightsCount = 0; // Current amount of created lights
// Create a light and get shader locations
PBRLight PBRLightCreate(int type, Vector3 position, Vector3 target, Color color,float intensity, Shader shader)
{
PBRLight light = { 0 };
if (lightsCount < MAX_LIGHTS)
{
light.enabled = 1;
light.type = type;
light.position = position;
light.target = target;
light.color[0] = (float)color.r/(float)255;
light.color[1] = (float)color.g/(float)255;
light.color[2] = (float)color.b/(float)255;
light.color[3] = (float)color.a/(float)255;
light.intensity = intensity;
// NOTE: Lighting shader naming must be the provided ones
light.enabledLoc = GetShaderLocation(shader, TextFormat("lights[%i].enabled", lightsCount));
light.typeLoc = GetShaderLocation(shader, TextFormat("lights[%i].type", lightsCount));
light.positionLoc = GetShaderLocation(shader, TextFormat("lights[%i].position", lightsCount));
light.targetLoc = GetShaderLocation(shader, TextFormat("lights[%i].target", lightsCount));
light.colorLoc = GetShaderLocation(shader, TextFormat("lights[%i].color", lightsCount));
light.intensityLoc = GetShaderLocation(shader, TextFormat("lights[%i].intensity", lightsCount));
PBRLightUpdate(shader, light);
lightsCount++;
}
return light;
}
// Send light properties to shader
// NOTE: Light shader locations should be available
void PBRLightUpdate(Shader shader, PBRLight light)
{
SetShaderValue(shader, light.enabledLoc, &light.enabled, SHADER_UNIFORM_INT);
SetShaderValue(shader, light.typeLoc, &light.type, SHADER_UNIFORM_INT);
// Send to shader light position values
float position[3] = { light.position.x, light.position.y, light.position.z };
SetShaderValue(shader, light.positionLoc, position, SHADER_UNIFORM_VEC3);
// Send to shader light target position values
float target[3] = { light.target.x, light.target.y, light.target.z };
SetShaderValue(shader, light.targetLoc, target, SHADER_UNIFORM_VEC3);
SetShaderValue(shader, light.colorLoc, light.color, SHADER_UNIFORM_VEC4);
SetShaderValue(shader, light.intensityLoc, &light.intensity, SHADER_UNIFORM_FLOAT);
}
void PBRSetAmbient(Shader shader, Color color, float intensity){
float col[3] = {color.r/255,color.g/255,color.b/255};
SetShaderValue(shader, GetShaderLocation(shader, "ambientColor"), col, SHADER_UNIFORM_VEC3);
SetShaderValue(shader, GetShaderLocation(shader, "ambient"), &intensity, SHADER_UNIFORM_FLOAT);
}
void PBRMaterialSetup(PBRMaterial *pbrMat, Shader pbrShader, PBREnvironment* environment){
pbrMat->pbrShader = pbrShader;
pbrMat->texAlbedo = (Texture2D){0};
pbrMat->texNormal = (Texture2D){0};
pbrMat->texMRA = (Texture2D){0};
pbrMat->texEmissive = (Texture2D){0};
//PBRParam
pbrMat->albedo[0] = 1.0;
pbrMat->albedo[1] = 1.0;
pbrMat->albedo[2] = 1.0;
pbrMat->albedo[3] = 1.0;
pbrMat->metallic = 0;
pbrMat->roughness = 0;
pbrMat->ao = 1.0;
pbrMat->normal = 1;
pbrMat->emissive[0] = 0;
pbrMat->emissive[1] = 0;
pbrMat->emissive[2] = 0;
pbrMat->emissive[3] = 0;
pbrMat->texTiling[0] = 1.0;
pbrMat->texTiling[1] = 1.0;
pbrMat->texOffset[0] = 0.0;
pbrMat->texOffset[1] = 0.0;
pbrMat->emissivePower = 1.0;
// Set up PBR shader material locations
pbrMat->albedoLoc = GetShaderLocation(pbrMat->pbrShader, "albedoColor");
pbrMat->normalLoc = GetShaderLocation(pbrMat->pbrShader, "normalValue");
pbrMat->metallicLoc = GetShaderLocation(pbrMat->pbrShader, "metallicValue");
pbrMat->roughnessLoc = GetShaderLocation(pbrMat->pbrShader, "roughnessValue");
pbrMat->aoLoc = GetShaderLocation(pbrMat->pbrShader, "aoValue");
pbrMat->emissiveColorLoc = GetShaderLocation(pbrMat->pbrShader, "emissiveColor");
pbrMat->emissivePowerLoc = GetShaderLocation(pbrMat->pbrShader, "emissivePower");
pbrMat->texTilingLoc = GetShaderLocation(pbrMat->pbrShader, "tiling");
pbrMat->texOffsetLoc = GetShaderLocation(pbrMat->pbrShader, "offset");
pbrMat->useTexAlbedoLoc = GetShaderLocation(pbrMat->pbrShader, "useTexAlbedo");
pbrMat->useTexNormalLoc = GetShaderLocation(pbrMat->pbrShader, "useTexNormal");
pbrMat->useTexMRAELoc = GetShaderLocation(pbrMat->pbrShader, "useTexMRA");
pbrMat->useTexEmissiveLoc = GetShaderLocation(pbrMat->pbrShader, "useTexEmissive");
SetShaderValue(pbrMat->pbrShader,pbrMat->albedoLoc,pbrMat->albedo,SHADER_UNIFORM_VEC4);
SetShaderValue(pbrMat->pbrShader, pbrMat->emissiveColorLoc, pbrMat->emissive, SHADER_UNIFORM_VEC4);
SetShaderValue(pbrMat->pbrShader, pbrMat->emissivePowerLoc, &pbrMat->emissivePower, SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->metallicLoc,&pbrMat->metallic,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->roughnessLoc,&pbrMat->roughness,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->aoLoc,&pbrMat->ao,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->normalLoc,&pbrMat->normal,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->texTilingLoc,pbrMat->texTiling,SHADER_UNIFORM_VEC2);
SetShaderValue(pbrMat->pbrShader,pbrMat->texOffsetLoc,pbrMat->texOffset,SHADER_UNIFORM_VEC2);
}
void PBRLoadTextures(PBRMaterial *pbrMat,PBRTexType pbrTexType,const char *fileName){
if(pbrMat == NULL) return;
switch(pbrTexType){
case PBR_TEXTURE_ALBEDO:
pbrMat->texAlbedo = LoadTexture(fileName);
pbrMat->useTexAlbedo = 1;
break;
case PBR_TEXTURE_MRA:
pbrMat->texMRA = LoadTexture(fileName);
pbrMat->useTexMRA = 1;
break;
case PBR_TEXTURE_NORMAL:
pbrMat->texNormal = LoadTexture(fileName);
pbrMat->useTexNormal = 1;
break;
case PBR_TEXTURE_EMISSIVE:
pbrMat->texEmissive = LoadTexture(fileName);
pbrMat->useTexEmissive = 1;
break;
}
}
void UnloadPBRMaterial(PBRMaterial pbrMat){
if(pbrMat.useTexAlbedo == 1) UnloadTexture(pbrMat.texAlbedo);
if(pbrMat.useTexNormal == 1) UnloadTexture(pbrMat.texNormal);
if(pbrMat.useTexMRA == 1) UnloadTexture(pbrMat.texMRA);
if(pbrMat.useTexEmissive == 1) UnloadTexture(pbrMat.texEmissive);
}
void PBRSetColor(PBRMaterial *pbrMat,PBRColorType pbrColorType,Color color){
if(pbrMat == NULL) return;
switch(pbrColorType){
case PBR_COLOR_ALBEDO:
pbrMat->albedo[0] = (float) color.r / 255;
pbrMat->albedo[1] = (float) color.g / 255;
pbrMat->albedo[2] = (float) color.b / 255;
pbrMat->albedo[3] = (float) color.a / 255;
SetShaderValue(pbrMat->pbrShader,pbrMat->albedoLoc,pbrMat->albedo,SHADER_UNIFORM_VEC4);
break;
case PBR_COLOR_EMISSIVE:
pbrMat->emissive[0] = (float) color.r / 255;
pbrMat->emissive[1] = (float) color.g / 255;
pbrMat->emissive[2] = (float) color.b / 255;
pbrMat->emissive[3] = (float) color.a / 255;
SetShaderValue(pbrMat->pbrShader, pbrMat->emissiveColorLoc, pbrMat->emissive, SHADER_UNIFORM_VEC4);
break;
}
}
void PBRSetFloat(PBRMaterial *pbrMat, PBRFloatType pbrParamType, float value){
if(pbrMat == NULL) return;
switch(pbrParamType){
case PBR_PARAM_METALLIC:
pbrMat->metallic = value;
SetShaderValue(pbrMat->pbrShader,pbrMat->metallicLoc,&pbrMat->metallic,SHADER_UNIFORM_FLOAT);
break;
case PBR_PARAM_ROUGHNESS:
pbrMat->roughness = value;
SetShaderValue(pbrMat->pbrShader,pbrMat->roughnessLoc,&pbrMat->roughness,SHADER_UNIFORM_FLOAT);
break;
case PBR_PARAM_NORMAL:
pbrMat->normal = value;
SetShaderValue(pbrMat->pbrShader,pbrMat->normalLoc,&pbrMat->normal,SHADER_UNIFORM_FLOAT);
break;
case PBR_PARAM_AO:
pbrMat->ao = value;
SetShaderValue(pbrMat->pbrShader,pbrMat->aoLoc,&pbrMat->ao,SHADER_UNIFORM_FLOAT);
break;
case PBR_PARAM_EMISSIVE:
pbrMat->emissivePower = value;
SetShaderValue(pbrMat->pbrShader,pbrMat->emissivePowerLoc,&pbrMat->emissivePower,SHADER_UNIFORM_FLOAT);
break;
}
}
void PBRSetVec2(PBRMaterial *pbrMat,PBRVec2Type type,Vector2 value){
switch(type){
case PBR_VEC2_TILING:
pbrMat->texTiling[0] = value.x;
pbrMat->texTiling[1] = value.y;
SetShaderValue(pbrMat->pbrShader,pbrMat->texTilingLoc,&pbrMat->texTiling,SHADER_UNIFORM_VEC2);
break;
case PBR_VEC2_OFFSET:
pbrMat->texOffset[0] = value.x;
pbrMat->texOffset[1] = value.y;
SetShaderValue(pbrMat->pbrShader,pbrMat->texOffsetLoc,&pbrMat->texOffset,SHADER_UNIFORM_VEC2);
break;
}
}
void PBRSetMaterial(PBRModel* model,PBRMaterial* pbrMat,int matIndex){
model->pbrMat = *pbrMat;
model->model.materials[matIndex].shader = model->pbrMat.pbrShader;
pbrMat->pbrShader.locs[SHADER_LOC_MAP_MRA] = GetShaderLocation(pbrMat->pbrShader, "mraMap");
pbrMat->pbrShader.locs[SHADER_LOC_MAP_EMISSIVE] = GetShaderLocation(pbrMat->pbrShader, "emissiveMap");
pbrMat->pbrShader.locs[SHADER_LOC_MAP_NORMAL] = GetShaderLocation(pbrMat->pbrShader, "normalMap");
if(pbrMat->useTexAlbedo) {
model->model.materials[matIndex].maps[MATERIAL_MAP_ALBEDO].texture = pbrMat->texAlbedo;
}
if(pbrMat->useTexMRA) {
model->model.materials[matIndex].maps[MATERIAL_MAP_MRA].texture = pbrMat->texMRA;
}
if(pbrMat->useTexNormal) {
model->model.materials[matIndex].maps[MATERIAL_MAP_NORMAL].texture = pbrMat->texNormal;
}
if(pbrMat->useTexEmissive) {
model->model.materials[matIndex].maps[MATERIAL_MAP_EMISSIVE].texture = pbrMat->texEmissive;
}
SetShaderValue(pbrMat->pbrShader,pbrMat->useTexAlbedoLoc,&pbrMat->useTexAlbedo,SHADER_UNIFORM_INT);
SetShaderValue(pbrMat->pbrShader,pbrMat->useTexNormalLoc,&pbrMat->useTexNormal,SHADER_UNIFORM_INT);
SetShaderValue(pbrMat->pbrShader, pbrMat->useTexMRAELoc, &pbrMat->useTexMRA, SHADER_UNIFORM_INT);
SetShaderValue(pbrMat->pbrShader, pbrMat->useTexEmissiveLoc, &pbrMat->useTexEmissive, SHADER_UNIFORM_INT);
}
void PBRDrawModel(PBRModel pbrModel, Vector3 position, float scale){
PBRMaterial *pbrMat = &pbrModel.pbrMat;
SetShaderValue(pbrMat->pbrShader,pbrMat->albedoLoc,pbrMat->albedo,SHADER_UNIFORM_VEC4);
SetShaderValue(pbrMat->pbrShader, pbrMat->emissiveColorLoc, pbrMat->emissive, SHADER_UNIFORM_VEC4);
SetShaderValue(pbrMat->pbrShader,pbrMat->metallicLoc,&pbrMat->metallic,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->roughnessLoc,&pbrMat->roughness,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->aoLoc,&pbrMat->ao,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->normalLoc,&pbrMat->normal,SHADER_UNIFORM_FLOAT);
SetShaderValue(pbrMat->pbrShader,pbrMat->texTilingLoc,pbrMat->texTiling,SHADER_UNIFORM_VEC2);
SetShaderValue(pbrMat->pbrShader,pbrMat->texOffsetLoc,pbrMat->texOffset,SHADER_UNIFORM_VEC2);
SetShaderValue(pbrMat->pbrShader,pbrMat->useTexAlbedoLoc,&pbrMat->useTexAlbedo,SHADER_UNIFORM_INT);
SetShaderValue(pbrMat->pbrShader,pbrMat->useTexNormalLoc,&pbrMat->useTexNormal,SHADER_UNIFORM_INT);
SetShaderValue(pbrMat->pbrShader, pbrMat->useTexMRAELoc, &pbrMat->useTexMRA, SHADER_UNIFORM_INT);
SetShaderValue(pbrMat->pbrShader, pbrMat->useTexEmissiveLoc, &pbrMat->useTexEmissive, SHADER_UNIFORM_INT);
DrawModel(pbrModel.model,position,scale,WHITE);
}
PBRModel PBRModelLoad(const char *fileName){
PBRModel pbrModel = (PBRModel){0};
pbrModel.model = LoadModel(fileName);
return pbrModel;
}
PBRModel PBRModelLoadFromMesh(Mesh mesh){
PBRModel pbrModel = (PBRModel){0};
pbrModel.model = LoadModelFromMesh(mesh);
return pbrModel;
}
#endif // RPBR_IMPLEMENTATION

218
examples/shaders/shaders_basic_pbr.c
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@ -19,15 +19,45 @@
#include <emscripten/emscripten.h>
#endif
#define RPBR_IMPLEMENTATION
#include "rpbr.h"
#if defined(PLATFORM_DESKTOP)
#define GLSL_VERSION 330
#else // PLATFORM_ANDROID, PLATFORM_WEB
#define GLSL_VERSION 120
#endif
#include <stdlib.h> // Required for: NULL
#define MAX_LIGHTS 4 // Max dynamic lights supported by shader
int lightsCount; // Current number of dynamic lights that have been created
typedef struct {
int enabled;
int type;
Vector3 position;
Vector3 target;
float color[4];
float intensity;
int enabledLoc;
int typeLoc;
int positionLoc;
int targetLoc;
int colorLoc;
int intensityLoc;
} PBRLight;
typedef enum {
LIGHT_DIRECTIONAL = 0,
LIGHT_POINT,
LIGHT_SPOT
} PBRLightType;
// Create a light and get shader locations
PBRLight PBRLightCreate(int type, Vector3 position, Vector3 target, Color color, float intensity, Shader shader);
// Send light properties to shader
// NOTE: Light shader locations should be available
void PBRLightUpdate(Shader shader, PBRLight light);
//----------------------------------------------------------------------------------
// Main Entry Point
@ -53,44 +83,69 @@ int main()
Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/pbr.vs",GLSL_VERSION),
TextFormat("resources/shaders/glsl%i/pbr.fs",GLSL_VERSION));
PBRModel model = PBRModelLoad("resources/models/old_car_new.glb");
//if we use obj file formator if model doesn't have tangents we have to calculate MeshTangents
//by using raylib function GenMeshTangents(mesh) for example: obj file doesn't support tangents
//GenMeshTangents(&model.model.meshes[0]);
PBRMaterial model_mat = (PBRMaterial){0};
PBRMaterialSetup(&model_mat, shader, NULL); //environment = NULL for now
PBRLoadTextures(&model_mat, PBR_TEXTURE_ALBEDO, "resources/old_car_d.png");
PBRLoadTextures(&model_mat, PBR_TEXTURE_MRA, "resources/old_car_mra.png");
PBRLoadTextures(&model_mat, PBR_TEXTURE_NORMAL, "resources/old_car_n.png");
PBRLoadTextures(&model_mat, PBR_TEXTURE_EMISSIVE, "resources/old_car_e.png");
PBRSetColor(&model_mat,PBR_COLOR_EMISSIVE, (Color){255,162,0,255});
PBRSetVec2(&model_mat, PBR_VEC2_TILING,(Vector2){0.5,0.5});
PBRSetMaterial(&model,&model_mat,0);
PBRModel floor = PBRModelLoad("resources/models/plane.glb");
PBRMaterial floor_mat = (PBRMaterial){0};
PBRMaterialSetup(&floor_mat, shader, NULL);
PBRLoadTextures(&floor_mat, PBR_TEXTURE_ALBEDO, "resources/road_a.png");
PBRLoadTextures(&floor_mat, PBR_TEXTURE_MRA, "resources/road_mra.png");
PBRLoadTextures(&floor_mat, PBR_TEXTURE_NORMAL, "resources/road_n.png");
PBRSetVec2(&floor_mat, PBR_VEC2_TILING,(Vector2){0.5,0.5});
PBRSetMaterial(&floor,&floor_mat,0);
shader.locs[SHADER_LOC_MAP_ALBEDO] = GetShaderLocation(shader, "albedoMap");
// In reality, metalness, roughness, and ambient occlusion are all packed into the MRA texture
// We'll pass it in as the metalness map
shader.locs[SHADER_LOC_MAP_METALNESS] = GetShaderLocation(shader, "mraMap");
shader.locs[SHADER_LOC_MAP_NORMAL] = GetShaderLocation(shader, "normalMap");
// Similarly to the MRA map, the emissive map packs different information into a single texture
// This map stores both height and emission in reality
shader.locs[SHADER_LOC_MAP_EMISSION] = GetShaderLocation(shader, "emissiveMap");
shader.locs[SHADER_LOC_COLOR_DIFFUSE] = GetShaderLocation(shader, "albedoColor");
shader.locs[SHADER_LOC_VECTOR_VIEW] = GetShaderLocation(shader, "viewPos");
int numOfLightsLoc = GetShaderLocation(shader, "numOfLights");
int numOfLights = 4;
SetShaderValue(shader, numOfLightsLoc, &numOfLights, SHADER_UNIFORM_INT);
Color ambCol = (Color){26,32,135,255};
Color ambCol = (Color){ 26,32,135,255 };
Vector3 ambColNormalized = (Vector3){ ambCol.r / 255.0f, ambCol.g / 255.0f, ambCol.b / 255.0f };
float ambIntens = 0.02;
int albedoLoc = GetShaderLocation(shader, "albedo");
PBRSetAmbient(shader,ambCol,ambIntens);
int ambColLoc = GetShaderLocation(shader, "ambientColor");
int ambLoc = GetShaderLocation(shader, "ambient");
SetShaderValue(shader, ambColLoc, &ambColNormalized, SHADER_UNIFORM_VEC3);
SetShaderValue(shader, ambLoc, &ambIntens, SHADER_UNIFORM_FLOAT);
int emissiveIntensityLoc = GetShaderLocation(shader, "emissivePower");
int emissiveColorLoc = GetShaderLocation(shader, "emissiveColor");
int textureTilingLoc = GetShaderLocation(shader, "tiling");
Model model = LoadModel("resources/models/old_car_new.glb");
// If the OBJ file format is used, we will have to generate tangents manually:
// GenMeshTangents(&model.meshes[0]);
model.materials[0].shader = shader;
model.materials[0].maps[MATERIAL_MAP_ALBEDO].color = WHITE;
model.materials[0].maps[MATERIAL_MAP_METALNESS].value = 0.0f;
model.materials[0].maps[MATERIAL_MAP_ROUGHNESS].value = 0.0f;
model.materials[0].maps[MATERIAL_MAP_OCCLUSION].value = 1.0f;
model.materials[0].maps[MATERIAL_MAP_EMISSION].color = (Color){ 255, 162, 0, 255 };
model.materials[0].maps[MATERIAL_MAP_ALBEDO].texture = LoadTexture("resources/old_car_d.png");
model.materials[0].maps[MATERIAL_MAP_METALNESS].texture = LoadTexture("resources/old_car_mra.png");
model.materials[0].maps[MATERIAL_MAP_NORMAL].texture = LoadTexture("resources/old_car_n.png");
model.materials[0].maps[MATERIAL_MAP_EMISSION].texture = LoadTexture("resources/old_car_e.png");
// We store tiling parameters in the generic parameter slots in the Material class
Vector2 modelTiling = (Vector2){ 0.5f, 0.5f };
Model floor = LoadModel("resources/models/plane.glb");
floor.materials[0].shader = shader;
floor.materials[0].maps[MATERIAL_MAP_ALBEDO].color = WHITE;
floor.materials[0].maps[MATERIAL_MAP_METALNESS].value = 0.0f;
floor.materials[0].maps[MATERIAL_MAP_ROUGHNESS].value = 0.0f;
floor.materials[0].maps[MATERIAL_MAP_OCCLUSION].value = 1.0f;
floor.materials[0].maps[MATERIAL_MAP_EMISSION].color = BLACK;
floor.materials[0].maps[MATERIAL_MAP_ALBEDO].texture = LoadTexture("resources/road_a.png");
floor.materials[0].maps[MATERIAL_MAP_METALNESS].texture = LoadTexture("resources/road_mra.png");
floor.materials[0].maps[MATERIAL_MAP_NORMAL].texture = LoadTexture("resources/road_n.png");
Vector2 floorTiling = (Vector2){ 0.5f, 0.5f };
// Create lights
PBRLight lights[MAX_LIGHTS] = { 0 };
@ -98,7 +153,13 @@ int main()
lights[1] = PBRLightCreate(LIGHT_POINT, (Vector3){ 2, 1, 1 }, (Vector3){0,0,0}, GREEN,3.3, shader);
lights[2] = PBRLightCreate(LIGHT_POINT, (Vector3){ -2, 1, 1 }, (Vector3){0,0,0}, RED,8.3, shader);
lights[3] = PBRLightCreate(LIGHT_POINT, (Vector3){ 1, 1, -2 }, (Vector3){0,0,0}, BLUE,2, shader);
SetShaderValueV(shader, GetShaderLocation(shader, "lights"), lights, SHADER_UNIFORM_FLOAT, numOfLights);
// The textures are always used
int one = 1;
SetShaderValue(shader, GetShaderLocation(shader, "useTexAlbedo"), &one, SHADER_UNIFORM_INT);
SetShaderValue(shader, GetShaderLocation(shader, "useTexNormal"), &one, SHADER_UNIFORM_INT);
SetShaderValue(shader, GetShaderLocation(shader, "useTexMRA"), &one, SHADER_UNIFORM_INT);
SetShaderValue(shader, GetShaderLocation(shader, "useTexEmissive"), &one, SHADER_UNIFORM_INT);
SetTargetFPS(60); // Set our game to run at 60 frames-per-second-------------------------------------------------------------
@ -122,32 +183,45 @@ int main()
// Update light values (actually, only enable/disable them)
for (int i = 0; i < MAX_LIGHTS; i++) PBRLightUpdate(shader, lights[i]);
emissiveCnt--;
if(emissiveCnt<=0){
emissiveCnt = GetRandomValue(0,20);
PBRSetFloat(&model_mat,PBR_PARAM_EMISSIVE,(float)GetRandomValue(0,100)/100);
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(BLACK);
BeginMode3D(camera);
SetShaderValue(shader, textureTilingLoc, &floorTiling, SHADER_UNIFORM_VEC2);
Vector4 floorEmission = ColorNormalize(floor.materials[0].maps[MATERIAL_MAP_EMISSION].color);
SetShaderValue(shader, emissiveColorLoc, &floorEmission, SHADER_UNIFORM_VEC4);
DrawModel(floor, (Vector3){0,0,0}, 5.0f, WHITE);
PBRDrawModel(floor, (Vector3){0,0,0}, 5.0f);
PBRDrawModel(model, (Vector3) {0, 0.0, 0}, 0.005);
emissiveCnt--;
if (emissiveCnt <= 0)
{
emissiveCnt = GetRandomValue(0, 20);
float intensity = (float)GetRandomValue(0, 100) / 100;
SetShaderValue(shader, emissiveIntensityLoc, &intensity, SHADER_UNIFORM_FLOAT);
}
SetShaderValue(shader, textureTilingLoc, &modelTiling, SHADER_UNIFORM_VEC2);
Vector4 modelEmission = ColorNormalize(model.materials[0].maps[MATERIAL_MAP_EMISSION].color);
SetShaderValue(shader, emissiveColorLoc, &modelEmission, SHADER_UNIFORM_VEC4);
DrawModel(model, (Vector3) {0, 0.0, 0}, 0.005, WHITE);
// Draw spheres to show where the lights are
for (int i = 0; i < MAX_LIGHTS; i++) {
for (int i = 0; i < MAX_LIGHTS; i++)
{
Color col = (Color) {lights[i].color[0] * 255, lights[i].color[1] * 255, lights[i].color[2] * 255,
lights[i].color[3] * 255};
if (lights[i].enabled) DrawSphereEx(lights[i].position, 0.2f, 8, 8, col);
else DrawSphereWires(lights[i].position, 0.2f, 8, 8, ColorAlpha(col, 0.3f));
}
EndMode3D();
DrawText("(c) Old Rusty Car model by Renafox (https://skfb.ly/LxRy)", screenWidth - 320, screenHeight - 20, 10, GRAY);
DrawText("(c) Old Rusty Car model by Renafox (https://skfb.ly/LxRy)", screenWidth - 320, screenHeight - 20, 10, LIGHTGRAY);
DrawFPS(10, 10);
EndDrawing();
@ -157,15 +231,65 @@ int main()
//--------------------------------------------------------------------------------------
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadModel(floor.model); // Unload model
UnloadModel(model.model); // Unload model
model.materials[0].shader = (Shader){ 0 };
floor.materials[0].shader = (Shader){ 0 };
UnloadMaterial(model.materials[0]);
UnloadMaterial(floor.materials[0]);
model.materials[0].maps = NULL;
floor.materials[0].maps = NULL;
UnloadModel(floor); // Unload model
UnloadModel(model); // Unload model
UnloadShader(shader); // Unload Shader
UnloadPBRMaterial(floor_mat); // Unload PBRMaterial
UnloadPBRMaterial(model_mat); // Unload PBRMaterial
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
PBRLight PBRLightCreate(int type, Vector3 position, Vector3 target, Color color, float intensity, Shader shader)
{
PBRLight light = { 0 };
if (lightsCount < MAX_LIGHTS)
{
light.enabled = 1;
light.type = type;
light.position = position;
light.target = target;
light.color[0] = (float)color.r / (float)255;
light.color[1] = (float)color.g / (float)255;
light.color[2] = (float)color.b / (float)255;
light.color[3] = (float)color.a / (float)255;
light.intensity = intensity;
// NOTE: Lighting shader naming must be the provided ones
light.enabledLoc = GetShaderLocation(shader, TextFormat("lights[%i].enabled", lightsCount));
light.typeLoc = GetShaderLocation(shader, TextFormat("lights[%i].type", lightsCount));
light.positionLoc = GetShaderLocation(shader, TextFormat("lights[%i].position", lightsCount));
light.targetLoc = GetShaderLocation(shader, TextFormat("lights[%i].target", lightsCount));
light.colorLoc = GetShaderLocation(shader, TextFormat("lights[%i].color", lightsCount));
light.intensityLoc = GetShaderLocation(shader, TextFormat("lights[%i].intensity", lightsCount));
PBRLightUpdate(shader, light);
lightsCount++;
}
return light;
}
// Send light properties to shader
// NOTE: Light shader locations should be available
void PBRLightUpdate(Shader shader, PBRLight light)
{
SetShaderValue(shader, light.enabledLoc, &light.enabled, SHADER_UNIFORM_INT);
SetShaderValue(shader, light.typeLoc, &light.type, SHADER_UNIFORM_INT);
// Send to shader light position values
float position[3] = { light.position.x, light.position.y, light.position.z };
SetShaderValue(shader, light.positionLoc, position, SHADER_UNIFORM_VEC3);
// Send to shader light target position values
float target[3] = { light.target.x, light.target.y, light.target.z };
SetShaderValue(shader, light.targetLoc, target, SHADER_UNIFORM_VEC3);
SetShaderValue(shader, light.colorLoc, light.color, SHADER_UNIFORM_VEC4);
SetShaderValue(shader, light.intensityLoc, &light.intensity, SHADER_UNIFORM_FLOAT);
}