LightingShaderPBRFoliageImplementation.cpp

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#include <tdme/engine/subsystems/lighting/LightingShaderPBRFoliageImplementation.h>
 
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/lighting/LightingShaderPBRBaseImplementation.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/Engine.h>
#include <tdme/engine/EntityShaderParameters.h>
#include <tdme/engine/ShaderParameter.h>
#include <tdme/engine/Timing.h>
#include <tdme/os/filesystem/FileSystem.h>
#include <tdme/os/filesystem/FileSystemInterface.h>
 
using std::string;
using std::to_string;
 
using tdme::engine::subsystems::lighting::LightingShaderPBRBaseImplementation;
using tdme::engine::subsystems::lighting::LightingShaderPBRFoliageImplementation;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::engine::EntityShaderParameters;
using tdme::engine::ShaderParameter;
using tdme::engine::Timing;
using tdme::os::filesystem::FileSystem;
using tdme::os::filesystem::FileSystemInterface;
 
bool LightingShaderPBRFoliageImplementation::isSupported(Renderer* renderer) {
    return renderer->isPBRAvailable();
}
 
LightingShaderPBRFoliageImplementation::LightingShaderPBRFoliageImplementation(Renderer* renderer): LightingShaderPBRBaseImplementation(renderer)
{
}
 
const string LightingShaderPBRFoliageImplementation::getId() {
    return "pbr-foliage";
}
 
void LightingShaderPBRFoliageImplementation::initialize()
{
    auto shaderVersion = renderer->getShaderVersion();
 
    // lighting
    //  vertex shader
    vertexShaderId = renderer->loadShader(
        renderer->SHADER_VERTEX_SHADER,
        "shader/" + shaderVersion + "/lighting/pbr",
        "render_vertexshader.vert",
        string() +
        "#define LIGHT_COUNT " + to_string(Engine::LIGHTS_MAX) + "\n#define USE_PUNCTUAL\n#define MATERIAL_METALLICROUGHNESS\n#define HAVE_FOLIAGE\n#define USE_IBL\n",
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions",
            "create_rotation_matrix.inc.glsl"
        ) +
        "\n\n" +
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions",
            "create_translation_matrix.inc.glsl"
        ) +
        "\n\n" +
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions",
            "create_foliage_transform_matrix.inc.glsl"
        ) + "\n\n"
    );
    if (vertexShaderId == 0) return;
 
    //  fragment shader
    fragmentShaderId = renderer->loadShader(
        renderer->SHADER_FRAGMENT_SHADER,
        "shader/" + shaderVersion + "/lighting/pbr",
        "render_fragmentshader.frag",
        string() +
        "#define LIGHT_COUNT " + to_string(Engine::LIGHTS_MAX) + "\n#define USE_PUNCTUAL\n#define MATERIAL_METALLICROUGHNESS\n#define HAVE_FOLIAGE\n#define USE_IBL\n",
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions/pbr",
            "tonemapping.inc.glsl"
        ) +
        "\n\n" +
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions/pbr",
            "textures.inc.glsl"
        ) +
        "\n\n" +
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions/pbr",
            "functions.inc.glsl"
        ) +
        "\n\n" +
        FileSystem::getInstance()->getContentAsString(
            "shader/" + shaderVersion + "/functions/pbr",
            "pbr_lighting.inc.glsl"
        ) +
        "\n\n"
    );
    if (fragmentShaderId == 0) return;
 
    // create, attach and link program
    programId = renderer->createProgram(renderer->PROGRAM_OBJECTS);
    renderer->attachShaderToProgram(programId, vertexShaderId);
    renderer->attachShaderToProgram(programId, fragmentShaderId);
 
    //
    LightingShaderPBRBaseImplementation::initialize();
 
    //
    if (initialized == false) return;
 
    //
    initialized = false;
 
    // uniforms
    uniformSpeed = renderer->getProgramUniformLocation(programId, "speed");
    if (uniformSpeed == -1) return;
    uniformTime = renderer->getProgramUniformLocation(programId, "time");
    if (uniformTime == -1) return;
    uniformAmplitudeDefault = renderer->getProgramUniformLocation(programId, "amplitudeDefault");
    if (uniformAmplitudeDefault == -1) return;
    uniformAmplitudeMax = renderer->getProgramUniformLocation(programId, "amplitudeMax");
    if (uniformAmplitudeMax == -1) return;
 
    //
    initialized = true;
}
 
void LightingShaderPBRFoliageImplementation::registerShader() {
    Engine::registerShader(
        Engine::ShaderType::SHADERTYPE_OBJECT,
        getId(),
        {
            { "speed", ShaderParameter(1.0f), ShaderParameter(0.0f), ShaderParameter(20.0f), ShaderParameter(1.0f) },
            { "amplitudeDefault", ShaderParameter(0.0f), ShaderParameter(-45.0f), ShaderParameter(45.0f), ShaderParameter(4.5f) },
            { "amplitudeMax", ShaderParameter(20.0f), ShaderParameter(-45.0f), ShaderParameter(45.0f), ShaderParameter(4.5f) },
        }
    );
}
 
void LightingShaderPBRFoliageImplementation::useProgram(Engine* engine, int contextIdx)
{
    LightingShaderPBRBaseImplementation::useProgram(engine, contextIdx);
 
    // time
    if (uniformTime != -1) renderer->setProgramUniformFloat(contextIdx, uniformTime, static_cast<float>(engine->getTiming()->getTotalTime()) / 1000.0f);
}
 
void LightingShaderPBRFoliageImplementation::updateShaderParameters(Renderer* renderer, int contextIdx) {
    const auto& shaderParameters = renderer->getShaderParameters(contextIdx);
    if (uniformSpeed != -1) renderer->setProgramUniformFloat(contextIdx, uniformSpeed, shaderParameters.getShaderParameter("speed").getFloatValue());
    if (uniformAmplitudeDefault != -1) renderer->setProgramUniformFloat(contextIdx, uniformAmplitudeDefault, shaderParameters.getShaderParameter("amplitudeDefault").getFloatValue());
    if (uniformAmplitudeMax != -1) renderer->setProgramUniformFloat(contextIdx, uniformAmplitudeMax, shaderParameters.getShaderParameter("amplitudeMax").getFloatValue());
}