LightingShaderLightScatteringFoliageImplementation.cpp

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#include <tdme/engine/subsystems/lighting/LightingShaderLightScatteringFoliageImplementation.h>
 
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/Engine.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::LightingShaderBaseImplementation;
using tdme::engine::subsystems::lighting::LightingShaderLightScatteringFoliageImplementation;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::os::filesystem::FileSystem;
using tdme::os::filesystem::FileSystemInterface;
 
bool LightingShaderLightScatteringFoliageImplementation::isSupported(Renderer* renderer) {
    return renderer->getShaderVersion() == "gl3";
}
 
LightingShaderLightScatteringFoliageImplementation::LightingShaderLightScatteringFoliageImplementation(Renderer* renderer): LightingShaderBaseImplementation(renderer)
{
}
 
const string LightingShaderLightScatteringFoliageImplementation::getId() {
    return "ls_foliage";
}
 
void LightingShaderLightScatteringFoliageImplementation::initialize()
{
    auto shaderVersion = renderer->getShaderVersion();
 
    // lighting
    //  fragment shader
    fragmentShaderId = renderer->loadShader(
        renderer->SHADER_FRAGMENT_SHADER,
        "shader/" + shaderVersion + "/lighting/light_scattering",
        "render_fragmentshader.frag",
        "#define LIGHT_COUNT " + to_string(Engine::LIGHTS_MAX) + "\n"
    );
    if (fragmentShaderId == 0) return;
 
    //  vertex shader
    vertexShaderId = renderer->loadShader(
        renderer->SHADER_VERTEX_SHADER,
        "shader/" + shaderVersion + "/lighting/light_scattering",
        "render_vertexshader.vert",
        "#define LIGHT_COUNT " + to_string(Engine::LIGHTS_MAX) + "\n#define HAVE_FOLIAGE",
        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"
        )
    );
    if (vertexShaderId == 0) return;
 
    // create, attach and link program
    programId = renderer->createProgram(renderer->PROGRAM_OBJECTS);
    renderer->attachShaderToProgram(programId, vertexShaderId);
    renderer->attachShaderToProgram(programId, fragmentShaderId);
 
    //
    LightingShaderBaseImplementation::initialize();
 
    //
    if (initialized == false) return;
 
    // uniforms
    uniformSpeed = renderer->getProgramUniformLocation(programId, "speed");
    uniformAmplitudeDefault = renderer->getProgramUniformLocation(programId, "amplitudeDefault");
    uniformAmplitudeMax = renderer->getProgramUniformLocation(programId, "amplitudeMax");
}
 
void LightingShaderLightScatteringFoliageImplementation::registerShader() {
}
 
void LightingShaderLightScatteringFoliageImplementation::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());
}