ShadowMapRenderShaderBaseImplementation.cpp

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#include <tdme/engine/subsystems/shadowmapping/ShadowMapRenderShaderBaseImplementation.h>
 
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/lighting/LightingShader.h>
#include <tdme/engine/subsystems/lighting/LightingShaderConstants.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/subsystems/shadowmapping/ShadowMap.h>
#include <tdme/engine/subsystems/shadowmapping/ShadowMapping.h>
#include <tdme/engine/Engine.h>
#include <tdme/engine/Timing.h>
#include <tdme/math/Math.h>
#include <tdme/math/Matrix4x4.h>
#include <tdme/math/Vector3.h>
#include <tdme/os/filesystem/FileSystem.h>
#include <tdme/os/filesystem/FileSystemInterface.h>
 
using std::to_string;
 
using tdme::engine::subsystems::lighting::LightingShader;
using tdme::engine::subsystems::lighting::LightingShaderConstants;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::subsystems::shadowmapping::ShadowMap;
using tdme::engine::subsystems::shadowmapping::ShadowMapping;
using tdme::engine::subsystems::shadowmapping::ShadowMapRenderShaderBaseImplementation;
using tdme::engine::Engine;
using tdme::engine::Timing;
using tdme::math::Math;
using tdme::math::Matrix4x4;
using tdme::math::Vector3;
using tdme::os::filesystem::FileSystem;
using tdme::os::filesystem::FileSystemInterface;
 
ShadowMapRenderShaderBaseImplementation::ShadowMapRenderShaderBaseImplementation(Renderer* renderer)
{
    this->renderer = renderer;
    initialized = false;
}
 
ShadowMapRenderShaderBaseImplementation::~ShadowMapRenderShaderBaseImplementation()
{
}
 
bool ShadowMapRenderShaderBaseImplementation::isInitialized()
{
    return initialized;
}
 
void ShadowMapRenderShaderBaseImplementation::initialize()
{
    auto shaderVersion = renderer->getShaderVersion();
 
    // map inputs to attributes
    if (renderer->isUsingProgramAttributeLocation() == true) {
        renderer->setProgramAttributeLocation(programId, 0, "inVertex");
        renderer->setProgramAttributeLocation(programId, 1, "inNormal");
        renderer->setProgramAttributeLocation(programId, 2, "inTextureUV");
        renderer->setProgramAttributeLocation(programId, 4, "inOrigin");
    }
    // link
    if (renderer->linkProgram(programId) == false)
        return;
 
    //  uniforms
    renderUniformShadowMapLookUps = renderer->getProgramUniformLocation(programId, "shadowMapLookUps");
    uniformTextureAtlasSize = renderer->getProgramUniformLocation(programId, "textureAtlasSize");
    if (uniformTextureAtlasSize == -1) return;
    uniformTextureAtlasPixelDimension = renderer->getProgramUniformLocation(programId, "textureAtlasPixelDimension");
    if (uniformTextureAtlasPixelDimension == -1) return;
    uniformTextureUnit = renderer->getProgramUniformLocation(programId, "textureUnit");
    if (uniformTextureUnit == -1) return;
    renderUniformTexturePixelWidth = renderer->getProgramUniformLocation(programId, "texturePixelWidth");
    if (renderUniformTexturePixelWidth == -1) return;
    renderUniformTexturePixelHeight = renderer->getProgramUniformLocation(programId, "texturePixelHeight");
    if (renderUniformTexturePixelHeight == -1) return;
    renderUniformDepthBiasMVPMatrix = renderer->getProgramUniformLocation(programId, "depthBiasMVPMatrix");
    if (renderUniformDepthBiasMVPMatrix == -1) return;
    if (renderer->isInstancedRenderingAvailable() == true) {
        renderUniformProjectionMatrix = renderer->getProgramUniformLocation(programId, "projectionMatrix");
        if (renderUniformProjectionMatrix == -1) return;
        renderUniformCameraMatrix = renderer->getProgramUniformLocation(programId, "cameraMatrix");
        if (renderUniformCameraMatrix == -1) return;
    } else {
        renderUniformMVPMatrix = renderer->getProgramUniformLocation(programId, "mvpMatrix");
        if (renderUniformMVPMatrix == -1) return;
        renderUniformNormalMatrix = renderer->getProgramUniformLocation(programId, "normalMatrix");
        if (renderUniformNormalMatrix == -1) return;
        renderUniformModelTranslation = renderer->getProgramUniformLocation(programId, "modelTranslation");
    }
    uniformTextureMatrix = renderer->getProgramUniformLocation(programId, "textureMatrix");
    if (uniformTextureMatrix == -1) return;
    uniformDiffuseTextureUnit = renderer->getProgramUniformLocation(programId, "diffuseTextureUnit");
    if (uniformDiffuseTextureUnit == -1) return;
    uniformDiffuseTextureAvailable = renderer->getProgramUniformLocation(programId, "diffuseTextureAvailable");
    if (uniformDiffuseTextureAvailable == -1) return;
    uniformDiffuseTextureMaskedTransparency = renderer->getProgramUniformLocation(programId, "diffuseTextureMaskedTransparency");
    if (uniformDiffuseTextureMaskedTransparency == -1) return;
    uniformDiffuseTextureMaskedTransparencyThreshold = renderer->getProgramUniformLocation(programId, "diffuseTextureMaskedTransparencyThreshold");
    if (uniformDiffuseTextureMaskedTransparencyThreshold == -1) return;
    renderUniformLightDirection = renderer->getProgramUniformLocation(programId, "lightDirection");
    if (renderUniformLightDirection == -1) return;
    if (shaderVersion != "gl2") {
        if (renderer->isInstancedRenderingAvailable() == false) {
            renderUniformMVMatrix = renderer->getProgramUniformLocation(programId, "mvMatrix");
            if (renderUniformMVMatrix == -1) return;
        }
        renderUniformLightPosition = renderer->getProgramUniformLocation(programId, "lightPosition");
        if (renderUniformLightPosition == -1) return;
        renderUniformLightSpotExponent = renderer->getProgramUniformLocation(programId, "lightSpotExponent");
        if (renderUniformLightSpotExponent == -1) return;
        renderUniformLightSpotCosCutoff = renderer->getProgramUniformLocation(programId, "lightSpotCosCutoff");
        if (renderUniformLightSpotCosCutoff == -1) return;
        renderUniformLightConstantAttenuation = renderer->getProgramUniformLocation(programId, "lightConstantAttenuation");
        if (renderUniformLightConstantAttenuation == -1) return;
        renderUniformLightLinearAttenuation = renderer->getProgramUniformLocation(programId, "lightLinearAttenuation");
        if (renderUniformLightLinearAttenuation == -1) return;
        renderUniformLightQuadraticAttenuation = renderer->getProgramUniformLocation(programId, "lightQuadraticAttenuation");
        if (renderUniformLightQuadraticAttenuation == -1) return;
    }
 
    //
    renderUniformTime = renderer->getProgramUniformLocation(programId, "time");
 
    //
    initialized = true;
}
 
void ShadowMapRenderShaderBaseImplementation::useProgram(Engine* engine, int contextIdx)
{
    renderer->useProgram(contextIdx, programId);
    renderer->setLighting(contextIdx, renderer->LIGHTING_SPECULAR);
    renderer->setProgramUniformInteger(contextIdx, uniformTextureUnit, ShadowMap::TEXTUREUNIT);
    renderer->setProgramUniformInteger(contextIdx, uniformDiffuseTextureUnit, LightingShaderConstants::SPECULAR_TEXTUREUNIT_DIFFUSE);
    renderer->setProgramUniformInteger(contextIdx, uniformDiffuseTextureAvailable, 0);
    if (renderUniformTime != -1) renderer->setProgramUniformFloat(contextIdx, renderUniformTime, static_cast<float>(engine->getTiming()->getTotalTime()) / 1000.0f);
    if (renderUniformShadowMapLookUps != -1) renderer->setProgramUniformInteger(contextIdx, renderUniformShadowMapLookUps, Engine::getShadowMapRenderLookUps());
}
 
void ShadowMapRenderShaderBaseImplementation::unUseProgram(int contextIdx)
{
}
 
void ShadowMapRenderShaderBaseImplementation::updateMatrices(int contextIdx) {
    if (renderer->isInstancedRenderingAvailable() == true) {
        renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformProjectionMatrix, renderer->getProjectionMatrix().getArray());
        renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformCameraMatrix, renderer->getCameraMatrix().getArray());
    } else {
        Matrix4x4 mvMatrix;
        Matrix4x4 mvpMatrix;
        Matrix4x4 normalMatrix;
        Vector3 modelTranslation;
        // model view matrix
        mvMatrix.set(renderer->getModelViewMatrix()).multiply(renderer->getCameraMatrix());
        // object to screen matrix
        mvpMatrix.set(mvMatrix).multiply(renderer->getProjectionMatrix());
        // normal matrix
        normalMatrix.set(renderer->getModelViewMatrix()).invert().transpose();
        // model translation
        renderer->getModelViewMatrix().getTranslation(modelTranslation);
        // upload
        if (renderUniformMVMatrix != -1) renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformMVMatrix, mvMatrix.getArray());
        renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformMVPMatrix, mvpMatrix.getArray());
        renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformNormalMatrix, normalMatrix.getArray());
        if (renderUniformModelTranslation != -1) renderer->setProgramUniformFloatVec3(contextIdx, renderUniformModelTranslation, modelTranslation.getArray());
    }
}
 
void ShadowMapRenderShaderBaseImplementation::updateTextureMatrix(Renderer* renderer, int contextIdx) {
    renderer->setProgramUniformFloatMatrix3x3(contextIdx, uniformTextureMatrix, renderer->getTextureMatrix(contextIdx).getArray());
}
 
void ShadowMapRenderShaderBaseImplementation::updateMaterial(Renderer* renderer, int contextIdx)
{
    auto material = renderer->getSpecularMaterial(contextIdx);
    renderer->setProgramUniformInteger(contextIdx, uniformDiffuseTextureMaskedTransparency, material.diffuseTextureMaskedTransparency);
    renderer->setProgramUniformFloat(contextIdx, uniformDiffuseTextureMaskedTransparencyThreshold, material.diffuseTextureMaskedTransparencyThreshold);
    renderer->setProgramUniformInteger(contextIdx, uniformTextureAtlasSize, material.textureAtlasSize);
    renderer->setProgramUniformFloatVec2(contextIdx, uniformTextureAtlasPixelDimension, material.textureAtlasPixelDimension);
}
 
void ShadowMapRenderShaderBaseImplementation::updateLight(Renderer* renderer, int contextIdx, int32_t lightId) {
    if (lightId != this->lightId) {
        return;
    }
 
    auto& light = renderer->getLight(contextIdx, lightId);
    auto lightPosition = Vector3(light.position[0], light.position[1], light.position[2]);
    auto lightSpotDirection = Vector3(light.spotDirection[0], light.spotDirection[1], light.spotDirection[2]);
    if (renderUniformLightPosition != -1) renderer->setProgramUniformFloatVec3(contextIdx, renderUniformLightPosition, lightPosition.getArray());
    if (renderUniformLightDirection != -1) renderer->setProgramUniformFloatVec3(contextIdx, renderUniformLightDirection, lightSpotDirection.getArray());
    if (renderUniformLightSpotExponent != -1) renderer->setProgramUniformFloat(contextIdx, renderUniformLightSpotExponent, light.spotExponent);
    if (renderUniformLightSpotCosCutoff != -1) renderer->setProgramUniformFloat(contextIdx, renderUniformLightSpotCosCutoff, light.spotCosCutoff);
    if (renderUniformLightConstantAttenuation != -1) renderer->setProgramUniformFloat(contextIdx, renderUniformLightConstantAttenuation, light.constantAttenuation);
    if (renderUniformLightLinearAttenuation != -1) renderer->setProgramUniformFloat(contextIdx, renderUniformLightLinearAttenuation, light.linearAttenuation);
    if (renderUniformLightQuadraticAttenuation != -1) renderer->setProgramUniformFloat(contextIdx, renderUniformLightQuadraticAttenuation, light.quadraticAttenuation);
    if (renderer->isInstancedRenderingAvailable() == true) {
        renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformProjectionMatrix, renderer->getProjectionMatrix().getArray());
        renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformCameraMatrix, renderer->getCameraMatrix().getArray());
    }
    renderer->setProgramUniformFloat(contextIdx, renderUniformTexturePixelWidth, 1.0f / static_cast<float>(Engine::getShadowMapWidth()));
    renderer->setProgramUniformFloat(contextIdx, renderUniformTexturePixelHeight, 1.0f / static_cast<float>(Engine::getShadowMapHeight()));
}
 
void ShadowMapRenderShaderBaseImplementation::bindTexture(Renderer* renderer, int contextIdx, int32_t textureId)
{
    switch (renderer->getTextureUnit(contextIdx)) {
        case LightingShaderConstants::SPECULAR_TEXTUREUNIT_DIFFUSE:
            renderer->setProgramUniformInteger(contextIdx, uniformDiffuseTextureAvailable, textureId == 0 ? 0 : 1);
            break;
    }
}
 
void ShadowMapRenderShaderBaseImplementation::setDepthBiasMVPMatrix(int contextIdx, const Matrix4x4& depthBiasMVPMatrix)
{
    renderer->setProgramUniformFloatMatrix4x4(contextIdx, renderUniformDepthBiasMVPMatrix, depthBiasMVPMatrix.getArray());
}
 
void ShadowMapRenderShaderBaseImplementation::setRenderLightId(int32_t lightId) {
    this->lightId = lightId;
}