LightingShaderTerrainEditorImplementation.cpp

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#include <tdme/engine/subsystems/lighting/LightingShaderTerrainEditorImplementation.h>
 
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/lighting/LightingShaderConstants.h>
#include <tdme/engine/subsystems/lighting/LightingShaderTerrainImplementation.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/Engine.h>
#include <tdme/math/Matrix3x3.h>
#include <tdme/math/Vector2.h>
 
using std::string;
using std::to_string;
 
using tdme::engine::subsystems::lighting::LightingShaderConstants;
using tdme::engine::subsystems::lighting::LightingShaderTerrainEditorImplementation;
using tdme::engine::subsystems::lighting::LightingShaderTerrainImplementation;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::math::Matrix3x3;
using tdme::math::Vector2;
 
LightingShaderTerrainEditorImplementation::LightingShaderTerrainEditorImplementation(Renderer* renderer): LightingShaderTerrainImplementation(renderer)
{
    additionalDefinitions = "\n#define HAVE_TERRAIN_SHADER_EDITOR";
}
 
const string LightingShaderTerrainEditorImplementation::getId() {
    return "terraineditor";
}
 
void LightingShaderTerrainEditorImplementation::initialize()
{
    LightingShaderTerrainImplementation::initialize();
 
    if (initialized == false) return;
 
    //
    initialized = false;
 
    uniformBrushEnabled = renderer->getProgramUniformLocation(programId, "brushEnabled");
    if (uniformBrushEnabled == -1) return;
 
    uniformBrushTextureMatrix = renderer->getProgramUniformLocation(programId, "brushTextureMatrix");
    if (uniformBrushTextureMatrix == -1) return;
 
    uniformBrushTextureUnit = renderer->getProgramUniformLocation(programId, "brushTextureUnit");
    if (uniformBrushTextureUnit == -1) return;
 
    uniformBrushPosition = renderer->getProgramUniformLocation(programId, "brushPosition");
    if (uniformBrushPosition == -1) return;
 
    uniformBrushTextureDimension = renderer->getProgramUniformLocation(programId, "brushTextureDimension");
    if (uniformBrushTextureDimension == -1) return;
 
    //
    initialized = true;
}
 
void LightingShaderTerrainEditorImplementation::registerShader() {
    Engine::registerShader(
        Engine::ShaderType::SHADERTYPE_OBJECT,
        getId(),
        {
            { "brushEnabled", ShaderParameter(true) },
            { "brushDimension", ShaderParameter(Vector2(0.0f, 0.0f)) },
            { "brushTexture", ShaderParameter(0) },
            { "brushRotation", ShaderParameter(0.0f) },
            { "brushScale", ShaderParameter(Vector2(1.0f, 1.0f)) },
            { "brushPosition", ShaderParameter(Vector2(0.0f, 0.0f)) }
        },
        true
    );
}
 
void LightingShaderTerrainEditorImplementation::useProgram(Engine* engine, int contextIdx) {
    LightingShaderTerrainImplementation::useProgram(engine, contextIdx);
 
    //
    auto currentTextureUnit = renderer->getTextureUnit(contextIdx);
    renderer->setTextureUnit(contextIdx, LightingShaderConstants::SPECULAR_TEXTUREUNIT_TERRAIN_BRUSH);
    renderer->bindTexture(contextIdx, engine->getShaderParameter(getId(), "brushTexture").getIntegerValue());
    renderer->setTextureUnit(contextIdx, currentTextureUnit);
 
    //
    Matrix3x3 brushTextureMatrix;
    brushTextureMatrix.identity();
    brushTextureMatrix.multiply((Matrix3x3()).identity().setTranslation(Vector2(0.5f, 0.5f)));
    brushTextureMatrix.multiply((Matrix3x3()).identity().scale(
        Vector2(
            1.0f / engine->getShaderParameter(getId(), "brushScale").getVector2Value().getX(),
            1.0f / engine->getShaderParameter(getId(), "brushScale").getVector2Value().getY()
        )
    ));
    brushTextureMatrix.multiply((Matrix3x3()).identity().setAxes(engine->getShaderParameter(getId(), "brushRotation").getFloatValue()));
 
    //
    renderer->setProgramUniformInteger(contextIdx, uniformBrushEnabled, engine->getShaderParameter(getId(), "brushEnabled").getBooleanValue() == true?1:0);
    renderer->setProgramUniformInteger(contextIdx, uniformBrushTextureUnit, LightingShaderConstants::SPECULAR_TEXTUREUNIT_TERRAIN_BRUSH);
    renderer->setProgramUniformFloatMatrix3x3(contextIdx, uniformBrushTextureMatrix, brushTextureMatrix.getArray());
    renderer->setProgramUniformFloatVec2(contextIdx, uniformBrushTextureDimension, engine->getShaderParameter(getId(), "brushDimension").getVector2Value().getArray());
    renderer->setProgramUniformFloatVec2(contextIdx, uniformBrushPosition, engine->getShaderParameter(getId(), "brushPosition").getVector2Value().getArray());
}