279 lines
10 KiB
C++
279 lines
10 KiB
C++
#include "PlanetObject.h"
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#include <random>
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#include <cmath>
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#include "OpenGlExtensions.h"
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#include "Environment.h"
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namespace ZL {
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PlanetObject::PlanetObject()
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{
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}
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void PlanetObject::init() {
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// 1. Инициализируем данные (генерация мешей)
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planetData.init();
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// 2. Забираем данные для VBO
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// Берем максимальный LOD для начальной отрисовки
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int lodIndex = planetData.getMaxLodIndex();
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planetRenderStruct.data = planetData.getLodLevel(lodIndex).vertexData;
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planetRenderStruct.RefreshVBO();
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sandTexture = std::make_unique<Texture>(CreateTextureDataFromPng("./resources/sand.png", ""));
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// Атмосфера
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planetAtmosphereRenderStruct.data = planetData.getAtmosphereLod().vertexData;
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planetAtmosphereRenderStruct.RefreshVBO();
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}
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void PlanetObject::prepareDrawData() {
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if (!drawDataDirty) return;
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drawDataDirty = false;
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}
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void PlanetObject::update(float deltaTimeMs) {
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// Получаем видимые треугольники, передавая позицию корабля
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auto lr = planetData.getTrianglesUnderCamera(Environment::shipPosition);
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int currentLod = planetData.getCurrentLodIndex();
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const auto& fullMesh = planetData.getLodLevel(currentLod).vertexData;
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planetRenderRedStruct.data.PositionData.clear();
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planetRenderRedStruct.data.TexCoordData.clear();
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// ... очистка остальных буферов ...
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planetRenderYellowStruct.data.PositionData.clear();
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planetRenderYellowStruct.data.TexCoordData.clear();
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std::set<int> usedYellow;
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// Заполняем красный (текущий треугольник под камерой)
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for (int i : lr) {
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planetRenderRedStruct.data.PositionData.push_back(fullMesh.PositionData[i * 3]);
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planetRenderRedStruct.data.PositionData.push_back(fullMesh.PositionData[i * 3 + 1]);
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planetRenderRedStruct.data.PositionData.push_back(fullMesh.PositionData[i * 3 + 2]);
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planetRenderRedStruct.data.TexCoordData.push_back(fullMesh.TexCoordData[i * 3]);
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planetRenderRedStruct.data.TexCoordData.push_back(fullMesh.TexCoordData[i * 3 + 1]);
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planetRenderRedStruct.data.TexCoordData.push_back(fullMesh.TexCoordData[i * 3 + 2]);
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usedYellow.insert(i);
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}
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planetRenderRedStruct.RefreshVBO();
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// Заполняем желтый (соседи)
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for (int i : lr) {
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auto neighbors = planetData.findNeighbors(i, currentLod);
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for (int n : neighbors) {
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if (usedYellow.count(n) == 0) {
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usedYellow.insert(n);
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planetRenderYellowStruct.data.PositionData.push_back(fullMesh.PositionData[n * 3]);
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planetRenderYellowStruct.data.PositionData.push_back(fullMesh.PositionData[n * 3 + 1]);
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planetRenderYellowStruct.data.PositionData.push_back(fullMesh.PositionData[n * 3 + 2]);
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planetRenderYellowStruct.data.TexCoordData.push_back(fullMesh.TexCoordData[n * 3]);
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planetRenderYellowStruct.data.TexCoordData.push_back(fullMesh.TexCoordData[n * 3 + 1]);
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planetRenderYellowStruct.data.TexCoordData.push_back(fullMesh.TexCoordData[n * 3 + 2]);
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}
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}
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}
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planetRenderYellowStruct.RefreshVBO();
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}
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void PlanetObject::draw(Renderer& renderer) {
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prepareDrawData();
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static const std::string defaultShaderName = "defaultColor";
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static const std::string defaultShaderName2 = "defaultColor2";
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static const std::string vPositionName = "vPosition";
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static const std::string vColorName = "vColor";
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static const std::string vNormalName = "vNormal";
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static const std::string vTexCoordName = "vTexCoord";
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//static const std::string vTexCoord3Name = "vTexCoord3";
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static const std::string textureUniformName = "Texture";
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renderer.shaderManager.PushShader(defaultShaderName);
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renderer.RenderUniform1i(textureUniformName, 0);
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renderer.EnableVertexAttribArray(vPositionName);
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renderer.EnableVertexAttribArray(vColorName);
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renderer.EnableVertexAttribArray(vNormalName);
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renderer.EnableVertexAttribArray(vTexCoordName);
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//renderer.EnableVertexAttribArray(vTexCoord3Name);
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float dist = planetData.distanceToPlanetSurface(Environment::shipPosition);
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auto zRange = planetData.calculateZRange(dist);
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const float currentZNear = zRange.first;
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const float currentZFar = zRange.second;
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// 2. Применяем динамическую матрицу проекции
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renderer.PushPerspectiveProjectionMatrix(1.0 / 1.5,
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static_cast<float>(Environment::width) / static_cast<float>(Environment::height),
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currentZNear, currentZFar);
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renderer.PushMatrix();
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renderer.LoadIdentity();
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renderer.TranslateMatrix({ 0,0, -1.0f * Environment::zoom });
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renderer.RotateMatrix(Environment::inverseShipMatrix);
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renderer.TranslateMatrix(-Environment::shipPosition);
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const Matrix4f viewMatrix = renderer.GetCurrentModelViewMatrix();
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Vector3f lightDir_World = Vector3f(1.0f, 0.0f, -1.0f).normalized();
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// В OpenGL/шейдерах удобнее работать с вектором, указывающим ОТ источника к поверхности.
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Vector3f lightDirection_World = -lightDir_World; // Вектор, направленный от источника
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Vector3f lightDirection_View;
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lightDirection_View.v[0] = viewMatrix.m[0] * lightDirection_World.v[0] + viewMatrix.m[4] * lightDirection_World.v[1] + viewMatrix.m[8] * lightDirection_World.v[2];
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lightDirection_View.v[1] = viewMatrix.m[1] * lightDirection_World.v[0] + viewMatrix.m[5] * lightDirection_World.v[1] + viewMatrix.m[9] * lightDirection_World.v[2];
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lightDirection_View.v[2] = viewMatrix.m[2] * lightDirection_World.v[0] + viewMatrix.m[6] * lightDirection_World.v[1] + viewMatrix.m[10] * lightDirection_World.v[2];
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lightDirection_View = lightDirection_View.normalized(); // Нормализуем на всякий случай
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// Установка uniform-переменной
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// Предполагается, что RenderUniform3fv определена в Renderer.h
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renderer.RenderUniform3fv("uLightDirection", &lightDirection_View.v[0]);
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renderer.RenderUniformMatrix4fv("ModelViewMatrix", false, &viewMatrix.m[0]);
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renderer.RenderUniform1f("uDistanceToPlanetSurface", dist);
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renderer.RenderUniform1f("uCurrentZFar", currentZFar);
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//glEnable(GL_BLEND);
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//glBlendFunc(GL_SRC_ALPHA, GL_ONE);// Аддитивное смешивание для эффекта свечения
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glBindTexture(GL_TEXTURE_2D, sandTexture->getTexID());
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renderer.DrawVertexRenderStruct(planetRenderStruct);
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//glDisable(GL_BLEND);
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CheckGlError();
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renderer.PopMatrix();
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renderer.PopProjectionMatrix();
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//renderer.DisableVertexAttribArray(vTexCoord3Name);
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renderer.DisableVertexAttribArray(vTexCoordName);
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renderer.DisableVertexAttribArray(vNormalName);
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renderer.DisableVertexAttribArray(vColorName);
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renderer.DisableVertexAttribArray(vPositionName);
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renderer.shaderManager.PopShader();
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CheckGlError();
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glClear(GL_DEPTH_BUFFER_BIT);
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//--------------------------
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if (planetRenderRedStruct.data.PositionData.size() > 0)
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{
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renderer.shaderManager.PushShader(defaultShaderName2);
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renderer.RenderUniform1i(textureUniformName, 0);
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renderer.EnableVertexAttribArray(vPositionName);
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renderer.EnableVertexAttribArray(vTexCoordName);
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// 2. Применяем динамическую матрицу проекции
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renderer.PushPerspectiveProjectionMatrix(1.0 / 1.5,
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static_cast<float>(Environment::width) / static_cast<float>(Environment::height),
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currentZNear, currentZFar);
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renderer.PushMatrix();
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renderer.LoadIdentity();
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renderer.TranslateMatrix({ 0,0, -1.0f * Environment::zoom });
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renderer.RotateMatrix(Environment::inverseShipMatrix);
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renderer.TranslateMatrix(-Environment::shipPosition);
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renderer.RenderUniform1f("uDistanceToPlanetSurface", dist);
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renderer.RenderUniform1f("uCurrentZFar", currentZFar);
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glBindTexture(GL_TEXTURE_2D, sandTexture->getTexID());
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Vector3f color1 = { 1.0, 0.0, 0.0 };
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Vector3f color2 = { 1.0, 1.0, 0.0 };
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renderer.RenderUniform3fv("uColor", &color1.v[0]);
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renderer.DrawVertexRenderStruct(planetRenderRedStruct);
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glBindTexture(GL_TEXTURE_2D, sandTexture->getTexID());
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renderer.RenderUniform3fv("uColor", &color2.v[0]);
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renderer.DrawVertexRenderStruct(planetRenderYellowStruct);
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//glDisable(GL_BLEND);
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CheckGlError();
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renderer.PopMatrix();
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renderer.PopProjectionMatrix();
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renderer.DisableVertexAttribArray(vTexCoordName);
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renderer.DisableVertexAttribArray(vPositionName);
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renderer.shaderManager.PopShader();
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CheckGlError();
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}
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drawAtmosphere(renderer);
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}
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void PlanetObject::drawAtmosphere(Renderer& renderer) {
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static const std::string defaultShaderName = "defaultAtmosphere";
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static const std::string vPositionName = "vPosition";
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static const std::string vNormalName = "vNormal";
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//glClear(GL_DEPTH_BUFFER_BIT);
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glDepthMask(GL_FALSE);
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renderer.shaderManager.PushShader(defaultShaderName);
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renderer.EnableVertexAttribArray(vPositionName);
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renderer.EnableVertexAttribArray(vNormalName);
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float dist = planetData.distanceToPlanetSurface(Environment::shipPosition);
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auto zRange = planetData.calculateZRange(dist);
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const float currentZNear = zRange.first;
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const float currentZFar = zRange.second;
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// 2. Применяем динамическую матрицу проекции
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renderer.PushPerspectiveProjectionMatrix(1.0 / 1.5,
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static_cast<float>(Environment::width) / static_cast<float>(Environment::height),
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currentZNear, currentZFar);
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renderer.PushMatrix();
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renderer.LoadIdentity();
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renderer.TranslateMatrix({ 0,0, -1.0f * Environment::zoom });
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renderer.RotateMatrix(Environment::inverseShipMatrix);
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renderer.TranslateMatrix(-Environment::shipPosition);
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const Matrix4f viewMatrix = renderer.GetCurrentModelViewMatrix();
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Vector3f color = { 0.0, 0.5, 1.0 };
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renderer.RenderUniform3fv("uColor", &color.v[0]);
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renderer.RenderUniformMatrix4fv("ModelViewMatrix", false, &viewMatrix.m[0]);
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renderer.RenderUniform1f("uDistanceToPlanetSurface", dist);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE);// Аддитивное смешивание для эффекта свечения
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renderer.DrawVertexRenderStruct(planetAtmosphereRenderStruct);
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glDisable(GL_BLEND);
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glDepthMask(GL_TRUE);
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renderer.PopMatrix();
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renderer.PopProjectionMatrix();
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renderer.DisableVertexAttribArray(vNormalName);
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renderer.DisableVertexAttribArray(vPositionName);
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renderer.shaderManager.PopShader();
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CheckGlError();
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}
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float PlanetObject::distanceToPlanetSurface(const Vector3f& viewerPosition)
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{
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return planetData.distanceToPlanetSurface(viewerPosition);
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}
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} // namespace ZL
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