146 lines
4.8 KiB
C++
146 lines
4.8 KiB
C++
// SPDX-License-Identifier: LGPL-2.1-or-later
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/***************************************************************************
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* Copyright (c) 2024 Shai Seger <shaise at gmail> *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#ifndef __simdisplay_h__
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#define __simdisplay_h__
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#include "GlUtils.h"
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#include "Shader.h"
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#include "StockObject.h"
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#include "MillPathLine.h"
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#include <vector>
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#include <random>
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#include <algorithm>
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namespace MillSim
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{
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constexpr auto pi = std::numbers::pi_v<float>;
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struct Point3D
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{
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float x, y, z;
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};
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class SimDisplay
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{
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public:
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~SimDisplay();
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void InitGL();
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void CleanGL();
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void CleanFbos();
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void PrepareDisplay(const vec3& objCenter);
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void PrepareFrameBuffer();
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void StartDepthPass();
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void StartGeometryPass(const vec3& objColor, bool invertNormals);
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void StartCloserGeometryPass(const vec3& objColor);
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void RenderLightObject();
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void ScaleViewToStock(StockObject* obj);
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void RenderResult(bool recalculate, bool ssao);
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void RenderResultStandard();
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void RenderResultSSAO(bool recalculate);
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void SetupLinePathPass(int curSegment, bool isHidden);
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void TiltEye(float tiltStep);
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void RotateEye(float rotStep);
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void MoveEye(float x, float z);
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void MoveEyeCenter();
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void UpdateEyeFactor(float factor);
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void UpdateWindowScale(int width, int height);
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void UpdateProjection();
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float GetEyeFactor();
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public:
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bool updateDisplay = false;
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float maxFar = 100;
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bool displayInitiated = false;
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protected:
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void InitShaders();
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void CreateDisplayFbos();
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void CreateSsaoFbos();
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void CreateFboQuad();
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void CreateGBufTex(GLenum texUnit, GLint intFormat, GLenum format, GLenum type, GLuint& texid);
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void UniformHemisphere(vec3& randVec);
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void UniformCircle(vec3& randVec);
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protected:
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// shaders
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Shader shader3D, shaderInv3D, shaderFlat, shaderSimFbo;
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Shader shaderGeom, shaderSSAO, shaderSSAOLighting, shaderSSAOBlur;
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Shader shaderGeomCloser;
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Shader shaderLinePath;
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vec3 lightColor = {0.5f, 0.6f, 0.7f};
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vec3 lightPos = {20.0f, 20.0f, 10.0f};
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vec3 ambientCol = {0.2f, 0.2f, 0.25f};
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vec4 pathLineColor = {0.0f, 0.9f, 0.0f, 1.0};
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vec3 pathLineColorPassed = {0.9f, 0.3f, 0.3f};
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vec3 eye = {0, 100, 40};
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vec3 target = {0, 0, 0};
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vec3 upvec = {0, 0, 1};
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mat4x4 mMatLookAt;
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StockObject mlightObject;
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int mWidth = -1;
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int mHeight = -1;
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std::mt19937 generator;
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std::uniform_real_distribution<float> distr01;
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float mEyeDistance = 30;
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float mEyeRoration = 0;
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float mEyeInclination = pi / 6; // 30 degree
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float mEyeStep = pi / 36; // 5 degree
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float mMaxStockDim = 100;
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float mEyeDistFactor = 0.0f;
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float mEyeXZFactor = 0.01f;
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float mEyeXZScale = 0;
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float mEyeX = 0.0f;
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float mEyeZ = 0.0f;
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// base frame buffer
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unsigned int mFbo = 0;
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unsigned int mFboColTexture = 0;
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unsigned int mFboPosTexture = 0;
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unsigned int mFboNormTexture = 0;
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unsigned int mRboDepthStencil = 0;
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unsigned int mFboQuadVAO = 0, mFboQuadVBO = 0;
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// ssao frame buffers
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bool mSsaoValid = false;
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std::vector<Point3D> mSsaoKernel;
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unsigned int mSsaoFbo = 0;
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unsigned int mSsaoBlurFbo = 0;
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unsigned int mFboSsaoTexture = 0;
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unsigned int mFboSsaoBlurTexture = 0;
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unsigned int mFboRandTexture = 0;
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};
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} // namespace MillSim
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#endif // !__simdisplay_h__
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