First, you need to find a plan that parallel to projection plan in object space. gluUnproject() function gonna do the trick for you.
GLint gluUnProject(
GLdouble winX,
GLdouble winY,
GLdouble winZ,
const GLdouble * model,
const GLdouble * proj,
| # List all elements in a var | |
| FOREACH(item ${OPENGL_LIBRARIES}) | |
| MESSAGE(STATUS ${item}) | |
| ENDFOREACH(item) |
| /* Copyright (C) | |
| * 2016 - Tsing Gu | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License | |
| * as published by the Free Software Foundation; either version 2 | |
| * of the License, or (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| static vec findNearestPoint(vector<vec> line1, vector<vec>line2) | |
| { | |
| //vec p_0 = {line1[0](0), line1[0](1), line1[0](2)}; | |
| //vec q_0 = {line2[0](0), line2[0](1), line2[0](2)}; | |
| vec p_0 = line1[0]; | |
| vec q_0 = line2[0]; | |
| vec u = line1[1]; | |
| vec v = line2[1]; | |
| //全是伪代码 | |
| preMousePos; | |
| updateCamera() | |
| { | |
| if (leftBtnPressed) | |
| { | |
| curMousePos = glfwGetMousePos(); | |
| mouseDiff = curMousPose - preMousePos; | |
| applyRotationToCamera(mouseDiff); | |
| preMousePos = curMousePos; |
| #define GLFW_INCLUDE_VULKAN | |
| #include <GLFW/glfw3.h> | |
| #include <iostream> | |
| #include <vector> | |
| #include <stdexcept> | |
| #include <functional> | |
| #include <cstring> | |
| #include <set> |
| float plotX(vec2 st, float pct){ | |
| return smoothstep( pct-0.01, pct, st.y) - | |
| smoothstep( pct, pct+0.01, st.y); | |
| } | |
| float plotY(vec2 st, float pct){ | |
| return smoothstep( pct - 0.01, pct, st.x) - | |
| smoothstep(pct, pct + 0.01, st.x); | |
| } |
| # An example of how to use gcov/lcov with cmake. | |
| cmake_minimum_required (VERSION 2.8.11) | |
| project(testing) | |
| set (CMAKE_CXX_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage") | |
| set (CMAKE_C_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage") | |
| add_executable(exe test.cpp) |
| #include <GL/glew.h> | |
| #include <string> | |
| #include <fstream> | |
| #include <sstream> | |
| #include <iostream> | |
| #include <GLFW/glfw3.h> | |
| const size_t MAX_SHADER_LOG_LENGTH = 2048; | |
| std::string clangifyError(const char* err, const std::string& fileName) | |
| { |
| // The ocean FFT | |
| // Can be played on book of shader editor | |
| #ifdef GL_ES | |
| precision mediump float; | |
| #endif | |
| uniform vec2 u_resolution; | |
| uniform vec2 u_mouse; | |
| uniform float u_time; |