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main.cpp
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main.cpp
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#define VERSION "1.1"
#ifndef _DEBUG
#pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
#endif
#define IMGUI_DEFINE_MATH_OPERATORS
#define STB_IMAGE_WRITE_IMPLEMENTATION
#define NOMINMAX
#include <Windows.h>
#include "resource.h"
#include <imgui.h>
#include <imgui_impl_glfw.h>
#include <imgui_impl_opengl3.h>
#include <imgui_internal.h>
#include <imgui_theme.h>
#include <ImGradientHDR.h>
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <glm/glm.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <stb/stb_image_write.h>
#include <tinyfiledialogs/tinyfiledialogs.h>
#include <opencv.hpp>
#include <chromium/cubic_bezier.h>
#include <boost/multiprecision/cpp_complex.hpp>
#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <iomanip>
#include <ctime>
#include <string>
#include <filesystem>
#include <functional>
#include <algorithm>
#include <regex>
#define MV_COMPUTE 2
#define MV_POSTPROC 1
#define MV_RENDER 0
float vertices[] = {
-1.0f, -1.0f,
1.0f, -1.0f,
1.0f, 1.0f,
-1.0f, -1.0f,
1.0f, 1.0f,
-1.0f, 1.0f
};
void GLAPIENTRY glMessageCallback(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const void* userParam) {
if (type != GL_DEBUG_TYPE_ERROR) return;
fprintf(stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n", "** GL ERROR **", type, severity, message);
}
const char* vertexShaderSource = R"(
#version 430 core
layout(location = 0) in vec2 aPos;
void main() { gl_Position = vec4(aPos, 0.0, 1.0); }
)";
static gfx::CubicBezier fast_out_slow_in(0.4, 0.0, 0.2, 1.0);
static float bezier(float t) {
return fast_out_slow_in.Solve(t);
}
namespace ImGui {
ImFont* font;
// credit: https://github.com/zfedoran
bool BufferingBar(const char* label, float value, const ImVec2& size_arg, const ImU32& bg_col, const ImU32& fg_col) {
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return false;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const ImGuiID id = window->GetID(label);
ImVec2 pos = window->DC.CursorPos;
ImVec2 size = size_arg;
size.x -= style.FramePadding.x * 2;
const ImRect bb(pos, ImVec2(pos.x + size.x, pos.y + size.y));
ItemSize(bb, style.FramePadding.y);
if (!ItemAdd(bb, id))
return false;
window->DrawList->AddRectFilled(bb.Min, bb.Max, bg_col);
window->DrawList->AddRectFilled(bb.Min, ImVec2(bb.Min.x + value * size.x, bb.Max.y), fg_col);
}
// credit: https://github.com/hofstee
constexpr static auto lerp(float x0, float x1) {
return [=](float t) {
return (1 - t) * x0 + t * x1;
};
}
constexpr static float lerp(float x0, float x1, float t) {
return lerp(x0, x1)(t);
}
static auto interval(float T0, float T1, std::function<float(float)> tween = lerp(0.0, 1.0)) {
return [=](float t) {
return t < T0 ? 0.0f : t > T1 ? 1.0f : tween((t - T0) / (T1 - T0));
};
}
template <int T> float sawtooth(float t) {
return ImFmod(((float)T) * t, 1.0f);
}
bool Spinner(const char* label, float radius, int thickness, const ImU32& color) {
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems) return false;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const ImGuiID id = window->GetID(label);
ImVec2 pos = window->DC.CursorPos;
ImVec2 size((radius) * 2, (radius + style.FramePadding.y) * 2);
const ImRect bb(pos, ImVec2(pos.x + size.x, pos.y + size.y));
ItemSize(bb, style.FramePadding.y);
if (!ItemAdd(bb, id)) return false;
const ImVec2 center = ImVec2(pos.x + radius, pos.y + radius + thickness + style.FramePadding.y);
const float start_angle = -IM_PI / 2.0f; // Start at the top
const int num_detents = 5; // how many rotations we want before a repeat
const int skip_detents = 3; // how many steps we skip each rotation
const float period = 5.0f; // in seconds
const float t = ImFmod(g.Time, period) / period; // map period into [0, 1]
auto stroke_head_tween = [](float t) {
t = sawtooth<num_detents>(t);
return interval(0.0, 0.5, bezier)(t);
};
auto stroke_tail_tween = [](float t) {
t = sawtooth<num_detents>(t);
return interval(0.5, 1.0, bezier)(t);
};
auto step_tween = [=](float t) {
return floor(lerp(0.0, (float)num_detents, t));
};
auto rotation_tween = sawtooth<num_detents>;
const float head_value = stroke_head_tween(t);
const float tail_value = stroke_tail_tween(t);
const float step_value = step_tween(t);
const float rotation_value = rotation_tween(t);
const float min_arc = 30.0f / 360.0f * 2.0f * IM_PI;
const float max_arc = 270.0f / 360.0f * 2.0f * IM_PI;
const float step_offset = skip_detents * 2.0f * IM_PI / num_detents;
const float rotation_compensation = ImFmod(4.0 * IM_PI - step_offset - max_arc, 2 * IM_PI);
const float a_min = start_angle + tail_value * max_arc + rotation_value * rotation_compensation - step_value * step_offset;
const float a_max = a_min + (head_value - tail_value) * max_arc + min_arc;
window->DrawList->PathClear();
int num_segments = 24;
for (int i = 0; i < num_segments; i++) {
const float a = a_min + ((float)i / (float)num_segments) * (a_max - a_min);
window->DrawList->PathLineTo(ImVec2(center.x + ImCos(a) * radius,
center.y + ImSin(a) * radius));
}
window->DrawList->PathStroke(color, false, thickness);
return true;
}
// from imgui demo app
static void HelpMarker(const char* desc) {
ImGui::TextDisabled("(?)");
if (ImGui::BeginItemTooltip()) {
ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
ImGui::TextUnformatted(desc);
ImGui::PopTextWrapPos();
ImGui::EndTooltip();
}
}
}
class Error : public std::exception {
char* msg;
public:
Error(const char* message) {
msg = const_cast<char*>(message);
this->display();
}
void display() const {
std::cout << msg;
}
};
using namespace glm;
constexpr double zoom_co = 0.85;
constexpr double doubleClick_interval = 0.2;
ivec2 monitorSize;
static void HelpMarker(const char* desc) { // code from imgui demo
ImGui::TextDisabled("[?]");
if (ImGui::BeginItemTooltip()) {
ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
ImGui::TextUnformatted(desc);
ImGui::PopTextWrapPos();
ImGui::EndTooltip();
}
}
struct Slider {
std::string name;
float value = 0.f;
float min = 0.f, max = 0.f;
float step = 1.f;
};
struct Fractal {
std::string name = "Mandelbrot";
std::string equation = "cpow(z, degree) + c";
std::string condition = "distance(z, c) > 10";
std::string initialz = "c";
float degree = 2.f;
bool continuous_compatible = true;
std::vector<Slider> sliders;
};
std::vector<Fractal> fractals = {
Fractal({.name = "Custom"}),
Fractal({.name = "Mandelbrot", .equation = "cpow(z, degree) + c", .condition = "xsq + ysq > 100", .initialz = "c", .degree = 2.f, .continuous_compatible = true}),
Fractal({.name = "Julia Set", .equation = "cpow(z, degree) + dvec2(Re, Im)", .condition = "xsq + ysq > 100", .initialz = "c", .degree = 2.f, .continuous_compatible = true,
.sliders = { Slider({.name = "Re", .value = 0.f}), Slider({.name = "Im", .value = 0.f})}}),
Fractal({.name = "Nova", .equation = "z - cdivide(cpow(z, degree) - dvec2(1, 0), degree * cpow(z, degree - 1)) + c", .condition = "distance(z, prevz) < 10e-5", .initialz = "dvec2(1, 0)", .degree = 3.f, .continuous_compatible = false}),
Fractal({.name = "Burning ship", .equation = "cpow(dvec2(abs(z.x), abs(z.y)), degree) + c", .condition = "xsq + ysq > 100", .initialz = "c", .degree = 2.f, .continuous_compatible = true}),
Fractal({.name = "Magnet 1", .equation = "cpow(cdivide(cpow(z, degree) + c - dvec2(1, 0), degree * z + c - dvec2(degree, 0)), degree)", .condition = "length(z) >= 100 || length(z - dvec2(1,0)) <= 1e-5", .initialz="dvec2(0)", .degree = 2.f, .continuous_compatible = false}),
Fractal({.name = "Magnet 2", .equation = "cpow(cdivide(cpow(z, degree + 1) + 3 * cmultiply(c - dvec2(1, 0), z) + cmultiply(c - dvec2(1, 0), c - dvec2(2, 0)), "
"3 * cpow(z, degree) + 3 * cmultiply(c - dvec2(2, 0), z) + cmultiply(c - dvec2(1, 0), c - dvec2(degree, 0)) + dvec2(1, 0)), degree)", .condition = "length(z) >= 100 || length(z - dvec2(1,0)) <= 1e-5", .initialz = "dvec2(0)", .degree = 2.f, .continuous_compatible = false}),
Fractal({.name = "Lambda", .equation = "cmultiply(c, cmultiply(z, cpow(dvec2(1, 0) - z, degree - 1)))", .condition = "xsq + ysq > 100", .initialz = "dvec2(0.5f, 0.f)", .degree = 2.f, .continuous_compatible=true}),
Fractal({.name = "Tricorn", .equation = "cpow(cconj(z), degree) + c", .condition = "distance(z, c) > 10", .initialz = "c", .degree = 2.f, .continuous_compatible = true}),
};
struct Config {
//boost::multiprecision::cpp_complex_100 offset{ -0.4, 0.0 };
dvec2 offset = { -0.4, 0.0 };
ivec2 screenSize = { 840, 590 };
double zoom = 5.0;
float spectrum_offset = 860.f;
float iter_multiplier = 12.f;
bool auto_adjust_iter = true;
int max_iters = 100;
float iter_co = 1.045f;
bool continuous_coloring = true;
bool normal_map_effect = false;
fvec3 set_color = { 0.f, 0.f, 0.f };
int ssaa = 2;
int transfer_function = 0;
// experimental
float degree = 2.f;
// normal mapping
float angle = 180.f;
float height = 1.5f;
};
struct ZoomSequenceConfig {
Config tcfg;
int fps = 30;
int duration = 30;
int direction = 0;
char path[256]{};
bool ease_inout = true;
};
class MV2 {
GLFWwindow* window = nullptr;
ImFont* font_title = nullptr;
std::vector<vec4> paletteData = {
{0.0000f, 0.0274f, 0.3921f, 0.0000f},
{0.1254f, 0.4196f, 0.7960f, 0.1600f},
{0.9294f, 1.0000f, 1.0000f, 0.4200f},
{1.0000f, 0.6666f, 0.0000f, 0.6425f},
{0.0000f, 0.0078f, 0.0000f, 0.8575f},
{0.0000f, 0.0274f, 0.3921f, 1.0000f}
};
int span = 1000;
const int max_colors = 8;
ivec2 screenPos = { 0, 0 };
bool fullscreen = false;
Config config;
int fractal = 1;
ZoomSequenceConfig zsc;
int julia_size = 215;
double julia_zoom = 3;
double fps_update_interval = 0.03;
bool juliaset = true;
bool orbit = true;
bool cmplxinfo = true;
dvec2 oldPos = { 0, 0 };
dvec2 lastPresses = { -doubleClick_interval, 0 };
bool dragging = false;
bool rightClickHold = false;
dvec2 tempOffset = config.offset;
double tempZoom = config.zoom;
dvec2 cmplxCoord;
int numIterations;
bool recording = false;
bool paused = false;
int progress = 0;
cv::VideoWriter writer;
GLuint shaderProgram = NULL;
GLuint vertexShader = NULL;
GLuint mandelbrotFrameBuffer = NULL;
GLuint postprocFrameBuffer = NULL;
GLuint finalFrameBuffer = NULL;
GLuint juliaFrameBuffer = NULL;
GLuint mandelbrotTexBuffer = NULL;
GLuint postprocTexBuffer = NULL;
GLuint finalTexBuffer = NULL;
GLuint juliaTexBuffer = NULL;
GLuint paletteBuffer = NULL;
GLuint orbitBuffer = NULL;
GLuint sliderBuffer = NULL;
GLuint kernelBuffer = NULL;
int32_t stateID = 10;
ImGradientHDRState state;
ImGradientHDRTemporaryState tempState;
int op = MV_COMPUTE;
public:
MV2() {
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
const GLFWvidmode* mode = glfwGetVideoMode(glfwGetPrimaryMonitor());
glfwWindowHint(GLFW_RED_BITS, mode->redBits);
glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits);
glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate);
monitorSize.x = mode->width;
monitorSize.y = mode->height;
window = glfwCreateWindow(config.screenSize.x, config.screenSize.y, "Mandelbrot Voyage II", NULL, NULL);
if (window == nullptr) {
std::cout << "Failed to create OpenGL window" << std::endl;
return;
}
glfwSetWindowUserPointer(window, this);
glfwSwapInterval(1);
glfwMakeContextCurrent(window);
glfwSetFramebufferSizeCallback(window, on_windowResize);
glfwSetCursorPosCallback(window, on_cursorMove);
glfwSetMouseButtonCallback(window, on_mouseButton);
glfwSetScrollCallback(window, on_mouseScroll);
glfwSetKeyCallback(window, on_keyPress);
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.Fonts->AddFontDefault();
font_title = io.Fonts->AddFontFromFileTTF("C:\\Windows\\Fonts\\consola.ttf", 11.f);
IM_ASSERT(font_title != NULL);
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
io.IniFilename = NULL;
io.LogFilename = NULL;
ImGui::StyleColorsDark();
ImGui::LoadTheme();
ImGui_ImplGlfw_InitForOpenGL(window, true);
ImGui_ImplOpenGL3_Init("#version 430");
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
std::cout << "Failed to create OpenGL window" << std::endl;
return;
}
glGenTextures(1, &mandelbrotTexBuffer);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, mandelbrotTexBuffer);
glUniform1i(glGetUniformLocation(shaderProgram, "mandelbrotTex"), 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, config.screenSize.x * config.ssaa,
config.screenSize.y * config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glGenTextures(1, &postprocTexBuffer);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, postprocTexBuffer);
glUniform1i(glGetUniformLocation(shaderProgram, "postprocTex"), 1);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, config.screenSize.x * config.ssaa,
config.screenSize.y * config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glGenTextures(1, &finalTexBuffer);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, finalTexBuffer);
glUniform1i(glGetUniformLocation(shaderProgram, "finalTex"), 2);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, 1920, 1080, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glGenTextures(1, &juliaTexBuffer);
glBindTexture(GL_TEXTURE_2D, juliaTexBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, julia_size * config.ssaa,
julia_size * config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glGenFramebuffers(1, &mandelbrotFrameBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, mandelbrotFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mandelbrotTexBuffer, 0);
glGenFramebuffers(1, &postprocFrameBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, postprocFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, postprocTexBuffer, 0);
glGenFramebuffers(1, &finalFrameBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, finalFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, finalTexBuffer, 0);
glGenFramebuffers(1, &juliaFrameBuffer);
glBindFramebuffer(GL_FRAMEBUFFER, juliaFrameBuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, juliaTexBuffer, 0);
vertexShader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
glCompileShader(vertexShader);
int success;
char infoLog[512];
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
std::cout << infoLog << std::endl;
return;
}
unsigned int fragmentShader;
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
char* fragmentSource = read_resource(IDR_RNDR);
char* modifiedSource = new char[strlen(fragmentSource) + 4096];
sprintf(modifiedSource, fragmentSource, fractals[fractal].equation.data(), 0, fractals[fractal].condition.data(), fractals[fractal].initialz.data(), fractals[fractal].condition.data(), fractals[fractal].initialz.data());
glShaderSource(fragmentShader, 1, &modifiedSource, NULL);
glCompileShader(fragmentShader);
glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
std::cout << infoLog << std::endl;
return;
}
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, fragmentShader);
glLinkProgram(shaderProgram);
glDeleteShader(fragmentShader);
delete[] modifiedSource;
unsigned int VBO, VAO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 2, GL_FLOAT, false, 2 * sizeof(float), nullptr);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, NULL);
glUseProgram(shaderProgram);
glGenBuffers(1, &orbitBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, orbitBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, orbitBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "orbit"), 0);
glUniform1i(glGetUniformLocation(shaderProgram, "numVertices"), 0);
glGenBuffers(1, &paletteBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, paletteBuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, max_colors * sizeof(fvec4), paletteData.data(), GL_DYNAMIC_COPY);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, paletteBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "spectrum"), 1);
glUniform1i(glGetUniformLocation(shaderProgram, "span"), span);
glGenBuffers(1, &sliderBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, sliderBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, sliderBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "variables"), 2);
glGenBuffers(1, &kernelBuffer);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, kernelBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, kernelBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "kernel"), 3);
upload_kernel(config.ssaa);
use_config(config, true, false);
on_windowResize(window, config.screenSize.x, config.screenSize.y);
for (const vec4& c : paletteData) {
state.AddColorMarker(c.w, { c.r, c.g, c.b }, 1.0f);
}
}
private:
static inline char* read_resource(int name) {
HMODULE handle = GetModuleHandleW(NULL);
HRSRC rc = FindResourceW(handle, MAKEINTRESOURCE(name), MAKEINTRESOURCE(TEXTFILE));
if (rc == NULL) return nullptr;
HGLOBAL rcData = LoadResource(handle, rc);
if (rcData == NULL) return nullptr;
DWORD size = SizeofResource(handle, rc);
char* res = new char[size + 1];
memcpy(res, static_cast<const char*>(LockResource(rcData)), size);
res[size] = '\0';
return res;
}
void use_config(Config config, bool variables = true, bool textures = true) {
if (variables) {
glUniform2i(glGetUniformLocation(shaderProgram, "screenSize"), config.screenSize.x, config.screenSize.y);
glUniform2d(glGetUniformLocation(shaderProgram, "offset"), config.offset.x, config.offset.y);
glUniform1f(glGetUniformLocation(shaderProgram, "iter_multiplier"), config.iter_multiplier);
glUniform1d(glGetUniformLocation(shaderProgram, "zoom"), config.zoom);
if (!config.auto_adjust_iter) {
glUniform1i(glGetUniformLocation(shaderProgram, "max_iters"), config.max_iters);
} else {
glUniform1i(glGetUniformLocation(shaderProgram, "max_iters"), max_iters(config.zoom, zoom_co, config.iter_co));
}
glUniform1f(glGetUniformLocation(shaderProgram, "spectrum_offset"), config.spectrum_offset);
glUniform1i(glGetUniformLocation(shaderProgram, "continuous_coloring"), config.continuous_coloring);
glUniform1i(glGetUniformLocation(shaderProgram, "normal_map_effect"), config.normal_map_effect);
glUniform3f(glGetUniformLocation(shaderProgram, "set_color"), config.set_color.x, config.set_color.y, config.set_color.z);
glUniform1d(glGetUniformLocation(shaderProgram, "julia_zoom"), julia_zoom);
glUniform1i(glGetUniformLocation(shaderProgram, "julia_maxiters"), max_iters(julia_zoom, zoom_co, config.iter_co, 3.0));
glUniform1i(glGetUniformLocation(shaderProgram, "blur"), (config.ssaa ? config.ssaa : 1));
glUniform1i(glGetUniformLocation(shaderProgram, "transfer_function"), config.transfer_function);
glUniform1f(glGetUniformLocation(shaderProgram, "degree"), config.degree);
glUniform1f(glGetUniformLocation(shaderProgram, "angle"), config.angle);
glUniform1f(glGetUniformLocation(shaderProgram, "height"), config.height);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "orbit"), 0);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "spectrum"), 1);
}
if (textures) {
glBindFramebuffer(GL_FRAMEBUFFER, mandelbrotFrameBuffer);
glBindTexture(GL_TEXTURE_2D, mandelbrotTexBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, config.screenSize.x * config.ssaa, config.screenSize.y * config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, postprocFrameBuffer);
glBindTexture(GL_TEXTURE_2D, postprocTexBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, config.screenSize.x * config.ssaa, config.screenSize.y * config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
}
}
void set_op(int p, bool override = false) {
if (p > op || override) op = p;
}
static dvec2 pixel_to_complex(dvec2 pixelCoord, ivec2 screenSize, double zoom, dvec2 offset) {
return ((dvec2(pixelCoord.x / screenSize.x, (screenSize.y - pixelCoord.y) / screenSize.y)) - dvec2(0.5, 0.5)) *
dvec2(zoom, (screenSize.y * zoom) / screenSize.x) + offset;
}
static dvec2 pixel_to_complex(MV2* app, dvec2 pixelCoord) {
ivec2 ss = (app->fullscreen ? monitorSize : app->config.screenSize);
return ((dvec2(pixelCoord.x / ss.x, pixelCoord.y / ss.y)) - dvec2(0.5, 0.5)) *
dvec2(app->config.zoom, (ss.y * app->config.zoom) / ss.x) + app->config.offset;
}
static dvec2 complex_to_pixel(dvec2 complexCoord, ivec2 screenSize, double zoom, dvec2 offset) {
dvec2 normalizedCoord = (complexCoord - offset);
normalizedCoord /= dvec2(zoom, (screenSize.y * zoom) / screenSize.x);
dvec2 pixelCoordNormalized = normalizedCoord + dvec2(0.5, 0.5);
return dvec2(pixelCoordNormalized.x * screenSize.x, screenSize.y - pixelCoordNormalized.y * screenSize.y);
}
static int max_iters(double zoom, double zoom_co, double iter_co, double initial_zoom = 5.0) {
return 100 * std::max(1.0, pow(iter_co, log2(zoom / initial_zoom) / log2(zoom_co)));
}
// https://stackoverflow.com/a/8204886/15514474
static std::vector<float> generate_kernel(int radius) {
auto gaussian = [](float x, float mu, float sigma) -> float {
const float a = (x - mu) / sigma;
return std::exp(-0.5 * a * a);
};
const float sigma = radius / 2.f;
int rowLength = 2 * radius + 1;
std::vector<float> kernel(rowLength * rowLength);
float sum = 0;
for (uint64_t row = 0; row < rowLength; row++) {
for (uint64_t col = 0; col < rowLength; col++) {
float x = gaussian(row, radius, sigma) * gaussian(col, radius, sigma);
kernel[row * rowLength + col] = x;
sum += x;
}
}
for (uint64_t row = 0; row < rowLength; row++) {
for (uint64_t col = 0; col < rowLength; col++) {
kernel[row * rowLength + col] /= sum;
}
}
return kernel;
}
void upload_kernel(int radius) {
std::vector<float> kernel = generate_kernel(radius);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, kernelBuffer);
glBufferData(GL_SHADER_STORAGE_BUFFER, kernel.size() * sizeof(float), kernel.data(), GL_STATIC_DRAW);
glUniform1i(glGetUniformLocation(shaderProgram, "radius"), radius);
}
static void on_windowResize(GLFWwindow* window, int width, int height) {
MV2* app = static_cast<MV2*>(glfwGetWindowUserPointer(window));
if (app->config.screenSize.x == width && app->config.screenSize.y == height && app->fullscreen) {
app->set_op(MV_RENDER);
return;
}
glViewport(0, 0, width, height);
if (!app->fullscreen) app->config.screenSize = { width, height };
if (app->shaderProgram)
glUniform2i(glGetUniformLocation(app->shaderProgram, "screenSize"), width, height);
app->set_op(MV_COMPUTE);
glBindFramebuffer(GL_FRAMEBUFFER, app->mandelbrotFrameBuffer);
glBindTexture(GL_TEXTURE_2D, app->mandelbrotTexBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width * app->config.ssaa, height * app->config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, app->postprocFrameBuffer);
glBindTexture(GL_TEXTURE_2D, app->postprocTexBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width * app->config.ssaa, height * app->config.ssaa, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
}
static void on_mouseButton(GLFWwindow* window, int button, int action, int mod) {
MV2* app = static_cast<MV2*>(glfwGetWindowUserPointer(window));
ivec2 ss = (app->fullscreen ? monitorSize : app->config.screenSize);
if (ImGui::GetIO().WantCaptureMouse) return;
switch (button) {
case GLFW_MOUSE_BUTTON_LEFT:
if (action == GLFW_PRESS) {
app->dragging = true;
app->lastPresses.x = app->lastPresses.y;
app->lastPresses.y = glfwGetTime();
glfwGetCursorPos(window, &app->oldPos.x, &app->oldPos.y);
}
else if (app->lastPresses.y - app->lastPresses.x < doubleClick_interval) {
auto switch_shader = [&]() {
GLuint shader = NULL;
GLint success = false;
char infoLog[512];
static char* fragmentSource = read_resource(IDR_RNDR);
app->compile_shader(shader, &success, infoLog, fragmentSource);
app->reload_shader(shader);
app->update_shader();
app->set_op(MV_COMPUTE, true);
};
if (app->rightClickHold && app->fractal == 1 && app->juliaset) {
app->fractal = 2;
double x, y;
glfwGetCursorPos(window, &x, &y);
dvec2 cmplx = app->pixel_to_complex(app, dvec2(x, y));
fractals[2].sliders[0].value = cmplx.x;
fractals[2].sliders[1].value = cmplx.y;
switch_shader();
app->tempOffset = app->config.offset;
app->tempZoom = app->config.zoom;
}
else if (app->rightClickHold && app->fractal == 2) {
app->fractal = 1;
app->config.offset = app->tempOffset;
app->config.zoom = app->tempZoom;
switch_shader();
}
else {
glfwGetCursorPos(window, &app->oldPos.x, &app->oldPos.y);
dvec2 pos = pixel_to_complex(app, app->oldPos);
dvec2 center = pixel_to_complex(app, static_cast<dvec2>(ss) / 2.0);
app->config.offset += pos - center;
glUniform2d(glGetUniformLocation(app->shaderProgram, "offset"), app->config.offset.x, app->config.offset.y);
}
app->dragging = false;
app->set_op(MV_COMPUTE);
}
else {
app->dragging = false;
}
break;
case GLFW_MOUSE_BUTTON_RIGHT:
switch (action) {
case GLFW_PRESS:
app->rightClickHold = true;
app->julia_zoom = 3.0;
glUniform1d(glGetUniformLocation(app->shaderProgram, "julia_zoom"), app->julia_zoom);
glUniform1i(glGetUniformLocation(app->shaderProgram, "julia_maxiters"),
max_iters(app->julia_zoom, zoom_co, app->config.iter_co, 3.0));
app->refresh_rightclick();
break;
case GLFW_RELEASE:
app->rightClickHold = false;
}
}
}
static void on_cursorMove(GLFWwindow* window, double x, double y) {
MV2* app = static_cast<MV2*>(glfwGetWindowUserPointer(window));
ivec2 ss = (app->fullscreen ? monitorSize : app->config.screenSize);
glUniform2d(glGetUniformLocation(app->shaderProgram, "mousePos"), x / ss.x, y / ss.y);
if (ImGui::GetIO().WantCaptureMouse)
return;
if (app->dragging) {
app->lastPresses = { -doubleClick_interval, 0 };
app->config.offset.x -= ((x - app->oldPos.x) * app->config.zoom) / ss.x;
app->config.offset.y -= ((y - app->oldPos.y) * ((app->config.zoom * ss.y) / ss.x)) / ss.y;
glUniform2d(glGetUniformLocation(app->shaderProgram, "offset"), app->config.offset.x, app->config.offset.y);
app->oldPos = { x, y };
app->set_op(MV_COMPUTE);
}
if (app->rightClickHold) {
app->refresh_rightclick();
}
}
static void on_mouseScroll(GLFWwindow* window, double x, double y) {
MV2* app = static_cast<MV2*>(glfwGetWindowUserPointer(window));
if (app->rightClickHold) {
app->julia_zoom *= pow(zoom_co, y * 1.5);
glUniform1d(glGetUniformLocation(app->shaderProgram, "julia_zoom"), app->julia_zoom);
glUniform1i(glGetUniformLocation(app->shaderProgram, "julia_maxiters"), max_iters(app->julia_zoom, zoom_co, app->config.iter_co, 3.0));
glBindFramebuffer(GL_FRAMEBUFFER, app->juliaFrameBuffer);
glViewport(0, 0, app->julia_size * app->config.ssaa, app->julia_size * app->config.ssaa);
glUniform2i(glGetUniformLocation(app->shaderProgram, "screenSize"), app->julia_size * app->config.ssaa, app->julia_size * app->config.ssaa);
glUniform1i(glGetUniformLocation(app->shaderProgram, "op"), 4);
if (app->juliaset) glDrawArrays(GL_TRIANGLES, 0, 6);
app->refresh_rightclick();
}
else if (!ImGui::GetIO().WantCaptureMouse) {
app->config.zoom *= pow(zoom_co, y * 1.5);
glUniform1d(glGetUniformLocation(app->shaderProgram, "zoom"), app->config.zoom);
if (app->config.auto_adjust_iter) {
app->config.max_iters = max_iters(app->config.zoom, zoom_co, app->config.iter_co);
glUniform1i(glGetUniformLocation(app->shaderProgram, "max_iters"), app->config.max_iters);
}
app->set_op(MV_COMPUTE);
}
}
static void on_keyPress(GLFWwindow* window, int key, int scancode, int action, int mods) {
MV2* app = static_cast<MV2*>(glfwGetWindowUserPointer(window));
if (action != GLFW_PRESS) return;
switch (key) {
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, true);
break;
case GLFW_KEY_F11:
if (glfwGetWindowMonitor(window) == nullptr) {
app->fullscreen = true;
GLFWmonitor* monitor = glfwGetPrimaryMonitor();
const GLFWvidmode* mode = glfwGetVideoMode(monitor);
glfwGetWindowPos(window, &app->screenPos.x, &app->screenPos.y);
glfwSetWindowMonitor(window, monitor, 0, 0, mode->width, mode->height, mode->refreshRate);
}
else {
app->fullscreen = false;
glfwSetWindowMonitor(window, nullptr, app->screenPos.x, app->screenPos.y, app->config.screenSize.x, app->config.screenSize.y, 0);
}
}
}
void refresh_rightclick() {
double x, y;
glfwGetCursorPos(window, &x, &y);
ivec2 ss = (fullscreen ? monitorSize : config.screenSize);
cmplxCoord = pixel_to_complex(this, { x, y });
if (cmplxinfo) {
float texel[4];
glBindFramebuffer(GL_FRAMEBUFFER, mandelbrotFrameBuffer);
glReadBuffer(GL_FRONT);
glReadPixels(config.ssaa * x, (ss.y - y) * config.ssaa, 1, 1, GL_RGBA, GL_FLOAT, texel);
numIterations = static_cast<int>(texel[1]);
}
if (juliaset) {
glViewport(0, 0, julia_size * config.ssaa, julia_size * config.ssaa);
glBindFramebuffer(GL_FRAMEBUFFER, juliaFrameBuffer);
glUniform1i(glGetUniformLocation(shaderProgram, "op"), 3);
glUniform2d(glGetUniformLocation(shaderProgram, "mouseCoord"), cmplxCoord.x, cmplxCoord.y);
glUniform2i(glGetUniformLocation(shaderProgram, "screenSize"), julia_size * config.ssaa, julia_size * config.ssaa);
glDrawArrays(GL_TRIANGLES, 0, 6);
}
if (orbit) {
glBindBuffer(GL_SHADER_STORAGE_BUFFER, orbitBuffer);
glUniform2d(glGetUniformLocation(shaderProgram, "mousePos"), x, ss.y - y);
glUniform1i(glGetUniformLocation(shaderProgram, "numVertices"), 400);
glBufferData(GL_SHADER_STORAGE_BUFFER, 400 * sizeof(vec2), nullptr, GL_DYNAMIC_COPY);
set_op(MV_POSTPROC);
}
}
void compile_shader(GLuint& shader, GLint* success, char* infoLog, char* fragmentSource) {
char* modifiedSource = new char[strlen(fragmentSource) + 4096];
if (shader) glDeleteShader(shader);
shader = glCreateShader(GL_FRAGMENT_SHADER);
auto replace_variables = [&](std::string& str) {
for (int i = 0; i < fractals[fractal].sliders.size(); i++) {
std::string pattern = "\\b";
pattern.append(fractals[fractal].sliders[i].name.c_str());
pattern.append("\\b");
str = std::regex_replace(str, std::regex(pattern), std::format("sliders[{}]", i));
}
};
std::string eq = fractals[fractal].equation.data(), cond = fractals[fractal].condition.data(), init = fractals[fractal].initialz.data();
replace_variables(eq);
replace_variables(cond);
replace_variables(init);
sprintf(modifiedSource, fragmentSource, eq.data(), 1, cond.data(), init.data(), cond.data(), init.data());
glShaderSource(shader, 1, &modifiedSource, NULL);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, success);
if (!*success) {
glGetShaderInfoLog(shader, 512, NULL, infoLog);
}
else infoLog[0] = '\0';
delete[] modifiedSource;
}
void reload_shader(GLuint shader) {
glDeleteProgram(shaderProgram);
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, shader);
glLinkProgram(shaderProgram);
glDeleteShader(vertexShader);
glDeleteShader(shader);
glUseProgram(shaderProgram);
config.normal_map_effect = false;
use_config(config, true, false);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, orbitBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, orbitBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "orbit"), 0);
glUniform1i(glGetUniformLocation(shaderProgram, "numVertices"), 0);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, paletteBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, paletteBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "spectrum"), 1);
glUniform1i(glGetUniformLocation(shaderProgram, "span"), span);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, sliderBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, sliderBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "variables"), 2);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, kernelBuffer);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 3, kernelBuffer);
glShaderStorageBlockBinding(shaderProgram, glGetProgramResourceIndex(shaderProgram, GL_SHADER_STORAGE_BLOCK, "kernel"), 3);
glUniform1i(glGetUniformLocation(shaderProgram, "radius"), config.ssaa);
}
void update_shader() const {
glUniform1f(glGetUniformLocation(shaderProgram, "degree"), config.degree);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, sliderBuffer);
std::vector<float> values(fractals[fractal].sliders.size());
for (int i = 0; i < values.size(); i++) {
values[i] = fractals[fractal].sliders[i].value;
}
glBufferData(GL_SHADER_STORAGE_BUFFER, values.size() * sizeof(float), values.data(), GL_DYNAMIC_DRAW);
}
public:
void mainloop() {
do {
glfwPollEvents();
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
ivec2 ss = (fullscreen ? monitorSize : config.screenSize);
ImGui::PushFont(font_title);
ImGui::SetNextWindowPos({ 10, 10 });
ImGui::SetNextWindowCollapsed(true, 1 << 1);
if (ImGui::Begin("Settings", nullptr,
ImGuiWindowFlags_NoScrollbar |
ImGuiWindowFlags_NoScrollWithMouse |
ImGuiWindowFlags_AlwaysAutoResize |
ImGuiWindowFlags_NoMove
)) {
if (ImGui::BeginPopupModal("Zoom sequence creator", nullptr, ImGuiWindowFlags_AlwaysAutoResize)) {
if (recording) ImGui::BeginDisabled();
if (ImGui::Button("Browse...")) {
char const* lFilterPatterns[1] = { "*.avi" };
auto t = std::time(nullptr);
auto tm = *std::localtime(&t);
std::ostringstream oss;
oss << std::put_time(&tm, "MV2 %d-%m-%Y %H-%M-%S");
char const* buf = tinyfd_saveFileDialog("Save sequence", oss.str().c_str(), 1, lFilterPatterns, "Video Files (*.avi)");
if (glfwGetWindowMonitor(window) != nullptr) glfwRestoreWindow(window);
glfwShowWindow(window);
if (buf) strcpy(zsc.path, buf);
}
ImGui::SameLine();
ImGui::PushItemWidth(330);
ImGui::InputTextWithHint("##output", "Output", zsc.path, 256, ImGuiInputTextFlags_None, nullptr, nullptr);
ImGui::PushItemWidth(80);
ImGui::InputInt("FPS", &zsc.fps, 1, 5);
ImGui::SameLine();
ImGui::InputInt("Duration", &zsc.duration, 5, 20);
ImGui::SameLine();
const std::vector<ivec2> commonres = {
{ 640, 480 },
{ 1280, 720 },
{ 1920, 1080 },
{ 2560, 1440 },
{ 3840, 2160 }
};
static int res = 2;
zsc.tcfg.screenSize = commonres[res];
auto vec_to_str = [commonres](int i) {
return std::format("{}x{}", commonres.at(i).x, commonres.at(i).y);
};
std::string preview = vec_to_str(res);
if (ImGui::BeginCombo("Resolution", preview.c_str())) {
for (int i = 0; i < commonres.size(); i++) {
const bool is_selected = (res == i);
if (ImGui::Selectable(vec_to_str(i).c_str(), is_selected)) {
zsc.tcfg.screenSize = commonres.at(i);
glBindFramebuffer(GL_FRAMEBUFFER, finalFrameBuffer);
glBindTexture(GL_TEXTURE_2D, finalTexBuffer);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, zsc.tcfg.screenSize.x, zsc.tcfg.screenSize.y, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
res = i;
}
if (is_selected) ImGui::SetItemDefaultFocus();
}
ImGui::EndCombo();
}
const char* dirs[] = { "Zoom in", "Zoom out" };
preview = dirs[zsc.direction];
if (ImGui::BeginCombo("Direction", preview.c_str())) {
for (int i = 0; i < 2; i++) {
const bool is_selected = (zsc.direction == i);
if (ImGui::Selectable(dirs[i], is_selected)) {
zsc.direction = i;
}
if (is_selected) ImGui::SetItemDefaultFocus();
}
ImGui::EndCombo();
}
ImGui::SameLine();
const char* factors[] = { "None", "2X", "4X", "8X" };
int idx = static_cast<int>(log2(static_cast<float>(zsc.tcfg.ssaa)));
preview = factors[idx];
ImGui::PushItemWidth(44);
if (ImGui::BeginCombo("SSAA", preview.c_str())) {
for (int i = 0; i < 4; i++) {
const bool is_selected = (idx == i);
if (ImGui::Selectable(factors[i], is_selected)) {
zsc.tcfg.ssaa = pow(2, i);
}
if (is_selected) ImGui::SetItemDefaultFocus();
}