Data update
This commit is contained in:
Ingy döt Net
parent
61b93a2cd1
commit
5af6d93694
858 changed files with 20572 additions and 2082 deletions
128
Task/Plasma-effect/C++/plasma-effect-2.cpp
Normal file
128
Task/Plasma-effect/C++/plasma-effect-2.cpp
Normal file
|
|
@ -0,0 +1,128 @@
|
|||
// Standard C++ stuff
|
||||
#include <iostream>
|
||||
#include <array>
|
||||
#include <cmath>
|
||||
#include <numbers>
|
||||
|
||||
// SDL2 stuff
|
||||
#include "SDL2/SDL.h"
|
||||
|
||||
// Compile: g++ -std=c++20 -Wall -Wextra -pedantic -Ofast SDL2Plasma.cpp -o SDL2Plasma -lSDL2 -fopenmp
|
||||
|
||||
struct RGB {
|
||||
int Red, Green, Blue;
|
||||
};
|
||||
|
||||
RGB HSBToRGB(const double hue, const double saturation, const double brightness) {
|
||||
double Red = 0,
|
||||
Green = 0,
|
||||
Blue = 0;
|
||||
|
||||
if (hue == 1) {
|
||||
Red = brightness;
|
||||
} else {
|
||||
double Sector = hue * 360,
|
||||
Cosine = std::cos(Sector*std::numbers::pi/180),
|
||||
Sine = std::sin(Sector*std::numbers::pi/180);
|
||||
|
||||
Red = brightness * Cosine + saturation * Sine;
|
||||
Green = brightness * Cosine - saturation * Sine;
|
||||
Blue = brightness - saturation * Cosine;
|
||||
}
|
||||
|
||||
RGB Result;
|
||||
Result.Red = (int)(Red * 255);
|
||||
Result.Green = (int)(Green * 255);
|
||||
Result.Blue = (int)(Blue * 255);
|
||||
|
||||
return Result;
|
||||
}
|
||||
|
||||
template <int width_array_length, int height_array_length>
|
||||
void CalculatePlasma(std::array<std::array<double, width_array_length>, height_array_length> &array) {
|
||||
#pragma omp parallel for
|
||||
for (unsigned long y = 0; y < array.size(); y++)
|
||||
#pragma omp simd
|
||||
for (unsigned long x = 0; x < array.at(0).size(); x++) {
|
||||
// Calculate the hue
|
||||
double Hue = std::sin(x/16.0);
|
||||
Hue += std::sin(y/8.0);
|
||||
Hue += std::sin((x+y)/16.0);
|
||||
Hue += std::sin(std::sqrt(x*x+y*y)/8.0);
|
||||
Hue += 4;
|
||||
// Clamp the hue to the range of [0, 1]
|
||||
Hue /= 8;
|
||||
array[y][x] = Hue;
|
||||
}
|
||||
}
|
||||
|
||||
template <int width_array_length, int height_array_length>
|
||||
void DrawPlasma(SDL_Renderer *r, const std::array<std::array<double, width_array_length>, height_array_length> &array, const double &hue_shift) {
|
||||
for (unsigned long y = 0; y < array.size(); y++)
|
||||
for (unsigned long x = 0; x < array.at(0).size(); x++) {
|
||||
// Convert the HSB value to RGB value
|
||||
double Hue = hue_shift + std::fmod(array[y][x], 1);
|
||||
RGB CurrentColour = HSBToRGB(Hue, 1, 1);
|
||||
// Draw the actual plasma
|
||||
SDL_SetRenderDrawColor(r, CurrentColour.Red, CurrentColour.Green, CurrentColour.Blue, 0xff);
|
||||
SDL_RenderDrawPoint(r, x, y);
|
||||
}
|
||||
}
|
||||
|
||||
int main() {
|
||||
const unsigned DefaultWidth = 640,
|
||||
DefaultHeight = 640;
|
||||
std::array<std::array<double, DefaultWidth>, DefaultHeight> ScreenArray;
|
||||
|
||||
SDL_Window *Window = NULL; // Define window
|
||||
SDL_Renderer *Renderer = NULL; // Define renderer
|
||||
|
||||
// Init everything just for sure
|
||||
SDL_Init(SDL_INIT_EVERYTHING);
|
||||
|
||||
// Set window size to 640x640, always shown
|
||||
Window = SDL_CreateWindow("Plasma effect", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, DefaultWidth, DefaultHeight, SDL_WINDOW_SHOWN);
|
||||
Renderer = SDL_CreateRenderer(Window, -1, SDL_RENDERER_ACCELERATED);
|
||||
|
||||
// Set background colour to white
|
||||
SDL_SetRenderDrawColor(Renderer, 0xff, 0xff, 0xff, 0xff);
|
||||
SDL_RenderClear(Renderer);
|
||||
|
||||
// Create an event handler and a "quit" flag
|
||||
SDL_Event e;
|
||||
bool KillWindow = false;
|
||||
|
||||
CalculatePlasma<DefaultWidth, DefaultHeight>(ScreenArray);
|
||||
double HueShift = 0.0;
|
||||
|
||||
// The window runs until the "quit" flag is set to true
|
||||
while (!KillWindow) {
|
||||
while (SDL_PollEvent(&e) != 0) {
|
||||
// Go through the events in the queue
|
||||
switch (e.type) {
|
||||
// Event: user hits a key
|
||||
case SDL_QUIT: case SDL_KEYDOWN:
|
||||
// Destroy window
|
||||
KillWindow = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
// Render the plasma
|
||||
DrawPlasma<DefaultWidth, DefaultHeight>(Renderer, ScreenArray, HueShift);
|
||||
SDL_RenderPresent(Renderer);
|
||||
|
||||
if (HueShift < 1) {
|
||||
HueShift = std::fmod(HueShift + 0.0025, 3);
|
||||
} else {
|
||||
CalculatePlasma<DefaultWidth, DefaultHeight>(ScreenArray);
|
||||
HueShift = 0.0;
|
||||
}
|
||||
}
|
||||
|
||||
// Destroy renderer and window
|
||||
SDL_DestroyRenderer(Renderer);
|
||||
SDL_DestroyWindow(Window);
|
||||
SDL_Quit();
|
||||
|
||||
return 0;
|
||||
}
|
||||
145
Task/Plasma-effect/C++/plasma-effect-3.cpp
Normal file
145
Task/Plasma-effect/C++/plasma-effect-3.cpp
Normal file
|
|
@ -0,0 +1,145 @@
|
|||
// Standard C++ stuff
|
||||
#include <iostream>
|
||||
#include <array>
|
||||
#include <cmath>
|
||||
#include <numbers>
|
||||
|
||||
// SDL2 stuff
|
||||
#include "SDL2/SDL.h"
|
||||
|
||||
// Compile: g++ -std=c++20 -Wall -Wextra -pedantic -Ofast SDL2Plasma.cpp -o SDL2Plasma -lSDL2 -fopenmp
|
||||
|
||||
struct RGB {
|
||||
int Red, Green, Blue;
|
||||
};
|
||||
|
||||
RGB HSBToRGB(const float hue, const float saturation, const float brightness) {
|
||||
float Red = 0,
|
||||
Green = 0,
|
||||
Blue = 0;
|
||||
|
||||
if (hue == 1) {
|
||||
Red = brightness;
|
||||
} else {
|
||||
float Sector = hue * 360,
|
||||
Cosine = std::cos(Sector*std::numbers::pi/180),
|
||||
Sine = std::sin(Sector*std::numbers::pi/180);
|
||||
|
||||
Red = brightness * Cosine + saturation * Sine;
|
||||
Green = brightness * Cosine - saturation * Sine;
|
||||
Blue = brightness - saturation * Cosine;
|
||||
}
|
||||
|
||||
RGB Result;
|
||||
Result.Red = (int)(Red * 255);
|
||||
Result.Green = (int)(Green * 255);
|
||||
Result.Blue = (int)(Blue * 255);
|
||||
|
||||
return Result;
|
||||
}
|
||||
|
||||
template <int width_array_length, int height_array_length>
|
||||
void CalculatePlasma(std::array<std::array<float, width_array_length>, height_array_length> &array) {
|
||||
#pragma omp parallel for
|
||||
for (unsigned long y = 0; y < array.size(); y++)
|
||||
#pragma omp simd
|
||||
for (unsigned long x = 0; x < array.at(0).size(); x++) {
|
||||
// Calculate the hue
|
||||
float Hue = std::sin(x/16.0);
|
||||
Hue += std::sin(y/8.0);
|
||||
Hue += std::sin((x+y)/16.0);
|
||||
Hue += std::sin(std::sqrt(x*x+y*y)/8.0);
|
||||
Hue += 4;
|
||||
// Clamp the hue to the range of [0, 1]
|
||||
Hue /= 8;
|
||||
array[y][x] = Hue;
|
||||
}
|
||||
}
|
||||
|
||||
template <int width_array_length, int height_array_length>
|
||||
void DrawPlasma(SDL_Renderer *r, SDL_Texture *t, const std::array<std::array<float, width_array_length>, height_array_length> &array, const float &hue_shift) {
|
||||
unsigned char *Bytes = NULL;
|
||||
int Pitch = 0;
|
||||
float Hue;
|
||||
|
||||
// Lock the texture
|
||||
SDL_LockTexture(t, NULL, (void**)&Bytes, &Pitch);
|
||||
|
||||
for (unsigned long y = 0; y < array.size(); y++)
|
||||
for (unsigned long x = 0; x < array.at(0).size(); x++) {
|
||||
// Convert the HSB value to RGB value
|
||||
Hue = hue_shift + std::fmod(array[y][x], 1);
|
||||
RGB CurrentColour = HSBToRGB(Hue, 1, 1);
|
||||
|
||||
// Write colour data directly to texture
|
||||
Bytes[y*Pitch+x*4] = CurrentColour.Red; // Red
|
||||
Bytes[y*Pitch+x*4+1] = CurrentColour.Green; // Green
|
||||
Bytes[y*Pitch+x*4+2] = CurrentColour.Blue; // Blue
|
||||
Bytes[y*Pitch+x*4+3] = 0xff; // Alpha
|
||||
}
|
||||
|
||||
// Unlock the texture
|
||||
SDL_UnlockTexture(t);
|
||||
|
||||
// Feed the finished texture to the renderer
|
||||
SDL_RenderCopy(r, t, NULL, NULL);
|
||||
}
|
||||
|
||||
int main() {
|
||||
const unsigned DefaultWidth = 640,
|
||||
DefaultHeight = 640;
|
||||
std::array<std::array<float, DefaultWidth>, DefaultHeight> ScreenArray;
|
||||
|
||||
SDL_Window *Window = NULL; // Define window
|
||||
SDL_Renderer *Renderer = NULL; // Define renderer
|
||||
|
||||
// Init everything just for sure
|
||||
SDL_Init(SDL_INIT_EVERYTHING);
|
||||
|
||||
// Set window size to 640x640, always shown
|
||||
Window = SDL_CreateWindow("Plasma effect", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, DefaultWidth, DefaultHeight, SDL_WINDOW_SHOWN);
|
||||
Renderer = SDL_CreateRenderer(Window, -1, SDL_RENDERER_ACCELERATED);
|
||||
SDL_Texture *PlasmaTexture = SDL_CreateTexture(Renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, DefaultWidth, DefaultHeight);
|
||||
|
||||
// Set background colour to white
|
||||
SDL_SetRenderDrawColor(Renderer, 0xff, 0xff, 0xff, 0xff);
|
||||
SDL_RenderClear(Renderer);
|
||||
|
||||
// Create an event handler and a "quit" flag
|
||||
SDL_Event e;
|
||||
bool KillWindow = false;
|
||||
|
||||
CalculatePlasma<DefaultWidth, DefaultHeight>(ScreenArray);
|
||||
float HueShift = 0.0;
|
||||
|
||||
// The window runs until the "quit" flag is set to true
|
||||
while (!KillWindow) {
|
||||
while (SDL_PollEvent(&e) != 0) {
|
||||
// Go through the events in the queue
|
||||
switch (e.type) {
|
||||
// Event: user hits a key
|
||||
case SDL_QUIT: case SDL_KEYDOWN:
|
||||
// Destroy window
|
||||
KillWindow = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
// Render the plasma
|
||||
DrawPlasma<DefaultWidth, DefaultHeight>(Renderer, PlasmaTexture, ScreenArray, HueShift);
|
||||
SDL_RenderPresent(Renderer);
|
||||
|
||||
if (HueShift < 1) {
|
||||
HueShift = std::fmod(HueShift + 0.0025, 3);
|
||||
} else {
|
||||
CalculatePlasma<DefaultWidth, DefaultHeight>(ScreenArray);
|
||||
HueShift = 0.0;
|
||||
}
|
||||
}
|
||||
|
||||
// Destroy renderer and window
|
||||
SDL_DestroyRenderer(Renderer);
|
||||
SDL_DestroyWindow(Window);
|
||||
SDL_Quit();
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue