diff options
Diffstat (limited to 'SDLCartesian.cpp')
| -rw-r--r-- | SDLCartesian.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/SDLCartesian.cpp b/SDLCartesian.cpp new file mode 100644 index 000000000000..d6f45da295da --- /dev/null +++ b/SDLCartesian.cpp @@ -0,0 +1,163 @@ +#include "./SDLCartesian.h" + +SDL_Cartesian::SDL_Cartesian(int _width, int _height, std::vector<std::string> _functions) : + width(_width), + height(_height), + functions(_functions), + xOffset(0), + yOffset(0), + scrollSpeed(2), + running(true) +{ + SDL_Init(SDL_INIT_VIDEO); + window = SDL_CreateWindow("Savant Cartesian", SDL_WINDOWPOS_UNDEFINED,SDL_WINDOWPOS_UNDEFINED,width,height,SDL_WINDOW_SHOWN); + renderer = SDL_CreateRenderer(window, -1, 0); + texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STATIC,width,height); + pixels = new Uint32[width * height]; + for(int c = 0; c < functions.size(); c++) + { + rpn.push_back(Math::infixToRPN(functions[c])); + } + SDL_SetRenderDrawColor(renderer,0xff,0xff,0,0xff); + xScale = width/10.0f; + yScale = xScale; +} + +SDL_Cartesian::SDL_Cartesian(int _width, int _height, std::string _infix) : + width(_width), + height(_height), + xOffset(0), + yOffset(0), + scrollSpeed(2), + running(true) +{ + functions.push_back(_infix); + SDL_Init(SDL_INIT_VIDEO); + window = SDL_CreateWindow("Savant Cartesian", SDL_WINDOWPOS_UNDEFINED,SDL_WINDOWPOS_UNDEFINED,width,height,SDL_WINDOW_SHOWN); + renderer = SDL_CreateRenderer(window, -1, 0); + texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STATIC,width,height); + pixels = new Uint32[width * height]; + for(int c = 0; c < functions.size(); c++) + { + rpn.push_back(Math::infixToRPN(functions[c])); + } + SDL_SetRenderDrawColor(renderer,0xff,0xff,0,0xff); + xScale = width/10.0f; + yScale = xScale; +} + +void SDL_Cartesian::update() +{ + keys = SDL_GetKeyboardState(NULL); + if(keys[SDL_SCANCODE_MINUS]) + { + yScale = xScale -= (2.0f/10.0f) * (float)scrollSpeed * (float)functions.size(); + if(xScale < 2) xScale = yScale = 2; + } + if(keys[SDL_SCANCODE_EQUALS]) + { + yScale = xScale += (2.0f/10.0f) * (float)scrollSpeed * (float)functions.size(); + if(xScale > width/2) xScale = yScale = width/2; + } + if(keys[SDL_SCANCODE_LEFT]) + { + xOffset -= scrollSpeed * functions.size(); + } + if(keys[SDL_SCANCODE_RIGHT]) + { + xOffset += scrollSpeed * functions.size(); + } + if(keys[SDL_SCANCODE_UP]) + { + yOffset -= scrollSpeed * functions.size(); + } + if(keys[SDL_SCANCODE_DOWN]) + { + yOffset += scrollSpeed * functions.size(); + } + if(keys[SDL_SCANCODE_HOME]) + { + xOffset = yOffset = 0; + xScale = yScale = width/10.0f; + } + if(keys[SDL_SCANCODE_ESCAPE]) + { + running = false; + } + + for(int c = 0; c < width * height; c++) pixels[c] = 0xff000000; //Clear Screen + for(int c = 0; c < width; c++) + { + int coordinate = (int)(c + (-yOffset + height/2) * width); + if(coordinate >= 0 && coordinate < width * height && Math::absolute(yOffset) < height/2) + pixels[coordinate] = 0xff444444; //Draw X axis + } + for(int c = 0; c < height; c++) + { + int coordinate = (int)(width/2 - xOffset + (c)*width); + if(coordinate >= 0 && coordinate < width * height && Math::absolute(xOffset) < width/2) + pixels[coordinate] = 0xff444444; //Draw Y axis + } + SDL_UpdateTexture(texture,NULL,pixels,width * sizeof(Uint32)); +} + +void SDL_Cartesian::render() +{ + + double x; + double y; + last = {(double)xOffset,-Math::evaluateRPN(rpn[0],(-width/2) / xScale,false)*yScale + (double)height/2 - (double)yOffset}; + for(int c = 0; c < rpn.size(); c++) + { + switch(c) + { + case 0: + SDL_SetRenderDrawColor(renderer,0xFF,0xFF,0,0xFF); + break; + case 1: + SDL_SetRenderDrawColor(renderer,0xFF,0x22,0x22,0xFF); + break; + case 2: + SDL_SetRenderDrawColor(renderer,0x44,0x44,0xFF,0xFF); + break; + case 3: + SDL_SetRenderDrawColor(renderer,0xFF,0x66,0x00,0xFF); + break; + } + for(int i = 0 + xOffset; i < width + xOffset; i++) + { + //y = Math::evaluateRPN(rpn,(i - width)*xScale/width,false); + y = -Math::evaluateRPN(rpn[c],(i-width/2),false); + int coordinate = (int)(i + (y + height/2)*width); + next = {(double)(i - xOffset),-Math::evaluateRPN(rpn[c],(i - width/2)/xScale, false) * yScale + (double)(height/2 - yOffset)}; + if(i != xOffset)SDL_RenderDrawLine(renderer,last.x,last.y,next.x,next.y); + last = next; + //if(coordinate >= 0 && coordinate < width * height) pixels[coordinate] = 0xffffff00; + } + } +} + +void SDL_Cartesian::run() +{ + while(running) + { + SDL_PollEvent(&mainEvent); + if(mainEvent.type == SDL_QUIT) running = false; + SDL_RenderClear(renderer); + update(); + SDL_RenderCopy(renderer,texture,NULL,NULL); + render(); + SDL_RenderPresent(renderer); + SDL_Delay(10); + } +} + +SDL_Cartesian::~SDL_Cartesian() +{ +// rpn = std::string(); //TODO May cause errors + delete[] pixels; + SDL_DestroyTexture(texture); + SDL_DestroyRenderer(renderer); + SDL_DestroyWindow(window); + SDL_Quit(); +} |