breakout/settings.c

#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <stdbool.h>
#include <math.h>

#include "settings.h"

extern float XScale, YScale;

#define Slider_height 100
#define Scalar_width  20
#define Bar_width     400
#define round(x) ((int)((x) + .5))
#define distance(x1,y1,x2,y2)  ((int)(sqrt(pow(x2-x1,2)+pow(y2-y1,2))))

SDL_Texture * Settings_Texture;
SDL_Texture * Settings_Ball_Texture;
SDL_Texture * Settings_Skins_Texture;
SDL_Texture * Return_Button_Texture;

SDL_Rect Settings_rect;
SDL_Rect Settings_Ball_rect;
SDL_Rect Settings_Skins_rect;
SDL_Rect Return_Button_rect;

Slider BV;
Slider BS;
Slider BT;

Uint32 Mousestate;

bool Settings_IsInit = false;

void Settings_Initialize (SDL_Renderer* renderer,Scenery* scenery) {
  Initialize_Slider(400,300,Scalar_width,Bar_width,Slider_height,1,2,&BV,1.5);
  Initialize_Slider(400,500,Scalar_width,Bar_width,Slider_height,30,100,&BS,scenery->ball.TargetRect.w);
  Initialize_Slider(400,700,Scalar_width,Bar_width,Slider_height,0,8,&BT,scenery->ball.TextureIndex);
  Settings_Texture = IMG_LoadTexture(renderer, "assets/images/settings_title.png");
  Settings_rect = (SDL_Rect){.x = 647, .y = 50, .w=626, .h=200};

  Settings_Ball_rect = (SDL_Rect){.x = 1200, .y = 700, .w=90, .h=90};

  Settings_Skins_Texture = IMG_LoadTexture(renderer, "assets/images/skins_button.png");
  Settings_Skins_rect = (SDL_Rect){.x = 50, .y = 710, .w=315, .h=70};

  Return_Button_Texture = IMG_LoadTexture(renderer, "assets/images/return_button.png");
  Return_Button_rect = (SDL_Rect){.x = 200, .y = 200, .w=75, .h=75};

  Settings_IsInit = true;
}

void Settings_Draw(SDL_Renderer * renderer, Scenery * scenery) {
    double x;

    SDL_RenderCopy(renderer, Settings_Texture, NULL, &Settings_rect);
    SDL_RenderCopy(renderer, Return_Button_Texture, NULL, &Return_Button_rect);
    SDL_RenderCopy(renderer, Settings_Skins_Texture, NULL, &Settings_Skins_rect);
    BALL_DrawTexture(renderer, &Settings_Ball_rect, scenery->ball.TextureIndex);
    Settings_Return();

    Draw_Slider(renderer, &BV);
    Draw_Slider(renderer, &BS);
    Draw_Slider(renderer, &BT);
    mapping(&x, &BS);
    scenery->ball.TargetRect.w = x;
    scenery->ball.TargetRect.h = x;
    scenery->ball.Size = ((double)x / 2.0f);
    mapping(&x, &BT);
    x = round(x);
    scenery->ball.TextureIndex = x;
}

void Settings_Deinitialize(){
    if (Settings_IsInit) {
        SDL_DestroyTexture(Settings_Texture);
        SDL_DestroyTexture(Settings_Ball_Texture);
        Settings_IsInit = false;
    }
}

void Draw_Slider(SDL_Renderer * renderer, Slider * beta){
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
    SDL_RenderDrawRect(renderer, &beta->Bar_rect);
    int x, y;
    Mousestate = SDL_GetMouseState(&x, &y);
    x = round((float)x / XScale);
    y = round((float)y / YScale);
    if (y <= ((beta->Bar_rect.y) + (beta->Bar_rect.h)) && y >= (beta->Bar_rect.y) && x <= (beta->Bar_rect.w + beta->Bar_rect.x) && x >= (beta->Bar_rect.x) && (Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT))) {
        SDL_RenderFillRect(renderer, &beta->Scalar_rect);
        SDL_RenderDrawRect(renderer, &beta->Scalar_rect);
        if (x > (beta->Bar_rect.x + beta->Bar_rect.w - (beta->Scalar_rect.w) / 2)) {
            beta->Scalar_rect.x = (beta->Bar_rect.x + beta->Bar_rect.w - (beta->Scalar_rect.w));
            beta->Slider_value = (beta->Bar_rect.x + beta->Bar_rect.w - (beta->Scalar_rect.w) / 2);
        } else if (x < beta->Bar_rect.x + (beta->Scalar_rect.w) / 2) {
            beta->Scalar_rect.x = beta->Bar_rect.x;
            beta->Slider_value = beta->Bar_rect.x + (beta->Scalar_rect.w) / 2;
        } else {
            beta->Scalar_rect.x = x - (beta->Scalar_rect.w / 2);
            beta->Slider_value = x;
        }
    } else {
        SDL_RenderDrawRect(renderer, &beta->Scalar_rect);
    }
} /* Draw_Slider */

void mapping(double * x, Slider * beta){
    *x = ((beta->max - beta->min) / (beta->Bar_rect.w - (beta->Scalar_rect.w))) * (beta->Slider_value - beta->Bar_rect.x - beta->Scalar_rect.w / 2) + beta->min;
}

void Initialize_Slider(int x, int y, int sw, int bw, int h, double min, double max, Slider * beta,double defaultvalue){
    beta->Scalar_rect = (SDL_Rect) {.x = (defaultvalue-min)/(max-min)*(bw-sw/2)+x, .y = y, .w = sw, .h = h };
    beta->Bar_rect =  (SDL_Rect) {.x = x, .y = y, .w = bw, .h = h };
    beta->max = max;
    beta->min = min;
    beta->Slider_value = (defaultvalue-min)/(max-min)*(bw-sw/2)+x;
}

void Settings_Return(){
  int x,y;
  Mousestate=SDL_GetMouseState(&x,&y);
  x = round((float)x / XScale);
  y = round((float)y / YScale);
  if((distance(x,y,237,237)<=37)&&(Mousestate & SDL_BUTTON(SDL_BUTTON_LEFT)))
  GAME_ChangeState(MainMenu);
}