Video Games

EVR.Level.Prompt = function(level)
{
   this.level = level;
   this.initialize();
   this.append();
}
EVR.Level.Prompt.prototype = new EVR.Prompt;
EVR.Level.Prompt.prototype.initialize = function()
{
   var container = this.level.container;
   var text = LEVEL_START_PROMPT_TEXT;
   var color = LEVEL_PROMPT_COLOR;
   var size = LEVEL_PROMPT_SIZE;
   var background = LEVEL_PROMPT_BACKGROUND;
   var depth = LEVEL_PROMPT_DEPTH;
   var offset = [null, ROAD_OFFSET];
   EVR.Prompt.call(
      this, container, text, color, size, background, depth, null, offset);
}
EVR.Level.Prompt.prototype.set_finish_text = function()
{
   var level = this.level;
   var text = LEVEL_FINISHED_PROMPT_TEXT;
   if (level.id == LEVEL_LIMIT && level.is_clear())
   {
      text += ", " + LEVEL_VIEW_ENDING_PROMPT_TEXT;
   }
   else if (level.next_level_is_available())
   {
      text = LEVEL_CLEAR_PROMPT_TEXT;
   }
   this.set_text(text);
}
EVR.Level.Prompt.prototype.toggle = function()
{
   var attached = this.attached;
   attached && this.remove();
   !attached && this.append();
}
EVR.Level.Prompt.prototype.toString = function()
{
   return "[object EVR.Level.Prompt]";
}

EVR.include("level/cheers/marquee/Marquee.js");
EVR.Level.Cheers = function(level)
{
   EVR.Graphic.call(this, level.container, null, null, ALIGN_TOP);
   EVR.Animation.call(this, CHEERS_ANIMATION_RATE);
   this.level = level;
   this.cheer_texts = CHEERS_TEXTS;
   this.boost_bounds = [CHEERS_MIN_BOOST_LENGTH, CHEERS_MAX_BOOST_LENGTH];
   this.drag_threshold = CHEERS_DRAG_THRESHOLD;
   this.step = CHEERS_SCROLL_STEP;
   this.delay = CHEERS_SCROLL_DELAY;
   this.last_time = null;
   this.boost_length = null;
   this.drag_length = null;
   this.scrolling = false;
   this.setAttributes();
   this.append();
   this.background = new EVR.Level.Cheers.Marquee(
      this, CHEERS_SHADOW_COLOR_OFFSET, CHEERS_SHADOW_OFFSET,
      CHEERS_SHADOW_OPACITY);
   this.foreground = new EVR.Level.Cheers.Marquee(
      this, null, null, CHEERS_FOREGROUND_Z_INDEX, CHEERS_FOREGROUND_OPACITY);
}
EVR.Level.Cheers.prototype = new EVR.Graphic;
EVR.inherit(EVR.Level.Cheers, EVR.Animation);
EVR.Level.Cheers.prototype.setAttributes = function()
{
   this.set_proportions(CHEERS_MARQUEE_WIDTH, CHEERS_MARQUEE_HEIGHT);
   this.place(0, CHEERS_MARQUEE_OFFSET);
   this.css.overflow = "hidden";
}
EVR.Level.Cheers.prototype.scroll = function()
{
   var marquee_length = this.calculateScrollLength();
   var width = this.get_dimensions()[0];
   var cutoff = -marquee_length + width * (1 - CHEERS_SCROLL_PADDING);
   this.scrolling = true;
   this.play(null, this.delay, cutoff);
}
EVR.Level.Cheers.prototype.calculateScrollLength = function()
{
   var length = 0;
   var glyphs = this.foreground.glyphs;
   for (var ii = 0; ii < glyphs.length; ii++)
   {
      length += glyphs[ii].offsetWidth;
   }
   return length;
}
EVR.Level.Cheers.prototype.sequence = function(cutoff)
{
   var step = this.step;
   var foreground = this.foreground;
   var background = this.background;
   var foreground_x = foreground.get_coordinates()[0] - step;
   var background_x = background.get_coordinates()[0] - step;
   if (background_x < cutoff)
   {
      foreground_x = 0;
      background_x = 0;
      this.stop();
      this.play(null, this.delay, cutoff);
   }
   foreground.set_coordinates([foreground_x]);
   background.set_coordinates([background_x]);
}
EVR.Level.Cheers.prototype.update = function(sprinting, speed)
{
   if (this.level.practice)
   {
      return;
   }
   var time = this.level.clock.time.get();
   var interval = time - this.last_time;
   this.last_time = time;
   this.updateBoostTimer(sprinting, speed, interval);
   this.updateDragTimer(sprinting, speed, interval);
}
EVR.Level.Cheers.prototype.updateBoostTimer =
   function(sprinting, speed, interval)
{
   if (sprinting && speed == PATH_SPRINT_SPEED)
   {
      this.boost_length += interval;
      if (this.boost_length >= this.boost_bounds[1])
      {
	 this.addCheer();
	 this.boost_length = 0;
      }
   }
   else if (this.boost_length != 0)
   {
      this.addCheer();
      this.boost_length = 0;
   }
}
EVR.Level.Cheers.prototype.addCheer = function()
{
   var length = this.boost_length;
   var bounds = this.boost_bounds;
   if (length >= bounds[0])
   {
      this.drag_length = 0;
      if (length > bounds[1])
      {
	 this.boost_length = bounds[1];
      }
      var cheer = this.determineCheerText();
      this.foreground.addCheer(cheer);
      this.background.addCheer(cheer);
   }
}
EVR.Level.Cheers.prototype.determineCheerText = function()
{
   var bounds = this.boost_bounds;
   var range = bounds[1] - bounds[0];
   var offset = this.boost_length - bounds[0];
   var texts = this.cheer_texts;
   var index = Math.round((texts.length - 1) * (offset / range));
   return texts[index];
}
EVR.Level.Cheers.prototype.updateDragTimer = 
   function(sprinting, speed, interval)
{
   if (speed < PATH_INITIAL_SPEED || (speed < PATH_SPRINT_SPEED && sprinting))
   {
      this.drag_length += interval;
      if (this.drag_length >= this.drag_threshold)
      {
	 this.addJeer();
	 this.drag_length = 0;
      }
   }
}
EVR.Level.Cheers.prototype.addJeer = function()
{
   this.foreground.addJeer();
   this.background.addJeer();
}
EVR.Level.Cheers.prototype.draw = function()
{
   EVR.Graphic.prototype.draw.call(this);
   if (!!this.foreground)
   {
      this.foreground.draw();
      this.background.draw();
   }
   if (this.scrolling)
   {
      this.stop();
      this.scroll();
   }
}
EVR.Level.Cheers.prototype.remove = function()
{
   EVR.Graphic.prototype.remove.call(this);
   if (!!this.foreground)
   {
      this.foreground.remove();
      this.background.remove();
   }
   if (this.scrolling)
   {
      this.stop();
      this.scrolling = false;
   }
}
EVR.Level.Cheers.prototype.toString = function()
{
   return "[object EVR.Level.Cheers]";
}

3.137.168.223

September 13, 2013♦

from array import array
from time import sleep

import pygame
from pygame.mixer import Sound, get_init, pre_init

class Note(Sound):

    def __init__(self, frequency, volume=.1):
        self.frequency = frequency
        Sound.__init__(self, self.build_samples())
        self.set_volume(volume)

    def build_samples(self):
        period = int(round(get_init()[0] / self.frequency))
        samples = array("h", [0] * period)
        amplitude = 2 ** (abs(get_init()[1]) - 1) - 1
        for time in xrange(period):
            if time < period / 2:
                samples[time] = amplitude
            else:
                samples[time] = -amplitude
        return samples

if __name__ == "__main__":
    pre_init(44100, -16, 1, 1024)
    pygame.init()
    Note(440).play(-1)
    sleep(5)

This program generates and plays a 440 Hz tone for 5 seconds. It can be extended to generate the spectrum of notes with a frequency table or the frequency formula. Because the rewards in Send are idealized ocean waves, they can also be represented as tones. Each level has a tone in its goal and a tone based on where the player's disc lands. Both play at the end of a level, sounding harmonic for a close shot and discordant for a near miss. The game can dynamically create these tones using the program as a basis.

I'm also building an algorithmically generated song: Silk Routes (Scissored). Here is an example of how it sounds so far.

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