General Programming (new threads)

Script software

Sat, 23 Feb 2008 21:59:15 +0000

I want to make a script that can only be used in the pro edition in the advanced version,
could I use the same scripts from another script software ?

Errors

Sat, 24 Nov 2007 16:36:30 +0000

This Error message "variable name expected" keeps coming up, what does that mean?

Pixel Perfect Collision

Sat, 03 Nov 2007 18:53:04 +0000

Here's a challenge that's way beyond me at the moment :

Engineer pixel perfect collision without the use of any special game programming functions or libraries.

—hartnell

Why is looping important in game programming?

Sun, 14 Oct 2007 17:46:35 +0000

Question of the day #1.

Why is looping important in game programming?

50 words or less. :) —hartnell

Network programming

Fri, 28 Sep 2007 16:04:07 +0000

Has anyone done any multi-player game over network? If so, how should one approach such a task? I'm kinda getting stuck all the time just trying to make a basic pong network game.

Research - Memory

Mon, 24 Sep 2007 15:31:02 +0000

I was looking into the memory game (again) and did the following pseudo-code-thingy. Quite simple really, but i did run into some problems. Memory kinda relies on some scripting or timing of some kind. Let me explain.

When the player clicks on a card he has to wait while the card turns around (usually animated). Then finally when it has finished turning around, he can select the next card. When the next card has finished turning around, both cards should stay visible for a while then both either disappear (if equal) or both turn over again. So how can one do this? Any ideas?

Anyone is welcome to join in with ideas please :) Here are some graphics for a memory game.

Here's my code. Notice i just wrote //wait but that won't really work as the screen doesn't get updated until at the bottom of the main loop.

// Memory game // Initialize system // initialize graphics and mouse // Load images // Initialize game // Create and randomize cards // Main loop // If card clicked // Turn card // if two cards turned then // wait // if cards equal then // remove cards // else // hide cards again // if no cards left // end game // Draw cards // End loop

The Pong Page

Mon, 17 Sep 2007 13:20:29 +0000

For some reason I'm having trouble writing out the principles of pong on the new Pong page. Could someone give it a shot. Thanks.

—hartnell

Research - Pong

Sat, 15 Sep 2007 21:02:38 +0000

I'm now researching Pong. For those who want to participate, here is the Game Maker file (.gmk) that contains all the sprites and needed set-up with no code. The sprites are from the upcoming Touch of the Reaper 2 sprite sheet.

research-scratchpad/pong.gmk

—hartnell

We have the technology!

Fri, 07 Sep 2007 06:29:53 +0000

I was working on the lib and realized that I needed an engine to do most of the stuff I wanted to do. So, I created a standard game object in the lib and a way to create one. createGameObject() creates an game object in the gameObjects[] array, BUT returns a reference to the created object.

So, in this test, I create a game object, draw it's position with the reference newObj and then move it every loopin directly. Holy crap!

Below is the lib and the test. No external files needed.

The lib :

var vk_windowx = 0; var vk_escape = 1; var vk_1 = 2; var vk_2 = 3; var vk_3 = 4; var vk_4 = 5; var vk_5 = 6; var vk_6 = 7; var vk_7 = 8; var vk_8 = 9; var vk_9 = 10; var vk_0 = 11; var vk_minus = 12; var vk_equals = 13; var vk_backspace = 14; var vk_tab = 15; var vk_q = 16; var vk_w = 17; var vk_e = 18; var vk_r = 19; var vk_t = 20; var vk_y = 21; var vk_u = 22; var vk_i = 23; var vk_o = 24; var vk_p = 25; var vk_rbracket = 26; var vk_lbracket = 27; var vk_enter = 28; var vk_control = 29; var vk_a = 30; var vk_s = 31; var vk_d = 32; var vk_f = 33; var vk_g = 34; var vk_h = 35; var vk_j = 36; var vk_k = 37; var vk_l = 38; var vk_semicolon = 39; var vk_quote = 40; var vk_tilde = 41; var vk_lshift = 42; var vk_backslash = 43; var vk_z = 44; var vk_x = 45; var vk_c = 46; var vk_v = 47; var vk_b = 48; var vk_n = 49; var vk_m = 50; var vk_comma = 51; var vk_period = 52; var vk_slash = 53; var vk_rshift = 54; var vk_multiply = 55; var vk_alt = 56; var vk_space = 57; var vk_capslock = 58; var vk_f1 = 59; var vk_f2 = 60; var vk_f3 = 61; var vk_f4 = 62; var vk_f5 = 63; var vk_f6 = 64; var vk_f7 = 65; var vk_f8 = 66; var vk_f9 = 67; var vk_f10 = 68; var vk_numlock = 69; var vk_scrolllock = 70; var vk_home = 71; var vk_up = 72; var vk_pageup = 73; var vk_left = 75; var vk_right = 77; var vk_plus = 78; var vk_end = 79; var vk_down = 80; var vk_pagedown = 81; var vk_insert = 82; var vk_delete = 83; var vk_f11 = 87; var vk_f12 = 88; var vk_lwin = 125; var vk_rwin = 126; var vk_menu = 127; var c_aliceblue = Argb(0xFF,0xF0,0xF8,0xFF); var c_antiquewhite = Argb(0xFF,0xFA,0xEB,0xE7); var c_aqua = Argb(0xFF,0x00,0xFF,0xFF); var c_aquamarine = Argb(0xFF,0x7F,0xFF,0xD4); var c_azure = Argb(0xFF,0xF0,0xFF,0xFF); var c_black = Argb(0xFF,0x0,0x0,0x0); var c_brown = Argb(0xFF,0xA5,0x2A,0x2A); var c_blue = Argb(0xFF,0x0,0x0,0xFF); var c_cyan = Argb(0xFF,0x0,0xFF,0xFF); var c_gray = Argb(0xFF,0x80,0x80,0x80); var c_green = Argb(0xFF,0x0,0xFF,0x0); var c_lightblue = Argb(0xFF,0xAD,0xD8,0xE6); var c_orange = Argb(0xFF,0xFF,0xA5,0x00); var c_red = Argb(0xFF,0xFF,0x0,0x0); var c_yellow = Argb(0xFF,0xFF,0xFF,0x0); var pi = 3.141592654; var gameObjects = new Array(); function createGameObject() { var i; //check if array empty var arrLength = gameObjects.length; if (arrLength <= 0) { gameObjects[1] = new gameObject(); return gameObjects[1]; } //check for an empty spot for (i;i<=arrLength;i++) { if (gameObjects[i] == 0) { gameObjects[i] = new gameObject(); return gameObjects[i]; } } //lastly, just throw one at the end of array gameObjects[arrLength] = new gameObject(); return gameObjects[arrLength]; } function gameObject() { this.x = 0; // x-position of object this.y = 0; // y-position of object this.xStart = 0; // starting x location this.yStart = 0; // starting y location this.xPrevious = 0; // x-position last loopin this.yPrevious = 0; // y-position last loopin this.hSpeed = 0; // horizontal speed of object this.vSpeed = 0; // vertical speed of object this.direction = 0; // direction of motion this.spriteIndex = 0; // index of the sprite this.imageIndex = 0; // current frame this.imageSpeed = 0; // frame speed this.gravity = 0; // pull of gravity on object this.gravityDir = 0; // direction of pull of gravity this.friction = 0; // the force of friction per loopin this.id = 0; // the unique id of the object this.type = 0; // the type of object }

The test :

include("gdn_stdlib.bjs"); Graphics.Initialize(); Key.Initialize(); var gameOver = false; var newObj = createGameObject(); newObj.x = 100; newObj.y = 100; while (gameOver != true) { if (Key.Pressed(vk_escape) || Key.Pressed(vk_windowx)) { gameOver = true; } Graphics.Clear(); Graphics.SetPoint(newObj.x, newObj.y,c_azure); Graphics.Display(); Graphics.SetFPS(30); gameObjects[1].x++; } Graphics.Terminate(); Key.Initialize();

B2D 2D Lib

Fri, 07 Sep 2007 05:07:10 +0000

I present to you, the beginnings of the GDN B2D StdLib. It contains all the virtual keycodes and some colors that are normal defined in Javascript (but are not in B2D). (This looks perfect in B2D, I have no idea what wikidot's problem is in formatting it.)

var vk_windowx = 0; var vk_escape = 1; var vk_1 = 2; var vk_2 = 3; var vk_3 = 4; var vk_4 = 5; var vk_5 = 6; var vk_6 = 7; var vk_7 = 8; var vk_8 = 9; var vk_9 = 10; var vk_0 = 11; var vk_minus = 12; var vk_equals = 13; var vk_backspace = 14; var vk_tab = 15; var vk_q = 16; var vk_w = 17; var vk_e = 18; var vk_r = 19; var vk_t = 20; var vk_y = 21; var vk_u = 22; var vk_i = 23; var vk_o = 24; var vk_p = 25; var vk_rbracket = 26; var vk_lbracket = 27; var vk_enter = 28; var vk_control = 29; var vk_a = 30; var vk_s = 31; var vk_d = 32; var vk_f = 33; var vk_g = 34; var vk_h = 35; var vk_j = 36; var vk_k = 37; var vk_l = 38; var vk_semicolon = 39; var vk_quote = 40; var vk_tilde = 41; var vk_lshift = 42; var vk_backslash = 43; var vk_z = 44; var vk_x = 45; var vk_c = 46; var vk_v = 47; var vk_b = 48; var vk_n = 49; var vk_m = 50; var vk_comma = 51; var vk_period = 52; var vk_slash = 53; var vk_rshift = 54; var vk_multiply = 55; var vk_alt = 56; var vk_space = 57; var vk_capslock = 58; var vk_f1 = 59; var vk_f2 = 60; var vk_f3 = 61; var vk_f4 = 62; var vk_f5 = 63; var vk_f6 = 64; var vk_f7 = 65; var vk_f8 = 66; var vk_f9 = 67; var vk_f10 = 68; var vk_numlock = 69; var vk_scrolllock = 70; var vk_home = 71; var vk_up = 72; var vk_pageup = 73; var vk_left = 75; var vk_right = 77; var vk_plus = 78; var vk_end = 79; var vk_down = 80; var vk_pagedown = 81; var vk_insert = 82; var vk_delete = 83; var vk_f11 = 87; var vk_f12 = 88; var vk_lwin = 125; var vk_rwin = 126; var vk_menu = 127; var c_aliceblue = Argb(0xFF,0xF0,0xF8,0xFF); var c_antiquewhite = Argb(0xFF,0xFA,0xEB,0xE7); var c_aqua = Argb(0xFF,0x00,0xFF,0xFF); var c_aquamarine = Argb(0xFF,0x7F,0xFF,0xD4); var c_azure = Argb(0xFF,0xF0,0xFF,0xFF); var c_black = Argb(0xFF,0x0,0x0,0x0); var c_brown = Argb(0xFF,0xA5,0x2A,0x2A); var c_blue = Argb(0xFF,0x0,0x0,0xFF); var c_cyan = Argb(0xFF,0x0,0xFF,0xFF); var c_gray = Argb(0xFF,0x80,0x80,0x80); var c_green = Argb(0xFF,0x0,0xFF,0x0); var c_lightblue = Argb(0xFF,0xAD,0xD8,0xE6); var c_orange = Argb(0xFF,0xFF,0xA5,0x00); var c_red = Argb(0xFF,0xFF,0x0,0x0); var c_yellow = Argb(0xFF,0xFF,0xFF,0x0); function imageSetAngle(image, angle) { Graphics.SetAngle(image, angle * (3.141592654 / 180)); }

Expressing Sprite Animation Timing

Thu, 30 Aug 2007 15:49:45 +0000

Here's a thought, how about expressing sprite animation as a ratio? For example, take a sprite that is animated 4 frames per 2 loopins. Instead we could say it animates at 2/4 loopins. Diving 2 by 4 will also get you the decimal fraction you need to accomplish this. :)

What do you think?

—hartnell

Yar - Jackhammer Shields

Thu, 30 Aug 2007 15:26:57 +0000

To get the jackhammer effect when the Yar attempts to eat the shields, I only needed this code :

// code in GML, is executed on collision with shield piece x = x - bugShipSpeed * 3; y = yprevious;

yprevious is a built-in global variable that contains the y location of the game object in the previous loop.

This does exactly what it does in the game. Even forces the yar off the sides of the shield and forces it through it when approached from behind.

—hartnell