Arrow Making Supplies
My homework is to move a sprite using the arrows keys up,left right and down.?
I asked my teacher and this was his response To make the sprite move, you need to supply variables as parameters, instead of fixed numbers. Then you add some 'if' statements which modify the variables, and hence move the sprite. This is my first class on coding and I don't know how to do that.
Heres my code so far I can press SPACEBAR to shoe the image how to move I haven't figured out. Any help will be appriciate.
void GameState::Draw()
{
if( keyboard[DIK_SPACE] )
{
// Draw a sprite somewhere random on screen
int x = 50;
int y = 100;
int size = 150;
aid_draw_sprite( spriteHandle, x, y, size, size );
}
}
Ok now this is coded to work with game maker so it may not work but its at least a good peice of code to look at, your trying to shoot for something like this anyways.
//check what direction is being pressed and move that way well applying image for that direction
if (keyboard_check(vk_right))
sprite_index = sp_player_right
direction = 0
speed = 3
image_index -= 0
if (keyboard_check(vk_left))
sprite_index = sp_player_left
direction = 180
speed = 3
image_index -= 0
if (keyboard_check(vk_up))
sprite_index = sp_player_up
direction = 90
speed = 3
image_index -= 0
if (keyboard_check(vk_down))
sprite_index = sp_player_down
direction = 270
speed = 3
image_index -= 0
//when not moving in that direction display subimage 0, standing still, and stop moving.
if (hspeed = 0)
if (sprite_index = sp_player_right)
image_index = 0
if (hspeed = 0)
if (sprite_index = sp_player_left)
image_index = 0
if (vspeed = 0)
if (sprite_index = sp_player_up)
image_index = 0
if (vspeed = 0)
if (sprite_index = sp_player_down)
image_index = 0
Now in game maker hspeed is horizontal, - is left and + is right, and vspeed is vertical, - is up and + is down. 0 is right, 180 is left, 90 is up, and 270 is down.
I haven't put any code in to stop the player once the arrow key is released. It should do it on its own but if not try changing keyboard_check to keyboard_check_pressed. Also know that I have four different sprites so my guy can walk up, down, left, and right.
Sorry this isn't exactly what you need but maybe it'll help
Making primitive/modern weapons and items
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