Archives
Game 6 Highlights
Due to time, we will cover the following:
- Platformer Movement (Video 1)
- Importing Sprite Sheets (Video 1)
- Enemy Movement & Paths (Video 2)
- Tile Sets (class and video 3)
- Big Room with a follow view (class and video 3)
Platformer Movement Script
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// Run This Function in END STEP event
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/*
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INSTRUCTIONS:
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This function requires passing in arguments playerSpeed (not hspeed or speed)
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and a gravity value.
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You should also make an optional argument maxFall with a value of 15
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In addition, you need to have two variables in the create event
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of your object:
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jumpSpeed = 0
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canJump = true
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optional: Jumping variable (needed in create if you are going to have
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a jumping animation (controlled in step).
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​
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*/
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​
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​
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​
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/*********************/
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/*Horizontal Movement*/
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/*********************/
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​
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var move = -keyboard_check(vk_left) + keyboard_check(vk_right);
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var collision = instance_place(x+playerSpeed, y+vspeed, all);
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​
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// You are moving right
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if (move == 1){
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if (collision < 0 or !object_get_solid(collision.object_index)){
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x += playerSpeed;
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}
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// Move to wall, if there is a SOLID wall to your right
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else{
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move_contact_solid(0, playerSpeed);
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}
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}
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​
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// You are moving left
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else if (move == -1){
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collision = instance_place(x-playerSpeed, y+vspeed, all)
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if ( collision < 0 or !object_get_solid(collision.object_index)){
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x -= playerSpeed;
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}
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// Move to wall, if there is a solid wall to your left
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else{
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move_contact_solid(180, playerSpeed);
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}
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}
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​
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​
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​
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/*******************/
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/*Vertical Movement*/
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/*******************/
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​
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jumping = false;
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collision = instance_place(x, y - jumpSpeed, all);
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// Check to see if you are in the air or are about to jump.
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if (place_empty(x, y + 1) or jumpSpeed > 0 or (collision > 0 and !object_get_solid(collision.object_index))){
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jumping = true;
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}
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​
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// if you are jumping...
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if (jumping){
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// Move up or down if there is no collision this frame.
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if (collision < 0 or !object_get_solid(collision.object_index)){
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y -= jumpSpeed;
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}
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// Check for a SOLID object below you
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else if (jumpSpeed < 0 and object_get_solid(collision.object_index)){
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move_contact_solid(270, jumpSpeed)
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jumpSpeed = 0
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}
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// Check for a SOLID object above you
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else if (jumpSpeed > 0 and object_get_solid(collision.object_index)){
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move_contact_solid(90, jumpSpeed)
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jumpSpeed = -0.1
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}
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jumpSpeed -= grav;
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if (jumpSpeed < -maxFall){
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jumpSpeed = -maxFall;
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}
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}
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​
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// If you are on SOLID ground, allow the player to jump again.
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if (!place_empty(x, y+1) and instance_place(x, y + 1, all) > 0 and object_get_solid( instance_place(x, y + 1, all).object_index)){
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canJump = true;
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}
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Animation Control
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var dir = -keyboard_check(vk_left) + keyboard_check(vk_right)
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​
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//put your sprite names here:
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var jump_right = sMario_jumpR
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var walk_right = sMario_right
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var jump_left = sMario_jumpL
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var walk_left = sMario_left
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​
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image_speed = 3
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if (dir == 1){
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if (jumping){
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sprite_index = jump_right;
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}
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else {
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sprite_index = walk_right;
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}
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}
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else if (dir == -1){
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if (jumping){
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sprite_index = jump_left;
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}
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else {
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sprite_index = walk_left;
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}
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}
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else {
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if (!jumping and sprite_index = jump_right){
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sprite_index = walk_right;
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} else if (!jumping and sprite_index = jump_left){
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sprite_index = walk_left;
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} else if (jumping and sprite_index = walk_right) {
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sprite_index = jump_right;
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} else if (jumping and sprite_index = walk_left) {
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sprite_index = jump_left;
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}
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image_speed = 0;
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image_index = 0;
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}
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​
Enemy Move
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var collision = instance_place(x+hspeed, y+vspeed, all);
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var collisionBelowRight = instance_place(x+hspeed+sprite_width, y+1, all)
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var collisionBelowLeft = instance_place(x+hspeed-sprite_width, y+1, all)
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​
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if (hspeed > 0){
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if (place_empty(x+hspeed+sprite_width, y+1) or
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(collision >-0 and object_get_solid(collision.object_index)) or
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(!place_empty(x+hspeed+sprite_width, y+1) and collisionBelowRight > 0 and object_get_solid(collisionBelowRight.object_index) == false )){
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hspeed = -hspeed;
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}
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}
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else if (hspeed < 0){
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if (place_empty(x+hspeed-sprite_width, y+1) or
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(collision >-0 and object_get_solid(collision.object_index)) or
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(!place_empty(x+hspeed-sprite_width, y+1) and collisionBelowLeft > 0 and object_get_solid(collisionBelowLeft.object_index) == false )){
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hspeed = -hspeed;
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}
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}
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​
Jump Attack
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if (y < other.y and jumpSpeed <= 0){
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instance_destroy(other)
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}
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else {
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instance_destroy(self)
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}
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​
Resources
Last modified 7mo ago
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