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whatever: Added 6 degreess of movement

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This commit is contained in:
Logen Kain 2016-11-12 19:30:15 -07:00
parent 4ec6c8652e
commit 4b7946d046
4 changed files with 69 additions and 29 deletions
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1
sdl/whatever/.gitignore vendored Normal file
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@ -0,0 +1 @@
whatever

1
sdl/whatever/references
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@ -2,3 +2,4 @@ http://www.xeekworx.com/sdl2guides/11-sdl2guides-02
https://wiki.libsdl.org/CategoryAPI
https://wiki.libsdl.org/MigrationGuide
http://www.willusher.io/sdl2%20tutorials/2013/08/17/lesson-2-dont-put-everything-in-main
http://lazyfoo.net/tutorials/SDL/18_key_states/index.php

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sdl/whatever/whatever
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86
sdl/whatever/whatever.c
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@ -1,7 +1,8 @@
#include "SDL2/SDL.h"
#include <stdbool.h>
//Write a function that moves an image based on which arrow keys are pressed.
//something like
//functionize, everything
//void move_image(direction, image);
@ -26,11 +27,12 @@ int main ( int argc, char *argv[] )
SDL_Surface* background_surface;
SDL_Texture* background_texture;
SDL_Rect top_image_dest = { 0 };
SDL_Event event = { 0 };
/*Event handler */
SDL_Event e;
int screen_width = 1024, screen_height = 768;
int top_image_width = 0, top_image_height = 0;
int movement_speed = 1;
/* create window of size 640x480 and set title bar*/
@ -81,13 +83,20 @@ int main ( int argc, char *argv[] )
top_image = SDL_CreateTextureFromSurface(renderer, temp);
SDL_FreeSurface(temp);
temp = NULL;
/* Get height and width of top_image */
SDL_QueryTexture(top_image, NULL, NULL, &top_image_width, &top_image_height);
if(top_image == NULL) {
printf("Failed to create texture from top_image: %s\n", SDL_GetError());
return 1;
}
/* Get height and width of top_image */
SDL_QueryTexture(top_image, NULL, NULL, &top_image_width, &top_image_height);
/* Prepare top_image for inital position */
top_image_dest.x = (screen_width / 2) - (top_image_width / 2);
top_image_dest.y = (screen_width / 2) - (top_image_height / 2);
top_image_dest.w = top_image_width;
top_image_dest.h = top_image_height;
}
int gameover = 0;
@ -96,27 +105,60 @@ int main ( int argc, char *argv[] )
while (!gameover)
{
/* look for an event */
if (SDL_PollEvent(&event)) {
// if (SDL_PollEvent(&event)) {
/* an event was found */
switch (event.type) {
// switch (event.type) {
/* close button clicked */
case SDL_QUIT:
gameover = 1;
break;
// case SDL_QUIT:
// gameover = 1;
// break;
/* handle the keyboard */
case SDL_KEYDOWN:
switch (event.key.keysym.sym) {
case SDLK_ESCAPE:
case SDLK_q:
// switch (event.key.keysym.sym) {
// case SDLK_ESCAPE:
// case SDLK_q:
// gameover = 1;
// break;
// case SDLK_w:
// printf("You just pressed 'w'\n");
// break;
// case SDLK_DOWN:
// top_image_dest.y += movement_speed;
// break; */
/*Try handling the key_events differently */
/*handle events on queue */
while ( SDL_PollEvent( &e ) != 0)
{
if (e.type == SDL_QUIT)
{
gameover = 1;
break;
case SDLK_w:
printf("You just pressed 'w'\n");
break;
}
break;
}
const Uint8* currentKeyStates = SDL_GetKeyboardState( NULL );
if (currentKeyStates[ SDL_SCANCODE_ESCAPE ] ||
currentKeyStates[ SDL_SCANCODE_Q ] )
{
gameover = 1;
}
if (currentKeyStates[ SDL_SCANCODE_LEFT ] )
{
top_image_dest.x -= movement_speed;
}
if (currentKeyStates[ SDL_SCANCODE_RIGHT ] )
{
top_image_dest.x += movement_speed;
}
if (currentKeyStates[ SDL_SCANCODE_UP ] )
{
top_image_dest.y -= movement_speed;
}
if (currentKeyStates[ SDL_SCANCODE_DOWN ] )
{
top_image_dest.y += movement_speed;
}
@ -124,10 +166,6 @@ int main ( int argc, char *argv[] )
SDL_RenderCopy(renderer, background_texture, NULL, NULL);
/* Render entire top_image to center of screen */
top_image_dest.x = (screen_width / 2) - (top_image_width / 2);
top_image_dest.y = (screen_width / 2) - (top_image_height / 2);
top_image_dest.w = top_image_width;
top_image_dest.h = top_image_height;
SDL_RenderCopy(renderer, top_image, NULL, &top_image_dest);
/* Render here */