From e0ef71674c9557e70909f8ca3a92c991ba5d37f5 Mon Sep 17 00:00:00 2001
From: 0xdeadbeer <64986162+0xdeadbeer@users.noreply.github.com>
Date: Sun, 12 Nov 2023 15:17:09 +0100
Subject: [PATCH] 01: Add simple animation and movement

---
 .gitignore                        |   2 +
 01-introduction/Makefile          |  28 ++++++
 01-introduction/assets/player.png | Bin 0 -> 1438 bytes
 01-introduction/src/main.c        | 161 ++++++++++++++++++++++++++++++
 01-introduction/src/main.o        | Bin 0 -> 6736 bytes
 01-introduction/src/structs.h     |  28 ++++++
 README                            |   4 +
 7 files changed, 223 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 01-introduction/Makefile
 create mode 100644 01-introduction/assets/player.png
 create mode 100644 01-introduction/src/main.c
 create mode 100644 01-introduction/src/main.o
 create mode 100644 01-introduction/src/structs.h
 create mode 100644 README

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3e76a09
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.ccls-cache/
+build/
diff --git a/01-introduction/Makefile b/01-introduction/Makefile
new file mode 100644
index 0000000..83c6441
--- /dev/null
+++ b/01-introduction/Makefile
@@ -0,0 +1,28 @@
+CC=gcc 
+CFLAGS=`pkg-config --cflags sdl2 SDL2_image`
+LDFLAGS=`pkg-config --libs sdl2 SDL2_image`
+TARGET=introduction
+SDIR=src
+ADIR=assets
+ODIR=build
+
+SRC=$(shell find $(SDIR) -type f -name *.c) 
+OBJ=$(SRC:.c=.o)
+
+all: $(TARGET)
+
+.PHONY: default
+$(TARGET): $(OBJ) 
+	mkdir -p build 
+	cp -rf $(ADIR) $(ODIR)/$(ADIR)
+	$(CC) -o $(ODIR)/$@ $^ $(LDFLAGS)
+
+%.o: %.c 
+	$(CC) $(CFLAGS) -o $@ -c $< 
+
+run: 
+	$(ODIR)/$(TARGET)
+
+.PHONY: clean 
+clean: 
+	rm -f $(ODIR)/$(TARGET) $(OBJ)
diff --git a/01-introduction/assets/player.png b/01-introduction/assets/player.png
new file mode 100644
index 0000000000000000000000000000000000000000..4cf0c430a8cdd6b2418cdb6c35eb528bf38bc103
GIT binary patch
literal 1438
zcmZ`(eK?Z~6n~fR$}K7LSefyMqO1=^O@_?3iKmA7EMhnAaFLYjmFTWi<I3tX7FR6{
zHD48a-H$SjwI0`YC03a`HLOj@KJPsD-+Rv==bYy}=XZX;=RD6jSC8ZU&DYzk2LQl4
zFu*qg0ATO*`Ce0Fy&tM=`bHmM*%AIeKpSuSM*uL23iS0pah^Uu*`K!E-+EA<x)@<J
zmxH1`nt5@>bxW#4gw0sial6{GMohW0g#y_ax$RPQqBq^C++qK&QfaxVk<WVg&BG0b
z%%F`y7M6!ft@FtlWKo_ZpCH=wpqxN2%w8Ps=xC|L8|s<=&nT#?JM<#c786h6T|7fH
z?fvqVi$gqRI4hv49HR5^0|G~&D2}EI+u56RYNHq}s}k4_b&vo@IP!jtNlTnM0N8Ay
z(xiqjqL17+TIF7B9WlwiW|A4LY0cnbNOyN}m#`(;%Zv4umJf4RF(gDN=X--~C@|#M
z18|@iPxg*U)mU9yipdmHxfe7Bgv@oec2e_OYWG*mWS3{Sy1bALirc~=v%i#vz{50C
zjpMD+pmP?A+hgOhq7`yH-cu>>aaDD-71{#s$7ZntMM?z}#YF$cJ_4(ME=5W)oA}K7
zKcRapdwadyCJKkC(iu_{CJI>>JjCs7V<w%RuxMHyUx3)TI^99g(Nt8f3)>x{OzkU&
z>I7{?8rW`yRIqeHYFI+baL;FniXFfLnu551J;P4((<+IFVKEGVNrE?K$x}vRjS8N4
zW~ZZr8qRW%)G;M8NM|twDU}N?VZO<46Ykh>5<;gVy=Ar;!&^Z)kmJ;QdBGt#4wqyH
z_UxAQ5Oo3-l>w$|cD{Z(6kVbo=~Sc!IJ?nsfBbDo8Fpjz;aF8mEr4P$sbAZ=!l*)U
z*&T&BG?fIat5w<d<bPGS#^vU&sZwDQTP%;~nzZhL0#=QKwB#rrwnPbkGy$@gWiCv6
zX3}Tu!chd{hO8!7)V#xBwdGq4GAoK+)Qlm8mbp)OY5bC5`i;cuqODZaX}09amroNv
z_%@ZQ$GXm~n>sobP-dJd8+Xq#;CGwGPQQhE=~vG2h22O;BK(oai(3G7>si0<7D5z_
zw&P-7Mf~{FJ(1mH6DpFN-uQ+ADk6oSwq?Es*a@SqX5&WmN$=hyJ#<Nrdd$+J=C#w@
zo2NdCznFWl_1ke%4vU6##XQ7-2?Vt-Th+!4)Z_Yc*cT4LwAP(lE7ovpY_HDh<WKfJ
zp5u*mq3s)+ZmMTG3D>cj&+@lEbTYOYQAFX8_J?<vszvYnRf9DL2JcT$eUl5f_*Dje
zaI3phcI1|5W?4T#Qm3A`K3zEIqrnhVRLhrWdxa<!G=dT)tT_o`%nbkYl3zy?IsEy%
zQ7?ikllxo)*(3hq9Qan^0NHWgQ^|>b-rx*WjLucp={74?QYlNas99`2fjk-Jb3;3n
zW8;87BSs5eelVN2)fXB0>Ch}AgsFJ{zP`G&m$WiXMRk%6&VOi*g}I9}s55GT6r^Z=
zRBNvO3{^V6OFwUMw5*FYXU$&KH(4FzV>Z<p=VjW9Gb)$VDB341m#E8^DA5NPk{RLG
zzDnrX3&(fxSHcJosQ=6(?GI$(izo~BFBOA(t3y)ohAukcFBNZMvcxj#jIw76jQ2<g
z#>Mlz!?ks%tNgSn#Qt@>4eckZ%r@tb7r0LPG`;caLV+IoBOW}hlUHEdtXC2Jh@WEm
z?3Wn@7BxwnLwq5+AffrvwOLYwSok|p6C=YGY8#%url?19l}@C2*ATCo=Ih=ui*OVu
zx<b$u9qbAl2!*%PMBvyx6j*uK4$KxTx>;bLCGD|7MHzkCIZ@gRVj<kWpW?qi8oyKr
XlYZw^C%J8&yw(wj!~3@RBo_Yz#$ncN

literal 0
HcmV?d00001

diff --git a/01-introduction/src/main.c b/01-introduction/src/main.c
new file mode 100644
index 0000000..59c3fc2
--- /dev/null
+++ b/01-introduction/src/main.c
@@ -0,0 +1,161 @@
+#include <stdio.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include "structs.h"
+
+const int SCREEN_WIDTH = 640; 
+const int SCREEN_HEIGHT = 480;
+const Uint32 WINDOW_FLAGS = SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL | SDL_WINDOW_BORDERLESS; 
+const Uint32 RENDERER_FLAGS = SDL_RENDERER_ACCELERATED;
+int GAME_RUNNING = 1;
+struct game game; 
+int movement_speed = 5;
+int animation_frames = 100;
+int frames = 0;
+
+void prepare_scene(void) {
+    SDL_SetRenderDrawColor(game.renderer, 96, 128, 255, 255);
+    SDL_RenderClear(game.renderer);
+}
+
+void key(SDL_KeyboardEvent *event) {
+    if (event->repeat != 0)
+        return;   
+
+    if (event->keysym.scancode == SDL_SCANCODE_W)
+        game.up = !game.up;
+    if (event->keysym.scancode == SDL_SCANCODE_S)
+        game.down = !game.down;
+    if (event->keysym.scancode == SDL_SCANCODE_A)
+        game.left = !game.left;
+    if (event->keysym.scancode == SDL_SCANCODE_D)
+        game.right = !game.right;
+}
+
+void handle_input(void) {
+    SDL_Event event; 
+
+    while (SDL_PollEvent(&event)) {
+        switch (event.type) {
+            case SDL_QUIT: 
+                GAME_RUNNING = 0; 
+                break;
+            case SDL_KEYDOWN: 
+            case SDL_KEYUP: 
+                key(&event.key); 
+                break;
+            default:
+                break;
+        }
+        if (event.type == SDL_QUIT) {
+            GAME_RUNNING = 0;
+        }
+    }
+}
+
+SDL_Texture *load_texture(const char *path) {
+    SDL_Texture *texture; 
+    
+    SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, "Loading %s", path);
+    
+    texture = IMG_LoadTexture(game.renderer, path);
+
+    return texture;
+}
+
+struct object *create_object(const char *texture_path, int x, int y, int scale, int resolution) {
+    struct object *object = (struct object *) calloc(1, sizeof(struct object));
+
+    if (object == NULL) {
+        fprintf(stderr, "Error: failed allocating memory for new object\n");
+        return NULL;
+    }
+
+    object->texture = load_texture(texture_path);
+
+    if (object->texture == NULL) {
+        fprintf(stderr, "Error: loading texture into new object\n");
+        return NULL;
+    }
+
+    object->x = x; 
+    object->y = y;
+    object->scale = scale;
+    object->resolution = resolution;
+
+    return object;
+}
+
+void draw_object(struct object *object) {
+    SDL_Rect src;
+    SDL_Rect dest;
+
+    src.x = object->state * object->resolution;
+    src.y = 0;
+
+    src.w = object->resolution;
+    src.h = object->resolution;
+
+    dest.x = object->x; 
+    dest.y = object->y; 
+    dest.w = object->resolution * object->scale;
+    dest.h = object->resolution * object->scale;
+
+    SDL_RenderCopy(game.renderer, object->texture, &src, &dest);
+}
+
+void present_scene(void) {
+    SDL_RenderPresent(game.renderer);
+}
+
+int main(int argc, char *argv[]) {
+    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
+        fprintf(stderr, "Error: could not initialize SDL\n%s\n", SDL_GetError());
+        return -1;
+    }
+
+    game.window = SDL_CreateWindow("01-introduction", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, WINDOW_FLAGS);
+
+    if (game.window == NULL) {
+        fprintf(stderr, "Error: could not create window\n%s\n", SDL_GetError());
+        return -1;
+    }
+
+    game.renderer = SDL_CreateRenderer(game.window, -1, RENDERER_FLAGS);    
+
+    if (game.renderer == NULL) {
+        fprintf(stderr, "Error: could not create renderer\n%s\n", SDL_GetError());
+        return -1;
+    }
+
+    struct object *player = create_object("assets/player.png", SCREEN_WIDTH/2, SCREEN_HEIGHT/2, 3, 48);
+
+    // game loop
+    while (GAME_RUNNING) {
+        frames++;
+        prepare_scene();
+        handle_input(); 
+
+        if (game.up)
+            player->y -= movement_speed; 
+        if (game.down)
+            player->y += movement_speed;
+        if (game.left) 
+            player->x -= movement_speed; 
+        if (game.right) 
+            player->x += movement_speed;
+
+        player->state = ((frames % animation_frames)/5) % 10;
+
+        draw_object(player);
+
+        present_scene();
+
+        SDL_Delay(16);
+    }
+
+    SDL_DestroyWindow(game.window);
+    SDL_Quit();
+
+    return 0; 
+}
diff --git a/01-introduction/src/main.o b/01-introduction/src/main.o
new file mode 100644
index 0000000000000000000000000000000000000000..e609267d62be63ec69a1d172e885ea921aab9c63
GIT binary patch
literal 6736
zcmbtYeQXrR6`wN>P{&}C5FiN+O9K>|aIv9CElS#R?ZxZLHpXDls*TRa-P#<SZ?AiM
zF;0s@>(XR(rJ_=l5UG{;qfMo%AF5hWheqaXlweSmn207+LaL?GhyYU6s8z3N1buI2
z-ukh4iK;wl=i~Q&^XARG`MP_??A%rpiwTmL_=1?N5h}#=ve|M%787EzSS0!^|8G|L
zE<{?!ZbJGBCMOR;GTsk~<)66%na~`n9)0q(Z0R4YT4l4^a3ZnjyOoB+-;qqST23^M
zRv#!WRfZ2&8lJB-oT&J+8{|v<vX9W$euREOY583Cuf@o@(d&tfRjysTUXH`8Hdn57
zmd(l&I6>aMGIQ5$6!U}_t;U8|UaLPN9mL^YYp{-(6&fv=q;{pcSrVrlu9SXq6o;0v
z9#K7dcgcx6t0rpnx?%YTuK?qU<xf~g)KvJB<IuY}g<Xzea?4zo`+)m4Ibr#xoa?|~
z6B_hOm;JsOzw1()Z(bZXz{DvGzp{fZMh{j+=`%t2CQd#E>T%=*PN)dW{;!pkhZOX_
zs^!<<u&lDMV2s?*r|)R!QEXN2yX^PWtI~|$)2K?9{GO$%bkXlwh^1gm2^iB<C}=>K
zD)+3ASz=+suP1$T`iyx2dWTgBs>DJVdQiHgO7*@uqe_jwd0CcZS3qAXO<*X%EOsAY
z*Rf)in`pL<bj?^t`lcxYcZ#oCi2+k@4~V*d@Ve!fW=<L4u8hjzir1vWGZ}QWNRGyT
z0}RZrgRz?+@3q&!ro`QQat5L{b_l91{@E6P+MhTn#LZRXn1o_!(N<H-3<CFmb$J0g
zItl&It{+E7Xlx(T_5mCOj>MmwxVkDfeZK0yE(aCVTgIB8>sN4N`0x9#-!?R}`d&S>
zS2I3ZiK(&5DU}Hw3f?jZXSLkZsDKSH+h!FOVT3*wrLVuWy{<wSwS5gxdtEJW0sqBI
z|Gwd$_ouA%w3U5paA07-nz(A5|6roJ%0Ith!b(qA*@}X%7%%}J)c8}N+c4=*Pt4TB
zrel>26aG2nH*NsfjcRAgfu3rF9&Q<O!{K*tK%|tzw{YdEI(u5)4Y(*W=p6_yCyWLz
zFpPMolgecCgT~q-YK1Ue*KxNR1F3Az&KRj&&Pk^{Bn;U@jyqxuIIfYmhYe@XK0EEz
z5kIHRc=iFW<l06y?>Tev(oQLtG4hTFjI5VU<+4xP#?H3Ry0yhR(bT*V+PO}ql=iYt
zp8GS~F74VW&o+j$`HV9xo86J;+WCy_+OA}#ibdNiK32%3Mr=1;$PWt9-rBm=Sl`~=
zx4~%M9N!dgHa0bF+T8THre<kY)Iw&!hjR!ln6p>~F_M_B!<0%{s`J>>y&`s?G4^2n
zf`vyxxe{>vP_|;yvbgbkHLZ*0mw*6O)IE+k$d550ea$gRK>gPd2l+lGf&SS*|1HEp
zc3=|dI|KcX5C@S*X`p{I(7&qG;t!Yy`V)cvlGe+o1?hK4we<f(t$zU*7U}2xutqVo
zGL+%G)rx=MBjh%jCs*%nFkImBn7c)RbGU@z6r=kzPIby3);P99Asmk)v{Nt9S^SF<
z$1_R^@jIcqBxtSH3NkPTOTbg&QQoidaKHN`UMtrc6oYo(fbu<T9^~2q>>2p*I0(xN
z0L+EI3^>}M_HvB@_H&KD138LZTaf=AzPaqY7J<JFINDF^jUd+`V1JF^zaN3uKzp?F
zJ8eg<Rpdf_E`OFs;15OMYXL|5&*2&ck!v0D<_La5^ILW3<=O{+cLcv*^S`S3axVbi
zj^O7b@NY)oqY?P?5%|v{@ZUt>rz3DNl*;DgX|c1l*EGA6yF1!;SyZvij&^I8*xk|H
zwtaVUTW3rAPSI<2x0$_WudcSYbeYNCzV7ah?shSl8nVTZ^OQYg=e=aHVA~my%4dh*
zqH*%c0T<LoQE=@-%C(clw4JvFToK8gw%039^ENj%-0I{USHcQw&Dkke?6*h6-c&x5
zvy<6;q2x(IkCV%pPeE5AnJjv#^!{Xe@BSp-a00Kbq`tExx6>KyvWvykpe;JO+LL%Y
z?owBpP!~^9U3?-fuSQYy;C6Avz_6S3Y>@%Sh=3kz*POx#4yPzb8w^J&dlW9GS9;I^
z_o6Jc+n&6P#X!M@YjHq=t@8HUEiXR?C|kCgkTx6cH>qs1i*TKeF#3)XSVvhPQ}qV;
z1eED~TBC8SFNW_!d<ud*qH)|doWEJ)$Zvp;`289uKAorPR-f&c@IxU!?e!l-;KxHa
z-Mhbvz$+nqg|5F5fj7WDKtccUtgfnQxVc*6I9~LT#{1a_ejDT8!}w1!{9cBSFgtjJ
z(EQ*V0tNfUJB|8%k@0z4US@nevxt9@;W!6`UuAagXZQ_<qdzO*Lz%D7PxR*j_{h%v
z49A!dzFFg#ar^jd2L&^<--#8F?HUi;U!l)cRP*t!*EsUgN9y+phVyy;a)g~;#(#*}
z$urzw_%Op)GyL1kJ|FLM49B9{jY1q_c0R@IoD1=ffez&@#(x;<G~PcmKF$x}GZFYz
zW{3O#PsZo||Cixd`~`d{cjLr^V8;Dlt#OJM`4eaSHPD9eEg`<HipL}HZ5qdn``^R(
z-2dGSNB=Lthcd|QaQ}ZA;{Qj{#V;9uIbh`ftBj9(m+;pj@N>)#{wYBGHyOT!;eTRw
zFurs?yvy)9#{U<?kx%F9eEo#RxN!b`3`ahltLqrf`CAx{d^%URF`V=J7|!SCYYe{|
z?9e>?R^vE~2N^!b@J}*)lHqF^KBaLSFP`UQ{~d;-|AhaA*;&W%%M8aq#E5S|83pa*
zN0QJ5!s-3pAHwPVeJF&}d-`|?r}uFsgwwlrCWO=b6`sCQ$RB#Aig<Bk$V=^k+;dgF
zmr5=?DB}1^67fvRONscNVo}85ce<>kogsY3i8%bKx8v{|d82$}>H1*46fd|=!FIh7
zXoHsQz3PppJ^Xl?0nKqp^FwA5y8d?^FH-B_Q&p}hTw93%Q3Y$U%6s%f3D+dHrQdC|
z&T(xZu8&11DQVIU(f%Y{Z%3+%N1=o^!|fBg{hENO3Pz~j40Y_EuQ{YpdwRzphC=?U
znh>9d0=91=K<C@_xaqzpHF8lX{}L-pg--U<1CxVuaC-qmYS{mRZXfn5?EgM(Gu-~T
zZoh&Y1s+Pcy$#r0@jr%-ERc#!;eLZ0&j)Hx@kjIFzOl)eCRTJ{aUEbk;r3`V9D9Jo
d0ljek81g?<h5s1lZvPeiLzUhaXcHye{(r5jJy-w$

literal 0
HcmV?d00001

diff --git a/01-introduction/src/structs.h b/01-introduction/src/structs.h
new file mode 100644
index 0000000..87c29c4
--- /dev/null
+++ b/01-introduction/src/structs.h
@@ -0,0 +1,28 @@
+#ifndef STRUCTS_H
+#define STRUCTS_H
+
+#include <SDL2/SDL.h>
+
+struct game {
+    SDL_Window *window; 
+    SDL_Renderer *renderer;
+
+    int up; 
+    int down; 
+    int left; 
+    int right;
+};
+
+struct object {
+    SDL_Texture *texture; 
+    int resolution; // of the texture/each tiles
+
+    int x; 
+    int y;
+    int scale;
+
+    // animation 
+    int state;
+};
+
+#endif 
diff --git a/README b/README
new file mode 100644
index 0000000..1aa2759
--- /dev/null
+++ b/README
@@ -0,0 +1,4 @@
+SDL Playground 
+==============
+
+My little playground for SDL.