Joan: /* Instal.lació a Linux */

2018-05-22T18:55:10Z

Instal.lació a Linux

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__TOC__
=Instal.lació=
He instal.lat la llibreria '''raylib''' en una Raspberry Pi 3 i he fet les primeres proves.
*http://www.raylib.com/index.html
*https://www.raspberrypi.org/forums/viewtopic.php?t=88182
<pre>
git clone https://github.com/raysan5/raylib.git
sudo apt install libopenal1 libopenal-dev libglfw3
#maybe libglfw3 can be skipped since we are using GLES
cd raylib/src/

make PLATFORM=PLATFORM_RPI
sudo make install

</pre>
Sense fer cap canvi en el Makefile compila bé, però després no troba una llibreria.

O sigui que faig en el Makefile el canvi que es proposa:
<pre>
# Use cross-compiler for PLATFORM_RPI
ifeq ($(PLATFORM),PLATFORM_RPI)
RPI_CROSS_COMPILE ?= NO
RPI_TOOLCHAIN ?=
RPI_TOOLCHAIN_SYSROOT ?=
endif
</pre>
compila bé el Make, però quan vull fer ''sudo make install'' busca la llibreria estàtica a /home/pi/raylib/release/libs/linux en comptes de /home/pi/raylib/release/libs/rpi, que és on realment està. Per tant, la copio allà on es pensa que està, i ja funcionarà tot:
<pre>
$ cp /home/pi/raylib/release/libs/rpi/libraylib.a /home/pi/raylib/release/libs/linux
sudo make install
</pre>

This installs the static library and headerfiles in /usr/local/lib and /usr/local/include.

So to test the installation I just copied out one of the examples and checked what options was needed to compile it.
<pre>
$ gcc core_basic_window.c -L/opt/vc/lib/ -lraylib -lbrcmGLESv2 -lbrcmEGL -lpthread -lrt -lm -lbcm_host -lopenal

this created the file a.out which I ran with "./a.out"

PS: Some examples also need the "-std=c99" option.
PPS: Older versions of raspbian can probably remove the "brcm" letters from the library names, I think they came in Stretch. Check your "/opt/vc/lib" directory.
</pre>
(ha funcionat)

Enllaç directe de descàrrega del codi:
*https://github.com/raysan5/raylib/blob/master/examples/core/core_basic_window.c

També compila l'exemple bàsic amb C++:
<pre>
$ g++ core_basic_window.cpp -L/opt/vc/lib/ -lraylib -lbrcmGLESv2 -lbrcmEGL -lpthread -lrt -lm -lbcm_host -lopenal -o core_basic_window
</pre>
I també he provat i han funcionat els exemples:
*core_input_mouse.c
*master/examples/models/models_box_collisions.c

=Exemple bàsic: core_basic_window.c=
<pre>
/*******************************************************************************************
*
* raylib [core] example - Basic window
*
* Welcome to raylib!
*
* To test examples, just press F6 and execute raylib_compile_execute script
* Note that compiled executable is placed in the same folder as .c file
*
* You can find all basic examples on C:\raylib\raylib\examples folder or
* raylib official webpage: www.raylib.com
*
* Enjoy using raylib. :)
*
* This example has been created using raylib 1.0 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2013-2016 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

int main()
{
// Initialization
//--------------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;

InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");

SetTargetFPS(60);
//--------------------------------------------------------------------------------------

// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
// TODO: Update your variables here
//----------------------------------------------------------------------------------

// Draw
//----------------------------------------------------------------------------------
BeginDrawing();

ClearBackground(RAYWHITE);

DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);

EndDrawing();
//----------------------------------------------------------------------------------
}

// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------

return 0;
}
</pre>
=Instal.lació a Linux=
*https://github.com/raysan5/raylib/wiki/Working-on-GNU-Linux
<pre>
$ sudo apt install build-essential git

$ sudo apt install libasound2-dev mesa-common-dev libx11-dev libxrandr-dev libxi-dev xorg-dev libgl1-mesa-dev libglu1-mesa-dev
</pre>
You can compile three different types of raylib library:
*The static library (default method)
*The dynamic shared library (often used on Linux)
*The web library
Nosaltres fem l'opció estàndar, que és la ''dynamic shared library''.
<pre>
$ git clone https://github.com/raysan5/raylib.git raylib
$ cd raylib/src/
$ make PLATFORM=PLATFORM_DESKTOP RAYLIB_LIBTYPE=SHARED # To make the dynamic shared version. - Recommended
$ sudo make install RAYLIB_LIBTYPE=SHARED # Dynamic shared version
</pre>
Per muntar tots els exemples que estan dins la carpeta ''examples/'':
<pre>
$ cd raylib/examples
$ make PLATFORM=PLATFORM_DESKTOP RAYLIB_LIBTYPE=SHARED
</pre>
i es compilen tots els exemples (es poden fer coses xules).

A more detailed command for the OpenGL ES GRAPHICS variant on Ubuntu 16.04 is:
<pre>
$ make PLATFORM=PLATFORM_DESKTOP GRAPHICS=GRAPHICS_API_OPENGLES_20 RAYLIB_LIBTYPE=SHARED USE_EXTERNAL_GLFW=TRUE \
CFLAGS="-fPIC -I/usr/include/GL" LDFLAGS='-L/usr/local/lib/raysan5 -lGLESv2 -lglfw3'
</pre>
<pre>
To compile just one specific example, add flags as needed:

make core/core_basic_window PLATFORM=PLATFORM_DESKTOP

To force recompile one example:

make core/core_basic_window PLATFORM=PLATFORM_DESKTOP -B
</pre>
I també compilo tots els jocs:
<pre>
$ cd raylib/games
$ make PLATFORM=PLATFORM_DESKTOP RAYLIB_LIBTYPE=SHARED
</pre>
Per compilar un exemple concret, per exemple el tetris:
<pre>
$ gcc -o tetris tetris.c -O1 -s -Wall -std=c99 -D_DEFAULT_SOURCE -Wno-missing-braces -D_DEFAULT_SOURCE -I. -I../release/include -I../src -I../src/external -L. -L../release/libs/linux -L../src -lraylib -lGL -lm -lpthread -ldl -lrt -lX11 -DPLATFORM_DESKTOP
</pre>
==Fullscreen==
''src/core.c'', a la línia 285:
<pre>
static bool fullscreen = true; // Fullscreen mode (useful only for PLATFORM_DESKTOP)
</pre>
Hem de tornar a compilar tots els projectes, i ara per defecte, a Linux/Ubuntu, tots els exemples i games ja funcionen a fullscreen. (A la RPi, per defecte ja tots els exemples estaven a fullscreen).

{{Autor}}, maig 2018

Llibreria raylib (videojocs) a la Raspberry Pi - Historial de revisió

Joan: /* Instal.lació a Linux */