orca/samples/pong/src/main.c

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/************************************************************//**
*
* @file: wasm_main.cpp
* @author: Martin Fouilleul
* @date: 14/08/2022
* @revision:
*
*****************************************************************/
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#include"keys.h"
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#include"graphics.h"
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#include"orca.h"
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#define M_PI 3.14159265358979323846
extern float cosf(float x);
extern float sinf(float x);
const mg_color paddleColor = {1, 0, 0, 1};
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mp_rect paddle = {200, 40, 200, 40};
const mg_color ballColor = {1, 1, 0, 1};
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mp_rect ball = {200, 200, 60, 60};
vec2 velocity = {10, 10};
vec2 frameSize = {100, 100};
bool leftDown = false;
bool rightDown = false;
mg_canvas canvas;
mg_surface surface;
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mg_surface mg_surface_main(void);
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void OnInit(void)
{
//TODO create surface for main window
surface = mg_surface_main();
canvas = mg_canvas_create();
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file_handle file = file_open(STR8("/test_write.txt") , IO_OPEN_CREATE | IO_OPEN_WRITE);
str8 string = STR8("Hello, file!\n");
file_write(file, string.len, string.ptr);
file_close(file);
file = file_open(STR8("/dir1/test_read.txt") , IO_OPEN_READ);
u64 size = file_size(file);
char* buffer = mem_arena_alloc(mem_scratch(), size);
file_read(file, size, buffer);
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file_close(file);
log_info("read file: %.*s", (int)size, buffer);
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}
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void OnFrameResize(u32 width, u32 height)
{
log_info("frame resize %u, %u", width, height);
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frameSize.x = width;
frameSize.y = height;
}
void OnMouseDown(int button)
{
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log_info("mouse down!");
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}
void OnKeyDown(int key)
{
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if(key == KEY_SPACE)
{
log_error("(this is just for testing errors)");
return;
}
if(key == KEY_ENTER)
{
log_warning("(this is just for testing warning)");
return;
}
log_info("key down: %i", key);
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if(key == KEY_LEFT)
{
leftDown = true;
}
if(key == KEY_RIGHT)
{
rightDown = true;
}
}
void OnKeyUp(int key)
{
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if(key == KEY_ENTER || key == KEY_SPACE)
{
return;
}
log_info("key up: %i", key);
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if(key == KEY_LEFT)
{
leftDown = false;
}
if(key == KEY_RIGHT)
{
rightDown = false;
}
}
void OnFrameRefresh(void)
{
f32 aspect = frameSize.x/frameSize.y;
if(leftDown)
{
paddle.x -= 10;
}
else if(rightDown)
{
paddle.x += 10;
}
paddle.x = Clamp(paddle.x, 0, frameSize.x - paddle.w);
ball.x += velocity.x;
ball.y += velocity.y;
ball.x = Clamp(ball.x, 0, frameSize.x - ball.w);
ball.y = Clamp(ball.y, 0, frameSize.y - ball.h);
if(ball.x + ball.w >= frameSize.x)
{
velocity.x = -10;
}
if(ball.x <= 0)
{
velocity.x = +10;
}
if(ball.y + ball.h >= frameSize.y)
{
velocity.y = -10;
}
if(ball.y <= paddle.y + paddle.h
&& ball.x+ball.w >= paddle.x
&& ball.x <= paddle.x + paddle.w
&& velocity.y < 0)
{
velocity.y *= -1;
ball.y = paddle.y + paddle.h;
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log_info("PONG!");
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}
if(ball.y <= 0)
{
ball.x = frameSize.x/2. - ball.w;
ball.y = frameSize.y/2. - ball.h;
}
mg_canvas_set_current(canvas);
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mg_set_color_rgba(0, 1, 1, 1);
mg_clear();
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mg_mat2x3 transform = {1, 0, 0,
0, -1, frameSize.y};
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mg_matrix_push(transform);
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mg_set_color(paddleColor);
mg_rectangle_fill(paddle.x, paddle.y, paddle.w, paddle.h);
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mg_set_color(ballColor);
mg_circle_fill(ball.x+ball.w/2, ball.y + ball.w/2, ball.w/2.);
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mg_matrix_pop();
mg_surface_prepare(surface);
mg_render(surface, canvas);
mg_surface_present(surface);
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}