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restructure to have en emitter

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This commit is contained in:
jonathan santis 2024-11-26 11:40:50 +01:00
parent 2d7cd53437
commit bd824f8a10
2 changed files with 90 additions and 48 deletions
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140
src/main.zig
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@ -38,7 +38,7 @@ const Particle = struct {
velocity : pr.Vec = .{.a = .{.x=0,.y=0,.z=0}},
acceleration : pr.Vec = .{.a = .{.x=0,.y=0,.z=0}},
lifespan : u8 = 0,
spawm : u8 = 1,
show : u8 = 0,
pub fn new(self:Self) void {
_ = self;
}
@ -53,27 +53,93 @@ const Particle = struct {
if (self.lifespan > 0) {
self.lifespan -= 1;
} else
{
const xrnr = randMinMaxFloat(-1,1);
const yrnr = randMinMaxFloat(-0.5,0.5);
self.lifespan = rand.intRangeAtMost(u8,75,255);
self.acceleration.a.x = xrnr;
self.acceleration.a.y = yrnr;
self.position.a.x = @floatFromInt(rl.getMouseX()-screenWidth/2);
self.position.a.y = @floatFromInt(rl.getMouseY()-screenHeight/2);
self.velocity.a.x = 0;
self.velocity.a.y = -20;
self.position.a.color.r = rand.intRangeAtMost(u8,0,30);
self.position.a.color.g = rand.intRangeAtMost(u8,0,255);
self.position.a.color.b = rand.intRangeAtMost(u8,0,255);
}
else
{
self.show = 0;
}
}
pub fn spawn(self:*Self) void
{
const xrnr = randMinMaxFloat(-1,1);
const yrnr = randMinMaxFloat(-0.5,0.5);
self.lifespan = rand.intRangeAtMost(u8,75,255);
self.acceleration.a.x = xrnr;
self.acceleration.a.y = yrnr;
self.position.a.x = @floatFromInt(rl.getMouseX()-screenWidth/2);
self.position.a.y = @floatFromInt(rl.getMouseY()-screenHeight/2);
self.velocity.a.x = 0;
self.velocity.a.y = -20;
self.position.a.color.r = rand.intRangeAtMost(u8,0,30);
self.position.a.color.g = rand.intRangeAtMost(u8,0,255);
self.position.a.color.b = rand.intRangeAtMost(u8,0,255);
self.show = 1;
}
pub fn applyGravity(self : *Self,val : f32) void {
self.velocity.a.y += val;
}
};
const Emitter = struct
{
particleCount : u32 = 0,
particles : []Particle = undefined,
pub fn init(self:*Emitter) !void
{
var xrnr = randMinMaxFloat(-1,1);
var yrnr = randMinMaxFloat(-0.5,0.5);
self.particles = try allocator.alloc(Particle,500000);
for (self.particles) |*p| {
xrnr = randMinMaxFloat(0,2);
yrnr = randMinMaxFloat(0,2);
p.* = Particle{.velocity = .{.a = .{.x = 1,.y = -3}},.acceleration = .{.a = .{.x=xrnr,.y=yrnr}}};
}
}
pub fn emit(self:*Emitter,count : u32) void
{
var i : u32 = 0;
for(self.particles) |*p|
{
if(p.show == 0)
{
i+=1;
p.spawn();
}
if(i >= count)
{
break;
}
}
}
pub fn update(self:*Emitter) void
{
var posx : i32 = 0;
var posy : i32 = 0;
for (self.particles) |*p| {
if(p.show == 1)
{
p.update();
p.applyGravity(2);
if(p.position.a.x >= -(screenWidth/2)){
posx = @intFromFloat(screenWidth / 2 + p.position.a.x);
} else {
posx = 0;
}
if(p.position.a.y >= -(screenHeight/2)){
posy = @intFromFloat(screenHeight / 2 + p.position.a.y);
} else {
posy = 0;
}
rl.drawRectangle(posx,posy,2,2,rl.Color{.r=p.position.a.color.r,.g=p.position.a.color.g,.b=p.position.a.color.b,.a=255});
}
}
}
};
fn ItoF(x:i32) f32
{
return @as(f32,@floatFromInt(x));
@ -84,7 +150,7 @@ pub fn main() anyerror!void {
//--------------------------------------------------------------------------------------
const rect2 = rl.Rectangle{ .x = @as(f32, @floatFromInt(10)), .y = @as(f32, @floatFromInt(10)), .width = @as(f32, @floatFromInt(300)), .height = @as(f32, @floatFromInt(100)) };
const rect3 = rl.Rectangle{ .x = @as(f32, @floatFromInt(200)), .y = @as(f32, @floatFromInt(150)), .width = @as(f32, @floatFromInt(600)), .height = @as(f32, @floatFromInt(10)) };
const rect3 = rl.Rectangle{ .x = @as(f32, @floatFromInt(10)), .y = @as(f32, @floatFromInt(150)), .width = @as(f32, @floatFromInt(600)), .height = @as(f32, @floatFromInt(10)) };
var msg_res : i32=-1;
var state : i32=-1;
@ -92,19 +158,11 @@ pub fn main() anyerror!void {
try std.posix.getrandom(std.mem.asBytes(&seed));
prng = std.rand.DefaultPrng.init(seed);
var xrnr : f32 = 0;
var yrnr : f32 = 0;
var posx : i32 = 0;
var posy : i32 = 0;
var value : f32 = 0;
const p1 = try allocator.alloc(Particle,500000);
for (p1) |*p| {
xrnr = rand.float(f32);
yrnr = rand.float(f32);
p.* = Particle{.velocity = .{.a = .{.x = 1,.y = -3}},.acceleration = .{.a = .{.x=xrnr,.y=yrnr}}};
}
var emitter = Emitter{};
try emitter.init();
//const img : rl.Texture = rl.loadTexture("img.png");
@ -139,30 +197,14 @@ pub fn main() anyerror!void {
else =>{},
}
}
_ = rg.guiSlider(rect3,"0","500000",&value,ItoF(0),ItoF(500000));
for (0..,p1) |i,*p| {
if(i<@as(usize,@intFromFloat(value)))
{
if(rl.isMouseButtonPressed(rl.MouseButton.mouse_button_left))
{
p.spawm = 1;
}
p.update();
p.applyGravity(2);
if(p.position.a.x >= -(screenWidth/2)){
posx = @intFromFloat(screenWidth / 2 + p.position.a.x);
} else {
posx = 0;
}
if(p.position.a.y >= -(screenHeight/2)){
posy = @intFromFloat(screenHeight / 2 + p.position.a.y);
} else {
posy = 0;
}
rl.drawRectangle(posx,posy,2,2,rl.Color{.r=p.position.a.color.r,.g=p.position.a.color.g,.b=p.position.a.color.b,.a=255});
}
_ = rg.guiSlider(rect3,"0","5000",&value,ItoF(0),ItoF(5000));
if(rl.isMouseButtonDown(rl.MouseButton.mouse_button_left))
{
emitter.emit(@as(u32,@intFromFloat(value)));
}
emitter.update();
}
}

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zig-out/bin/raylib-test
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