rework part of particles and utils
This commit is contained in:
jonathan santis
parent
ec5fc69ae5
commit
e07b6caa19
283
src/main.zig
283
src/main.zig
@ -2,221 +2,14 @@ const std = @import("std");
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const rl = @import("raylib");
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const rg = @import("raygui");
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const pr = @import("primitives.zig");
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const particles = @import("particles.zig");
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const plot = @import("plot.zig");
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const allocator = std.heap.page_allocator;
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var prng = std.rand.DefaultPrng.init(124346234556);
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const rand = prng.random();
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const screenWidth = 1200;
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const screenHeight = 800;
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fn randMinMaxFloat(min: f32, max: f32) f32 {
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var r1 = rand.float(f32);
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r1 = 2 * (r1 - 0.5); //-0.5..0.5
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return (@abs(min) + @abs(max)) / 2 * r1;
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}
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const Particle = struct {
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const Self = @This();
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position: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
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velocity: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
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acceleration: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
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lifespan: u8 = 0,
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show: u8 = 0,
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size: f32 = 0,
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pub fn new(self: Self) void {
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_ = self;
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}
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pub fn update(self: *Self) void {
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self.velocity.add(self.acceleration);
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self.position.add(self.velocity);
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if (self.position.a.y > screenHeight) {
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self.velocity.a.y *= -0.9;
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// self.acceleration.a.y *= -0.5;
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}
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if (self.lifespan > 0) {
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self.lifespan -= 1;
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} else {
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self.show = 0;
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}
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self.acceleration.a.x = 0;
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self.acceleration.a.y = 0;
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self.acceleration.a.z = 0;
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}
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pub fn spawn(self: *Self, xaccel: f32, yaccel: f32) void {
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const xrnr = randMinMaxFloat(-xaccel, xaccel);
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const yrnr = randMinMaxFloat(-yaccel, yaccel);
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self.size = randMinMaxFloat(-2,2);
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self.lifespan = rand.intRangeAtMost(u8, 75, 255);
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self.acceleration.a.x = xrnr;
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self.acceleration.a.y = yrnr;
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self.position.a.x = @floatFromInt(rl.getMouseX() - screenWidth / 2);
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self.position.a.y = @floatFromInt(rl.getMouseY() - screenHeight / 2);
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self.velocity.a.x = 0;
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self.velocity.a.y = 0;
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self.position.a.color.r = rand.intRangeAtMost(u8, 0, 30);
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self.position.a.color.g = rand.intRangeAtMost(u8, 0, 255);
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self.position.a.color.b = rand.intRangeAtMost(u8, 0, 255);
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self.show = 1;
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}
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pub fn applyGravity(self: *Self, val: f32) void {
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self.velocity.a.y += val;
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}
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pub fn applyForce(self: *Self, vec: pr.Vec) void {
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self.acceleration.a.x += vec.a.x * 0.8;
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self.acceleration.a.y += vec.a.y * 0.8;
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self.acceleration.a.z = vec.a.z;
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self.velocity.a.x *= 0.995;
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self.velocity.a.y *= 0.995;
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}
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};
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const Emitter = struct {
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particleCount: u32 = 0,
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particles: []Particle = undefined,
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pub fn init(self: *Emitter) !void {
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var xrnr = randMinMaxFloat(-1, 1);
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var yrnr = randMinMaxFloat(-0.5, 0.5);
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self.particles = try allocator.alloc(Particle, 500000);
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for (self.particles) |*p| {
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xrnr = randMinMaxFloat(-2, 2);
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yrnr = randMinMaxFloat(-2, 2);
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p.* = Particle{ .velocity = .{ .a = .{ .x = 0, .y = 0 } }, .acceleration = .{ .a = .{ .x = xrnr, .y = yrnr } } };
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}
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}
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pub fn emit(self: *Emitter, count: u32, xaccel: f32, yaccel: f32) void {
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var i: u32 = 0;
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for (self.particles) |*p| {
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if (p.show == 0) {
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i += 1;
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p.spawn(xaccel, yaccel);
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}
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if (i >= count) {
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break;
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}
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}
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}
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pub fn update(self: *Emitter,att : []Attractor, texture: rl.Texture2D, color : rl.Color) void {
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var posx: i32 = 0;
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var posy: i32 = 0;
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var vec2 : rl.Vector2=undefined;
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if (rl.isMouseButtonPressed(rl.MouseButton.mouse_button_right)) {
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for (att) |*at|
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{
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if(at.init_done != 1)
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{
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at.init(.{.a=.{.x=@floatFromInt(rl.getMouseX() - screenWidth / 2),.y=@floatFromInt(rl.getMouseY() - screenHeight / 2),.z=0}});
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at.mode = 1;
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break;
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}
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}
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}
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if (rl.isMouseButtonPressed(rl.MouseButton.mouse_button_middle)) {
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for (att) |*at|
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{
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if(at.init_done != 1)
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{
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at.init(.{.a=.{.x=@floatFromInt(rl.getMouseX() - screenWidth / 2),.y=@floatFromInt(rl.getMouseY() - screenHeight / 2),.z=0}});
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at.mode = 0;
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break;
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}
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}
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}
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for (att) |at|
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{
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at.draw();
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}
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for (self.particles) |*p| {
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if (p.show == 1) {
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//p.applyGravity(2);
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for (att) |at|
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{
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if(at.mode == 0)
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{
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p.applyForce(at.attract(p.*));
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}
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else
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{
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p.applyForce(at.repel(p.*));
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}
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}
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p.update();
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if(p.position.a.x < 10000 and p.position.a.x > -10000)
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{
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posx = @intFromFloat(screenWidth / 2 + p.position.a.x);
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}
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if(p.position.a.y < 10000 and p.position.a.y > -10000)
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{
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posy = @intFromFloat(screenHeight / 2 + p.position.a.y);
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}
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//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});
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vec2 = .{.x = (screenWidth/2+p.position.a.x),.y = (screenHeight/2+p.position.a.y)};
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rl.drawTextureEx(texture, vec2,0.5,p.size, color);
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}
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}
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}
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};
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const Attractor = struct {
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vec: pr.Vec,
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init_done : u8 = 0,
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mode : u8 = 0,
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pub fn init(self : *Attractor, vec : pr.Vec) void
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{
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self.vec = vec;
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self.init_done = 1;
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}
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pub fn attract(self: Attractor, particle: Particle) pr.Vec {
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if(self.init_done == 1)
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{
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const distance = self.vec.sub(particle.position);
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var force: pr.Vec = undefined;
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if (distance.a.x != 0 and distance.a.y != 0) {
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force.a.x = distance.a.x * @abs(1/distance.a.x);
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force.a.y = distance.a.y * @abs(1/distance.a.y);
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force.a.z = 0;
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}
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return force;
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}
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else
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{
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return .{.a=.{.x=0,.y=0,.z=0}};
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}
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}
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pub fn repel(self: Attractor, particle: Particle) pr.Vec {
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if(self.init_done == 1)
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{
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const distance = self.vec.sub(particle.position);
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var force: pr.Vec = undefined;
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if (distance.a.x != 0 and distance.a.y != 0) {
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force.a.x = -distance.a.x * @abs(1/distance.a.x);
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force.a.y = -distance.a.y * @abs(1/distance.a.y);
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force.a.z = 0;
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}
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return force;
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}
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else
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{
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return .{.a=.{.x=0,.y=0,.z=0}};
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}
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}
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pub fn draw(self: Attractor) void {
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const posx: i32 = @intFromFloat(screenWidth / 2 + self.vec.a.x);
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const posy: i32 = @intFromFloat(screenHeight / 2 + self.vec.a.y);
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if (self.init_done == 1)
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{
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rl.drawRectangle(posx, posy, 10, 10, rl.Color{ .r = 10, .g = 10, .b = 120, .a = 255 });
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}
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}
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};
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fn ItoF(x: i32) f32 {
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return @as(f32, @floatFromInt(x));
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}
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@ -225,20 +18,13 @@ fn rectangle(x: u16, y: u16, width: u16, height: u16) rl.Rectangle {
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}
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pub fn main() anyerror!void {
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var seed: u64 = undefined;
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try std.posix.getrandom(std.mem.asBytes(&seed));
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prng = std.rand.DefaultPrng.init(seed);
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var value: f32 = 0;
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var value2: f32 = 0;
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var value3: f32 = 0;
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var color: rl.Color = undefined;
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var emitter = Emitter{};
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try emitter.init();
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var emitter = particles.Emitter{};
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try emitter.init(allocator, screenWidth, screenHeight);
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//const img : rl.Texture = rl.loadTexture("img.png");
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rl.initWindow(screenWidth, screenHeight, "raylib-zig [core] example - basic window");
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@ -253,16 +39,16 @@ pub fn main() anyerror!void {
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std.posix.exit(1);
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}
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rl.unloadImage(image);
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rl.setTargetFPS(60);
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const file = try plot.open("plot.dat");
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var plotStr : []u8 = undefined;
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var plotStrBuf : [128]u8 = undefined;
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try plot.log(file,"acceleration, position, velocity, show\n");
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var att: [10]Attractor = undefined;
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var active : i32 = 0;
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var editMode : bool = false;
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var plotStr: []u8 = undefined;
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var plotStrBuf: [128]u8 = undefined;
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try plot.log(file, "acceleration, position, velocity, show\n");
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var att: [10]particles.Attractor = undefined;
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var active: i32 = 0;
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var editMode: bool = false;
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while (!rl.windowShouldClose()) { // Detect window close button or ESC key
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rl.beginDrawing();
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@ -275,15 +61,13 @@ pub fn main() anyerror!void {
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.a = 255,
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});
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if(rg.guiDropdownBox(rectangle(10,10,100,20),"Settings;Particles",&active,editMode) != 0) {
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if (rg.guiDropdownBox(rectangle(10, 10, 100, 20), "Settings;Particles", &active, editMode) != 0) {
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editMode = !editMode;
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std.debug.print("dropdownbox: {}",.{active});
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std.debug.print("dropdownbox: {}", .{active});
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}
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if(active == 1)
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{
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if(rg.guiWindowBox(rectangle(10,10,800,600),"Window Box") == 1)
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{
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if (active == 1) {
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if (rg.guiWindowBox(rectangle(10, 10, 800, 600), "Window Box") == 1) {
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active = 0;
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editMode = false;
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}
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@ -291,24 +75,22 @@ pub fn main() anyerror!void {
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_ = rg.guiSlider(rectangle(10, 150, 600, 10), "0", "500", &value, ItoF(0), ItoF(500));
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_ = rg.guiSlider(rectangle(10, 170, 600, 10), "-3", "3", &value2, ItoF(-100), ItoF(100));
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_ = rg.guiSlider(rectangle(10, 190, 600, 10), "-3", "3", &value3, -100, 100);
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_ = rg.guiColorPicker(rectangle(10,200,300,100),"Choose Color", &color);
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_ = rg.guiColorPicker(rectangle(10, 200, 300, 100), "Choose Color", &color);
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}
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else
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{
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if (rl.isMouseButtonDown(rl.MouseButton.mouse_button_left)) {
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emitter.emit(@as(u32, @intFromFloat(value)), value2, value3);
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}
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plotStr = try std.fmt.bufPrint(&plotStrBuf,"{d}, {d}, {d}, {d}\n",.{emitter.particles[0].acceleration.a.x,emitter.particles[0].position.a.x,emitter.particles[0].velocity.a.x,emitter.particles[0].show});
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try plot.log(file,plotStr);
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rl.beginBlendMode(rl.BlendMode.blend_additive);
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emitter.update(&att,texture,color);
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rl.endBlendMode();
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if (rl.isMouseButtonDown(rl.MouseButton.mouse_button_left)) {
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emitter.emit(@as(u32, @intFromFloat(value)), value2, value3);
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}
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plotStr = try std.fmt.bufPrint(&plotStrBuf, "{d}, {d}, {d}, {d}\n", .{ emitter.particles[0].acceleration.a.x, emitter.particles[0].position.a.x, emitter.particles[0].velocity.a.x, emitter.particles[0].show });
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try plot.log(file, plotStr);
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rl.beginBlendMode(rl.BlendMode.blend_additive);
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emitter.update(&att, texture, color);
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rl.endBlendMode();
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}
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plot.close(file);
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}
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fn updateGUI() !void {}
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test "simple test" {
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var list = std.ArrayList(i32).init(std.testing.allocator);
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@ -316,18 +98,3 @@ test "simple test" {
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try list.append(42);
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try std.testing.expectEqual(@as(i32, 42), list.pop());
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}
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test "random" {
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var seed: u64 = undefined;
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var r1: f32 = undefined;
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try std.posix.getrandom(std.mem.asBytes(&seed));
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prng = std.rand.DefaultPrng.init(seed);
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while (true) {
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r1 = randMinMaxFloat(-10, 10);
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//std.debug.print("randMinMaxFloat:{}\n",.{r1});
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if (r1 > 8 or r1 < -8) {
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std.debug.print("Greater:{}\n", .{r1});
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}
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}
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}
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203
src/particles.zig
Normal file
203
src/particles.zig
Normal file
@ -0,0 +1,203 @@
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const pr = @import("primitives.zig");
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const utils = @import("utils.zig");
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const std = @import("std");
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const rl = @import("raylib");
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var prng = std.rand.DefaultPrng.init(124346234556);
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const rand = prng.random();
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pub const Particle = struct {
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const Self = @This();
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position: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
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velocity: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
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acceleration: pr.Vec = .{ .a = .{ .x = 0, .y = 0, .z = 0 } },
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lifespan: u8 = 0,
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show: u8 = 0,
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size: f32 = 0,
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max_x: i32 = 0,
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max_y: i32 = 0,
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pub fn new(self: *Self, max_x: i32, max_y: i32) void {
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self.max_x = max_x;
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self.max_y = max_y;
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}
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pub fn update(self: *Self) void {
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self.velocity.add(self.acceleration);
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self.position.add(self.velocity);
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//this is ambigous
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//must fix!!
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if (self.position.a.y > @as(f32, @floatFromInt(self.max_y))) {
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self.velocity.a.y *= -0.9;
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// self.acceleration.a.y *= -0.5;
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}
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if (self.lifespan > 0) {
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self.lifespan -= 1;
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} else {
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self.show = 0;
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}
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self.acceleration.a.x = 0;
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self.acceleration.a.y = 0;
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self.acceleration.a.z = 0;
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}
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pub fn spawn(self: *Self, xaccel: f32, yaccel: f32) void {
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const xrnr = utils.randMinMaxFloat(-xaccel, xaccel);
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const yrnr = utils.randMinMaxFloat(-yaccel, yaccel);
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self.size = utils.randMinMaxFloat(-2, 2);
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self.lifespan = rand.intRangeAtMost(u8, 75, 255);
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self.acceleration.a.x = xrnr;
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self.acceleration.a.y = yrnr;
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self.position.a.x = @floatFromInt(rl.getMouseX() - @divTrunc(self.max_x, 2));
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std.debug.print("divtrunc x: {}\n,max_x:{}\n", .{ @divTrunc(self.max_x, 2), self.max_x });
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self.position.a.y = @floatFromInt(rl.getMouseY() - @divTrunc(self.max_y, 2));
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self.velocity.a.x = 0;
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self.velocity.a.y = 0;
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self.position.a.color.r = rand.intRangeAtMost(u8, 0, 30);
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self.position.a.color.g = rand.intRangeAtMost(u8, 0, 255);
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self.position.a.color.b = rand.intRangeAtMost(u8, 0, 255);
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self.show = 1;
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}
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pub fn applyGravity(self: *Self, val: f32) void {
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self.velocity.a.y += val;
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}
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pub fn applyForce(self: *Self, vec: pr.Vec) void {
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self.acceleration.a.x += vec.a.x * 0.8;
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self.acceleration.a.y += vec.a.y * 0.8;
|
||||
self.acceleration.a.z = vec.a.z;
|
||||
self.velocity.a.x *= 0.995;
|
||||
self.velocity.a.y *= 0.995;
|
||||
}
|
||||
};
|
||||
pub const Emitter = struct {
|
||||
particleCount: u32 = 0,
|
||||
particles: []Particle = undefined,
|
||||
max_x: i32 = 0,
|
||||
max_y: i32 = 0,
|
||||
|
||||
pub fn init(self: *Emitter, allocator: std.mem.Allocator, max_x: i32, max_y: i32) !void {
|
||||
var xrnr = utils.randMinMaxFloat(-1, 1);
|
||||
var yrnr = utils.randMinMaxFloat(-0.5, 0.5);
|
||||
|
||||
self.max_x = max_x;
|
||||
self.max_y = max_y;
|
||||
self.particles = try allocator.alloc(Particle, 500000);
|
||||
for (self.particles) |*p| {
|
||||
xrnr = utils.randMinMaxFloat(-2, 2);
|
||||
yrnr = utils.randMinMaxFloat(-2, 2);
|
||||
p.* = Particle{ .velocity = .{ .a = .{ .x = 0, .y = 0 } }, .acceleration = .{ .a = .{ .x = xrnr, .y = yrnr } } };
|
||||
p.*.new(self.max_x, self.max_y);
|
||||
}
|
||||
}
|
||||
pub fn emit(self: *Emitter, count: u32, xaccel: f32, yaccel: f32) void {
|
||||
var i: u32 = 0;
|
||||
for (self.particles) |*p| {
|
||||
if (p.show == 0) {
|
||||
i += 1;
|
||||
p.spawn(xaccel, yaccel);
|
||||
}
|
||||
if (i >= count) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
pub fn update(self: *Emitter, att: []Attractor, texture: rl.Texture2D, color: rl.Color) void {
|
||||
var posx: i32 = 0;
|
||||
var posy: i32 = 0;
|
||||
|
||||
var vec2: rl.Vector2 = undefined;
|
||||
|
||||
if (rl.isMouseButtonPressed(rl.MouseButton.mouse_button_right)) {
|
||||
for (att) |*at| {
|
||||
if (at.init_done != 1) {
|
||||
at.init(.{ .a = .{ .x = @floatFromInt(rl.getMouseX() - @divTrunc(self.max_x, 2)), .y = @floatFromInt(rl.getMouseY() - @divTrunc(self.max_y, 2)), .z = 0 } }, self.max_x, self.max_y);
|
||||
at.mode = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (rl.isMouseButtonPressed(rl.MouseButton.mouse_button_middle)) {
|
||||
for (att) |*at| {
|
||||
if (at.init_done != 1) {
|
||||
at.init(.{ .a = .{ .x = @floatFromInt(rl.getMouseX() - @divTrunc(self.max_x, 2)), .y = @floatFromInt(rl.getMouseY() - @divTrunc(self.max_y, 2)), .z = 0 } }, self.max_x, self.max_y);
|
||||
at.mode = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (att) |at| {
|
||||
at.draw();
|
||||
}
|
||||
for (self.particles) |*p| {
|
||||
if (p.show == 1) {
|
||||
//p.applyGravity(2);
|
||||
for (att) |at| {
|
||||
if (at.mode == 0) {
|
||||
p.applyForce(at.attract(p.*));
|
||||
} else {
|
||||
p.applyForce(at.repel(p.*));
|
||||
}
|
||||
}
|
||||
p.update();
|
||||
|
||||
if (p.position.a.x < 10000 and p.position.a.x > -10000) {
|
||||
posx = @intFromFloat(@as(f32, @floatFromInt(self.max_x)) / 2 + p.position.a.x);
|
||||
}
|
||||
if (p.position.a.y < 10000 and p.position.a.y > -10000) {
|
||||
posy = @intFromFloat(@as(f32, @floatFromInt(self.max_y)) / 2 + p.position.a.y);
|
||||
}
|
||||
//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});
|
||||
vec2 = .{ .x = (@as(f32, @floatFromInt(self.max_x)) / 2 + p.position.a.x), .y = (@as(f32, @floatFromInt(self.max_y)) / 2 + p.position.a.y) };
|
||||
rl.drawTextureEx(texture, vec2, 0.5, p.size, color);
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
pub const Attractor = struct {
|
||||
vec: pr.Vec,
|
||||
init_done: u8 = 0,
|
||||
mode: u8 = 0,
|
||||
max_x: i32 = 0,
|
||||
max_y: i32 = 0,
|
||||
pub fn init(self: *Attractor, vec: pr.Vec, max_x: i32, max_y: i32) void {
|
||||
self.vec = vec;
|
||||
self.init_done = 1;
|
||||
self.max_x = max_x;
|
||||
self.max_y = max_y;
|
||||
}
|
||||
pub fn attract(self: Attractor, particle: Particle) pr.Vec {
|
||||
if (self.init_done == 1) {
|
||||
const distance = self.vec.sub(particle.position);
|
||||
var force: pr.Vec = undefined;
|
||||
if (distance.a.x != 0 and distance.a.y != 0) {
|
||||
force.a.x = distance.a.x / 10 * @abs(1 / distance.a.x);
|
||||
force.a.y = distance.a.y / 10 * @abs(1 / distance.a.y);
|
||||
force.a.z = 0;
|
||||
}
|
||||
return force;
|
||||
} else {
|
||||
return .{ .a = .{ .x = 0, .y = 0, .z = 0 } };
|
||||
}
|
||||
}
|
||||
pub fn repel(self: Attractor, particle: Particle) pr.Vec {
|
||||
if (self.init_done == 1) {
|
||||
const distance = self.vec.sub(particle.position);
|
||||
var force: pr.Vec = undefined;
|
||||
if (distance.a.x != 0 and distance.a.y != 0) {
|
||||
force.a.x = -distance.a.x / 10 * @abs(1 / distance.a.x);
|
||||
force.a.y = -distance.a.y / 10 * @abs(1 / distance.a.y);
|
||||
force.a.z = 0;
|
||||
}
|
||||
return force;
|
||||
} else {
|
||||
return .{ .a = .{ .x = 0, .y = 0, .z = 0 } };
|
||||
}
|
||||
}
|
||||
pub fn draw(self: Attractor) void {
|
||||
const posx: i32 = @intFromFloat(@as(f32, @floatFromInt(self.max_x)) / 2 + self.vec.a.x);
|
||||
const posy: i32 = @intFromFloat(@as(f32, @floatFromInt(self.max_y)) / 2 + self.vec.a.y);
|
||||
if (self.init_done == 1) {
|
||||
rl.drawRectangle(posx, posy, 10, 10, rl.Color{ .r = 10, .g = 10, .b = 120, .a = 255 });
|
||||
}
|
||||
}
|
||||
};
|
||||
16
src/utils.zig
Normal file
16
src/utils.zig
Normal file
@ -0,0 +1,16 @@
|
||||
const std = @import("std");
|
||||
|
||||
var prng = std.rand.DefaultPrng.init(124346234556);
|
||||
const rand = prng.random();
|
||||
|
||||
pub fn init() void {
|
||||
var seed: u64 = undefined;
|
||||
try std.posix.getrandom(std.mem.asBytes(&seed));
|
||||
prng = std.rand.DefaultPrng.init(seed);
|
||||
}
|
||||
|
||||
pub fn randMinMaxFloat(min: f32, max: f32) f32 {
|
||||
var r1 = rand.float(f32);
|
||||
r1 = 2 * (r1 - 0.5); //-0.5..0.5
|
||||
return (@abs(min) + @abs(max)) / 2 * r1;
|
||||
}
|
||||
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Reference in New Issue
Block a user