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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。6 Z1 W% R" [! O# R& K- V
- importPackage (java.lang);9 ]- r+ |: ?1 Q: X8 X0 b
- importPackage (java.awt);5 j4 P1 ?' Y& ^# }: I I3 I' C
- 6 b& y3 G( }9 O) ^ P W
- include(Resources.id("mtrsteamloco:library/code/face.js"));; A _7 |7 R% D+ ]; E+ F! W" b( U
- 1 @! L; ? k& }! t, Y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
- H' K* X: Z/ g1 V- t$ } - let frc = Resources.getFontRenderContext();
: c2 C7 O. O% \" h0 |5 q. o- m - bounds = font.getStringBounds(str, frc);: T y; Z" b2 m) j n, U# S' x- G
- return Math.ceil(bounds.getWidth());
( s& ?& W$ I/ M# J2 r: u2 o; V" ?; ` - }
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- da = (g) => {//底图绘制' l3 O, D+ \1 H2 L' ^
- g.setColor(Color.BLACK);% V0 ?5 K- {( `' Y: }* d! E
- g.fillRect(0, 0, 400, 400);7 b; _" s( g; k A. X" u) f
- }
- C- D# c2 |. P
5 v# K2 k/ [; l2 i+ T& k- db = (g) => {//上层绘制- [& W/ |5 D3 X+ v9 P
- g.setColor(Color.WHITE);
" W. y/ P: H+ ]0 c- ~ - g.fillRect(0, 0, 400, 400);" \, h4 Q$ f% g' p2 g
- g.setColor(Color.RED);
+ a$ u0 [( K- |7 y6 r - g.setFont(font0);2 l- [. w6 u M, ]# y
- let str = "晴纱是男娘";
; h Z4 ^$ o0 [1 z# H d0 i7 K3 d - let ww = 400;
. M' C2 r6 h1 i# q9 d8 P - let w = getW(str, font0);5 H4 m! q9 o* \4 T
- g.drawString(str, ww / 2 - w / 2, 200);
3 g1 x1 b- U% @( p, A, ^" u - }
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- const mat = new Matrices();
) X+ k8 o. z6 H% d+ v W3 K4 @) U - mat.translate(0, 0.5, 0);6 U' B/ Q( C1 R: `1 [+ \* F
- " t q. s3 H e7 X4 k1 @
- function create(ctx, state, entity) {' I h8 S, r i( M8 g( ~8 C
- let info = {
$ N0 U H: X* ] - ctx: ctx,. [0 N$ l, `2 |' g: R; Z- ~# h0 i
- isTrain: false,& e. Q1 {# d# l9 Q% Q1 |
- matrices: [mat],* J/ G* H9 H0 x* U; L
- texture: [400, 400],
8 d0 c5 G- |9 }, S - model: {& V% p; U4 R% c5 L0 z% P( Y
- renderType: "light",
/ u9 T/ R9 L5 }5 k - size: [1, 1],
3 j& Z& `2 W+ U, ]6 ]8 J - uvSize: [1, 1]1 s+ V* K$ t2 K8 H4 z ^
- }
6 L1 |! q+ y6 N' H! l$ E - }
5 w! B0 e2 X7 a- m" J& T8 B/ P5 o% p - let f = new Face(info);
) }8 ]/ G R# S7 O; g - state.f = f;
4 R Z% v3 x2 g; U4 }
6 R9 G/ f' S2 |8 D: T- let t = f.texture;
6 x' P% c) E+ u1 j7 y6 @ - let g = t.graphics;+ l& v1 S- q% a: }! E5 j
- state.running = true;0 P5 V( d6 n$ t* ~! o- I. ]+ ~
- let fps = 24;! F: L4 K# T& K" b# i
- da(g);//绘制底图
& y4 K+ r2 S3 K$ D( m1 k% V - t.upload();
0 V' S0 R1 d8 w; M2 ]. O3 e4 B - let k = 0;
1 I) w* `. q- {' Y3 |2 }- y - let ti = Date.now();/ t) w3 D/ c/ v' S/ |
- let rt = 0;
& {) O, B$ i( @% V5 [ - smooth = (k, v) => {// 平滑变化
& ]8 B, @) C- e/ G, }; ?! W - if (v > k) return k;
|5 H' {( K& x" w+ j, u - if (k < 0) return 0;0 b5 r( L$ _. x
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: s+ A6 x3 X) y- `1 |: K1 ]* S - }$ Q2 r7 O8 Z* J K$ G# U! x% l
- run = () => {// 新线程, `3 J* v& m# L
- let id = Thread.currentThread().getId();: C" _0 _; ^ b8 T, l
- print("Thread start:" + id);& M' A/ P1 B( ^$ L9 B: a
- while (state.running) {
+ V+ s( d. L$ f- u- T4 r - try {
4 |3 q1 f7 d- G% Z: f# ` - k += (Date.now() - ti) / 1000 * 0.2;
& N4 O" e+ v( b8 A - ti = Date.now();
9 ?8 l9 `: [: C# K' |# a' E9 @; W - if (k > 1.5) {
3 d4 X! G! _8 h* D. F6 v - k = 0;
: F6 y) z; g% P1 b6 f/ m0 X" } - }" G5 X5 Q W2 B# A$ o
- setComp(g, 1);
* l* B/ F& p) _( t, q5 Q - da(g);! {" ]% p$ v5 F' D8 D
- let kk = smooth(1, k);//平滑切换透明度6 @; H! a8 {0 z' |! e2 Z" W: f$ }
- setComp(g, kk);" X% e V; n$ B1 M Q, ^4 |
- db(g);1 V8 h' `8 Q7 ]* Y9 f. L( I/ Y3 Z
- t.upload();3 j; y3 z7 J3 O" p# n& K' p W
- ctx.setDebugInfo("rt" ,Date.now() - ti);* x1 M+ P9 @7 e2 M
- ctx.setDebugInfo("k", k);
: \0 ]$ w( [+ ?3 \ - ctx.setDebugInfo("sm", kk);
, K8 z9 V/ n& i: t' F6 R - rt = Date.now() - ti;
" _# y _* T4 W5 z6 g+ s - Thread.sleep(ck(rt - 1000 / fps));( @ o- ~8 c; u. O7 y. o2 T9 c5 o q& R
- ctx.setDebugInfo("error", 0)" M3 \" g3 w5 R% r# D) c
- } catch (e) {! k8 ?* m4 n3 h5 ]' B+ s T( s
- ctx.setDebugInfo("error", e);
. R' P; W, J2 }% A# ~: w - }
+ `1 b/ @3 h3 [: F% z - }
+ O! P/ I; o$ u, A9 G1 J2 K# J - print("Thread end:" + id);9 s5 F& _' t S: E; ~2 \8 x+ H
- }. g) T! w1 D/ ~/ p" N
- let th = new Thread(run, "qiehuan");$ m$ O: v. ?' [* l4 G
- th.start();
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( q% e! C9 U' E( X) y* I/ X, j- function render(ctx, state, entity) {
; C) q5 s5 p$ o( q9 t; O! d. s - state.f.tick();; c: p, Z. d- x+ o
- }/ j: x# `5 @5 P
- * f3 I* `! I7 W9 [ _' S
- function dispose(ctx, state, entity) {
4 r8 Z9 t. v2 K! e1 r - print("Dispose");
7 s$ |4 r5 U1 w& \ - state.running = false;0 H- i- J* \7 [; r8 M, g% u
- state.f.close();4 Q+ [( C, L5 Y) q" A; D
- }6 P4 q$ T- r% E+ q4 b4 Q9 |& V
- % ~: c: L9 e: g
- function setComp(g, value) {- L9 M7 k$ Y# B+ m5 v0 n: v7 [% l2 Y
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: S% }; c4 X, l/ H+ ]* g - }
复制代码 6 u1 j4 Z* [0 b* `
写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。6 t5 r, s6 `; \
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& D8 h- u. G3 a, O$ ^顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- B8 k. b* J1 F% s: f# f- I& [
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