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2 z9 S9 x+ z' x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。1 b* o% I) ^6 f3 }2 B+ K6 |
- importPackage (java.lang);; W S' b+ S! S* K6 r; M4 `
- importPackage (java.awt);
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0 I; g. ~. n2 p. Q- include(Resources.id("mtrsteamloco:library/code/face.js"));6 E O* H5 ^5 p5 e/ D7 P- J
7 F6 r- i- W5 X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 V5 D% A0 r! l7 y8 K0 z+ n
- + J3 D8 W* W5 x+ f, ]' A/ g! w; e
- function getW(str, font) {0 V$ x: S- g2 E2 s
- let frc = Resources.getFontRenderContext();+ u+ m$ [2 H R1 V( g* B. i
- bounds = font.getStringBounds(str, frc);& L2 I9 x# T6 t3 a3 \) }" b. D
- return Math.ceil(bounds.getWidth());) V, V( ]% \$ O' E
- }* C* }. j+ m e" o+ V- d6 e
. p* {" f- e+ C1 I. l- d- da = (g) => {//底图绘制
$ G, n6 p% | ]7 l3 ^- s7 e - g.setColor(Color.BLACK);
" }' M8 I# @, v" [' q - g.fillRect(0, 0, 400, 400);5 |. N0 O4 W B0 ]4 q q0 L
- }- v' N0 ^* t% A3 i
- 4 b8 m. A8 P$ n$ C
- db = (g) => {//上层绘制2 h" C9 Y2 a1 C9 l- Z
- g.setColor(Color.WHITE);% C7 p4 r, D! k& e2 r* |0 U
- g.fillRect(0, 0, 400, 400);5 i6 \) L; w. i% ?' P u8 A
- g.setColor(Color.RED);$ s: w" q3 B, n, D6 V4 `$ D' L
- g.setFont(font0);
& k. `8 h6 O* a - let str = "晴纱是男娘";
+ m9 I( e' |2 P, |9 |" A3 | - let ww = 400;
+ V, k# d% H- J% K - let w = getW(str, font0);
2 c' ^* j4 @9 |, ^, Q+ V - g.drawString(str, ww / 2 - w / 2, 200);$ ^- r: J* y- W" L# p e) `
- }
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; \4 y. n+ [9 k6 ~% p" I4 y3 v4 @6 O- const mat = new Matrices();
. _% c5 s$ c Y# |) h* Z' i' i( T2 c - mat.translate(0, 0.5, 0);
! f- }+ ]" W' T
3 x' Y& [. J: [- function create(ctx, state, entity) {
: Q2 E7 e; x* E& ?0 q0 S8 s+ H - let info = {2 k! k1 x/ P- K1 Z. h2 Z1 k) L
- ctx: ctx,2 i ~! R2 ]2 q e& a
- isTrain: false,
6 a4 ]4 O9 {, f/ ~; G. z - matrices: [mat],3 L, X Q: X) U
- texture: [400, 400],
5 k3 M/ J+ L/ k$ C. V# l6 N - model: {) Y( c. d8 @/ U8 t* Q5 d' k# T$ @; _/ d
- renderType: "light",6 ^5 A8 Q- S/ l, k$ j& f
- size: [1, 1],
0 \: D% D, ~, _( o( ~ - uvSize: [1, 1]
/ [, k- @" m8 r: A3 S% ~ - }
; z2 @6 o. k/ y- ~ - }! h, z, j7 q( j* }
- let f = new Face(info);
: t# i$ d6 H0 M: h' x0 }& j4 O - state.f = f;: Z$ m1 h5 Y! G4 B j. B1 {5 H7 j
( g" W4 K5 x( ]3 M- let t = f.texture;
0 q8 x- e# [. h - let g = t.graphics;8 W6 I; D1 Q4 \; a# P
- state.running = true;
' i! ~- A# d3 i& C3 _, @ - let fps = 24;
' P$ J$ e V! U5 g# C4 X9 y8 s - da(g);//绘制底图. N: h, q" F& s# }4 s: d
- t.upload();+ d: N. K+ k; s9 j
- let k = 0;7 `4 a; U0 h6 ~$ _# `
- let ti = Date.now();
, ?9 ^3 [6 U5 q- `# ^$ f# _( ? - let rt = 0;
9 R+ [7 y0 s r! T - smooth = (k, v) => {// 平滑变化9 R9 a5 t9 r$ A7 F7 i
- if (v > k) return k;
; P/ z6 ^- u% |/ K* Q - if (k < 0) return 0;
* K1 J* G- C* ?! Q5 w: S - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 z/ [% ^2 @+ h - }
$ s1 t0 a( y9 h0 y$ {3 N - run = () => {// 新线程
# K( W3 s y. [* } - let id = Thread.currentThread().getId();
3 C+ q" Q% E5 m% b) W; C/ e9 g - print("Thread start:" + id);& C/ ?! g/ Y% u
- while (state.running) {( {+ M# W g2 n0 D
- try {( W' k) H: O2 N. _* ?0 W3 D
- k += (Date.now() - ti) / 1000 * 0.2;" ]" N- q/ k4 Q/ l, j
- ti = Date.now();
. d0 }; ]' x. @ - if (k > 1.5) {
% u" J7 M/ @ {% o( \ - k = 0;# L# {4 s6 R7 z2 x/ {$ W% B3 w
- }7 a! A6 j$ i: x [: V3 b; m4 m
- setComp(g, 1);
' J" T" b) R) H; Y q - da(g);
6 g+ b' m6 c' K - let kk = smooth(1, k);//平滑切换透明度
: j8 o& K2 a' A% d) K9 g ~: T - setComp(g, kk);
2 q) R0 y2 x! _0 o3 p - db(g);( x) ] U5 S& D% G p' D3 W
- t.upload();! a7 r- o1 ]) E& D5 v
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ H* k/ s% F! F" n
- ctx.setDebugInfo("k", k);. V. y1 z6 d0 T4 G( u
- ctx.setDebugInfo("sm", kk);
9 G( [3 r1 V- f5 r5 B. A - rt = Date.now() - ti;
: {. ~3 j* `% R1 D - Thread.sleep(ck(rt - 1000 / fps));
- ?- g* }* ]4 ~, a - ctx.setDebugInfo("error", 0)
: ^: w6 K* Y. r, {7 Z$ ~% b - } catch (e) {/ S2 p& a6 X. c1 x7 F( Z8 i" z
- ctx.setDebugInfo("error", e);
: D% Y1 F- C Z+ r o6 Z - }/ B. x! A" b& A5 |
- }7 Z3 Q% m) D/ j; @# I5 b# U, s
- print("Thread end:" + id);
( D" @- s) d+ k! o' O( h - }
7 f7 q/ W; L3 c$ M- J - let th = new Thread(run, "qiehuan");5 S/ E6 F2 C% S7 [
- th.start();
! j# _0 p3 u3 N9 h) I' J" o - }
2 x$ M3 g/ M/ `4 V9 @ i1 [' ~0 M8 u
" g8 Z0 {! ^! L8 @- function render(ctx, state, entity) {
: {6 s6 X8 o# G. p3 L8 [& A - state.f.tick();9 x- p% y8 u1 E% J1 q
- }$ P6 z. [0 \7 n! a5 w
- - X$ t" K' Z1 I0 r6 d
- function dispose(ctx, state, entity) {2 k5 \7 j2 p8 g6 |. t# s
- print("Dispose");% J8 [( P8 T7 d7 K6 z! y4 o
- state.running = false;# o* ]' V* P6 X/ `
- state.f.close();
0 ?) i" d# j) i - }- |3 [6 B5 o! M+ ~# m' x
8 i! P0 N- D. T7 E5 g* l3 O/ G- function setComp(g, value) {
+ U! Q- r4 j7 j+ J* b1 a - g.setComposite(AlphaComposite.SrcOver.derive(value));
( \1 G" }3 ]* B/ P, s - }
复制代码
! \6 e2 ]& o( J- m, u* |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。
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) C/ D" s+ g. B- b顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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