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; Z# c" _' z7 P+ I( {3 q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。
P O; L @: u) r# \6 O9 T- importPackage (java.lang);
* l7 P' ?& k. D. p; g! Q- r0 Q - importPackage (java.awt);
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s" W* ^! d. {( z- ]3 H1 F- include(Resources.id("mtrsteamloco:library/code/face.js"));
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2 l3 @+ b9 }* w- {- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 C5 G$ n: o4 b/ |) R
$ c6 Z; Y; z p, M% I- u% E: z- function getW(str, font) {4 f" m' E% w/ N, @% a b& T
- let frc = Resources.getFontRenderContext();
' N3 [2 [" \7 ^, m4 A8 r! l - bounds = font.getStringBounds(str, frc);
. i* `/ g5 m' o - return Math.ceil(bounds.getWidth());2 a3 y1 |8 N) N3 L: f- a; X
- }
$ |+ ^3 {; S! D9 W! p, A) x; y5 c( y) m
3 R2 x6 J3 i, U9 B$ ?/ ]1 X- da = (g) => {//底图绘制2 O, o. N3 m3 |4 ?" Z' j5 m
- g.setColor(Color.BLACK);
- A1 }# ~' D; @ - g.fillRect(0, 0, 400, 400);3 n9 i+ m6 W" {; T1 B: h
- }5 L! k0 j* g! a+ {3 C% o: H
- * X' ^5 Q* p8 @5 J) n/ D
- db = (g) => {//上层绘制
4 O" M0 s% Y7 u- G5 n' ?2 y+ l- m - g.setColor(Color.WHITE);9 i- ^5 N0 J \1 K" r! H/ C8 N
- g.fillRect(0, 0, 400, 400);
1 \1 Q6 `0 |; P! U+ x# O) _5 a/ K - g.setColor(Color.RED);( c3 v* X9 K. J. x, R4 D
- g.setFont(font0);/ E( j1 W3 b! A# ~, a
- let str = "晴纱是男娘";
* f+ Y6 q1 O$ B# [; t - let ww = 400;
, i2 J7 x U+ T+ I/ I5 |7 { - let w = getW(str, font0);) `9 a% w5 i' b* Y" |1 B" `; G2 A
- g.drawString(str, ww / 2 - w / 2, 200);) N }7 w) W3 r y4 K
- }
+ L J1 G( Z0 N `: k7 d8 {
" c- A- F" S' r; B9 E; l) D& G+ m- const mat = new Matrices();
" v4 x$ F- `2 @% v4 ~" M( `5 F$ o - mat.translate(0, 0.5, 0);& ^3 Y* V' o1 T& V
- + t% v: ]0 y9 h' v3 C9 `( ~8 o6 \
- function create(ctx, state, entity) {) i4 `5 V c" v2 t' d/ R4 C
- let info = {
4 r% `; ]. J8 V6 X4 j: { - ctx: ctx,
; C' {/ a4 W7 I& k/ l+ m! x - isTrain: false,
3 }2 I1 g ~( P" o4 [# C1 o - matrices: [mat],
( l, b$ H! F2 r6 i+ x. x& j9 J - texture: [400, 400],
) {, u) s: x/ \( Z; I: x4 N' q - model: {
% S" ]' X Z% Q) m9 B/ O+ S4 D - renderType: "light",
3 g" U" v1 X/ K8 E; { - size: [1, 1],
# U- r3 H/ d, q+ I3 g/ M; ^% J - uvSize: [1, 1]
% p9 T! ~* h1 t( p2 r" } - }2 v$ j0 k: e& x% i9 l. k h5 o
- }6 l9 N6 |( X9 r- Y. Y7 y
- let f = new Face(info);
1 _# t+ g4 t: J0 ?# ^; {4 G/ y - state.f = f;1 i _+ L, G0 m$ \5 r
, J0 q# T& `/ ?6 E# w4 U8 }0 j% o9 [- let t = f.texture;
, [: N$ |* @- x7 ~* a - let g = t.graphics;
1 F+ E* {% J6 ?0 o/ C; R5 I; Y - state.running = true;
2 j; `0 Z1 l7 u8 {/ E: J- Z: H - let fps = 24;8 m: }- K/ P* B' `# s
- da(g);//绘制底图
! s; z: i; U- X: y( s' T - t.upload();! ?2 h$ i) {& @; M2 c
- let k = 0;
5 e% u4 }# D: }5 e# Z4 p - let ti = Date.now();
! {. g5 \. E/ X1 F - let rt = 0;2 s+ J* K) X0 A$ y6 m& I* g! _
- smooth = (k, v) => {// 平滑变化) |" E+ a- }9 T3 J9 N* S& A+ R z: u
- if (v > k) return k;
* [) V* }% b, z0 n - if (k < 0) return 0;5 y; f+ [5 V# j' ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. o* a3 q- g Z9 O) a
- }" V' I J6 `- ]4 d6 ?" @# C3 x5 l
- run = () => {// 新线程$ y8 S4 i% S' c1 D% f
- let id = Thread.currentThread().getId();- T# u: \- H& G! t
- print("Thread start:" + id);! ` _; t9 m/ T3 [4 @8 S; u$ y: ~9 b, R
- while (state.running) {9 U7 w5 k4 u+ j' t+ t% c H) |, b
- try {
9 ~2 Q% ~9 t' a- U, V/ j" I - k += (Date.now() - ti) / 1000 * 0.2;. U. _# l# V% y! ^, A9 B
- ti = Date.now();
! r% p4 v; k c: q0 `! ? - if (k > 1.5) {
4 @4 I/ a: o. I% }2 F9 D - k = 0;
: P9 W$ N6 D6 Z+ t* n ?8 | - }
0 H) q5 p- T9 I) h3 r) ~ - setComp(g, 1);, {, z2 N# b% k8 d) m
- da(g);$ m0 I( Q1 b* W& R. q: n8 n
- let kk = smooth(1, k);//平滑切换透明度
5 C0 q2 W8 v6 A# V2 y - setComp(g, kk);' Y# F, W+ H7 t5 e
- db(g);
; H2 Q1 D0 J5 e+ L7 m2 m - t.upload();' d1 J7 h$ {5 l. u1 U1 {8 p, {
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' e [4 q- d7 J9 W - ctx.setDebugInfo("k", k);
% Q/ }- y; K6 w - ctx.setDebugInfo("sm", kk);
7 q* ]7 l) V1 X+ u - rt = Date.now() - ti;% c3 {; }0 U+ A4 |
- Thread.sleep(ck(rt - 1000 / fps));
5 { _! o8 c: ?' p; s7 C - ctx.setDebugInfo("error", 0)
, z, \. O9 c1 M: h" R - } catch (e) {
8 K6 R' r% ]+ [9 U9 a - ctx.setDebugInfo("error", e);
* ?3 o; x1 C# L. Q7 a - }
' C E4 M* U8 r) I0 j- { - }& a+ `7 E1 q. c+ h6 O
- print("Thread end:" + id);6 b$ \( W/ Y. k& K2 e7 g
- }- M' A) N0 J" N3 F5 u" K l2 Y
- let th = new Thread(run, "qiehuan");, Q% V/ g+ D3 N/ ~+ u3 L% q
- th.start();
# J: s/ w+ B2 T- u0 c6 E4 P - }- J2 E- s* p& l7 I
3 C) m& w0 A D3 C* X6 R# x- function render(ctx, state, entity) {
Q3 x. P( D$ [ - state.f.tick();
3 U3 T' d7 @! t0 ^3 ] - }* B% v( ^" x* \! M; r3 E! }6 U; p
- ( u( |) }9 a6 V
- function dispose(ctx, state, entity) {
9 a* o0 ^$ ^ G+ `5 {- | - print("Dispose");
+ m8 g$ f+ y' g9 P - state.running = false;( X; a, E0 k/ w1 u8 s6 W0 Y' q! U V
- state.f.close();3 M) \( B# f5 T. f' m, r
- }# \/ U+ v3 C+ ~" z M
- ) L- e y5 S# z( V7 P
- function setComp(g, value) {8 f' d* `9 x/ e$ D+ y2 V
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; f5 [/ T- B1 v+ w3 f - }
复制代码 8 F% K0 ]$ r. r: z+ h
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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) J y, E! j2 N' z
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