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& e$ r8 Q0 d& u0 t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。8 Y9 y4 A. @) T9 \
- importPackage (java.lang);# {$ K' R+ ?/ D& F
- importPackage (java.awt);4 U ^* m. o3 C' j
' k* W, f k, ?4 t; u- include(Resources.id("mtrsteamloco:library/code/face.js"));
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, m4 @# _$ y' U; H9 Y4 j- o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ s2 F( M" I f) r3 q
- # }7 B- H* b' h+ @
- function getW(str, font) {. Y% F* S4 F* N6 A- Y
- let frc = Resources.getFontRenderContext();
4 k0 Y& x. S6 g6 I* R) S - bounds = font.getStringBounds(str, frc);
3 E9 X! ?& `( ^6 s. ~% L/ X% R S - return Math.ceil(bounds.getWidth());
9 B% T) i' l+ A6 ?' N& C - }
; g' n l. a- o5 `$ T; P: J
. w+ S* [- S* a- da = (g) => {//底图绘制
6 B, o! W3 k3 d; {5 ?) i' ~: A! m% J3 c - g.setColor(Color.BLACK);
9 c* k& m! A! X# |: v8 ? - g.fillRect(0, 0, 400, 400);
7 y5 y( ]: K, h1 |6 Y3 C4 N# n - }) P* _9 j1 j6 q8 j+ e
- & o* J, a" {1 t: z( p8 [2 A3 K0 J( F
- db = (g) => {//上层绘制; W+ F# g' J# a# [% s9 s3 Y
- g.setColor(Color.WHITE);* h K8 h4 b F" Z5 F
- g.fillRect(0, 0, 400, 400);
( B9 \3 c/ ^2 e1 A# u - g.setColor(Color.RED);! _0 `+ a. k7 T( V
- g.setFont(font0);
& a9 j# O7 m9 E; n7 l - let str = "晴纱是男娘";
+ v+ @, c3 q# }1 U1 w0 N: x$ l$ [ - let ww = 400;
2 H% V- n& e; v0 z - let w = getW(str, font0);: G9 X0 o4 _' v) H, P+ C
- g.drawString(str, ww / 2 - w / 2, 200);
3 e( d) I# N$ I& E" s - }
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- const mat = new Matrices();
. X; D% k, B& g: L, I2 o0 n, T - mat.translate(0, 0.5, 0);
* B; ^ @: |" r+ w) U+ i, L M - $ `2 C. n8 B( L5 B/ F5 ^8 f% s! ~
- function create(ctx, state, entity) {
9 E* H1 n( c0 D% `/ r# d- r - let info = {
# A' a) |2 v! F2 a* I - ctx: ctx,0 r5 V% M% U% m- E" H
- isTrain: false,
# a q m& K* A - matrices: [mat],$ H4 H7 n) d+ q8 v+ P
- texture: [400, 400],
' a! i% w' |( d0 x* q* \ - model: {6 T8 a: O) a+ h* d; l9 L' f1 d" J
- renderType: "light",$ U& Z8 W* p" A) Q+ c4 T' {
- size: [1, 1],
( {& x- y6 W9 \6 s - uvSize: [1, 1]
# `$ r2 q* z# R - }: B9 @4 D* ]5 Q
- }
. z1 a. C4 L/ i! p; {! | - let f = new Face(info);
0 Q# g- ~+ t; O - state.f = f;
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* }# G/ g4 o D6 p2 r3 s0 G9 b: c- let t = f.texture;: {; z* X$ u6 Z+ [' B" R; J& N
- let g = t.graphics;1 d, i& K7 l/ P8 ]& A X( s0 I
- state.running = true;
, Y- i) P7 A3 q( k4 o/ [0 c" L, Z - let fps = 24;
3 L9 N0 B% [- c) q - da(g);//绘制底图
6 I* W! m* \0 a9 f; k; ?. A8 U - t.upload();
8 f$ t$ ]; L& L9 b! K7 a) e - let k = 0;0 y- @* u" P. T: [$ T
- let ti = Date.now(); G1 i& p: ?5 C0 S/ q
- let rt = 0;: J, z: e, S8 g
- smooth = (k, v) => {// 平滑变化* |) y! L7 ?2 R) W' O
- if (v > k) return k;1 Y3 H: i) P; a! _# t4 X
- if (k < 0) return 0;
* F ~ A3 T% m: G - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( w, T! q+ o0 b! u5 P
- }" u5 n z. u( k8 j% J* q5 _
- run = () => {// 新线程1 l/ s3 I- c2 J1 ?- ^% q5 _# O
- let id = Thread.currentThread().getId();& \2 D8 N0 Y+ T: B: Y' v
- print("Thread start:" + id);
! @* J3 _' q3 }+ `% p, H - while (state.running) {
( V3 u( C, c7 d1 T* Z - try {
# o6 m# _3 o* e0 ~0 D' l+ W - k += (Date.now() - ti) / 1000 * 0.2;! u' L& ^4 m' {9 \, W
- ti = Date.now();; \( r$ n2 }1 Z: T$ |( I# B3 @( O8 g
- if (k > 1.5) {
% ^2 s% v; l& N/ \/ n0 Q0 D* z - k = 0;: z. t5 P8 I8 e; ]' E- S4 a
- }
% t, L# M& |2 V; A4 j - setComp(g, 1);# R) O6 C$ h* @: K+ o4 F, `
- da(g);2 i$ e; _% d0 D1 v( ?4 p% X1 H& l
- let kk = smooth(1, k);//平滑切换透明度/ f* @- a( T# X' I$ B
- setComp(g, kk);% l. M% Z$ M& h' k0 o9 G& c& }
- db(g);8 g6 @) @( u. Y" A
- t.upload();+ L) w7 y/ _& r7 a8 j6 t; P2 I" W
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 n R0 o9 A8 z - ctx.setDebugInfo("k", k);4 H+ r1 t6 [1 h$ ] x
- ctx.setDebugInfo("sm", kk);
0 V8 G5 G' D) U" O& [ - rt = Date.now() - ti;4 R9 K7 _, R+ I, a- H8 U1 \
- Thread.sleep(ck(rt - 1000 / fps));
4 z2 t1 j( @1 J1 k( a l* a - ctx.setDebugInfo("error", 0)
3 V" B9 D& w, i - } catch (e) {; y; m: I$ b" S% K6 a( z% ~
- ctx.setDebugInfo("error", e);! S0 ^) }! J3 p* r
- }5 d( R% Z- p c& a% t4 a& M
- }
( E2 t6 N* j2 _! K9 K - print("Thread end:" + id);
& K9 ^& Q: I% q4 o: d! Y - }
( }) o5 O, f: R - let th = new Thread(run, "qiehuan");7 F L; P' f7 h" a
- th.start();4 F; z- B: Z4 l4 U2 l; {
- }
1 x* y% p* [+ }7 V/ @8 A P j: w - 3 ^# ]/ I z( w
- function render(ctx, state, entity) {, O/ n( I h% W6 i; {6 Y; S
- state.f.tick();
6 `! H% \. C2 E& t8 L [! F - }; d5 M1 L$ z" `' ?/ _
- 5 V0 L0 a# x/ o( m9 v
- function dispose(ctx, state, entity) {
3 w% i" C: Y+ m - print("Dispose");
$ @& D- y, G7 g. h- D" U - state.running = false;" {6 J$ Y+ }* W9 J/ B
- state.f.close();
$ `- n, Y4 {0 B - }
: y3 D# c/ @ Z% I
H1 u r' ~' h* X, \- function setComp(g, value) {
1 c$ m0 k# e0 o) L5 l - g.setComposite(AlphaComposite.SrcOver.derive(value));. R# a' m0 w5 N" f/ j: o" i7 r! a
- }
复制代码 : ~6 k4 P+ x+ I* Q
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。7 H" p. B' ?. N8 z8 [3 K8 V
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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)1 V* g. T$ Q3 P8 r
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