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) A3 ^/ g7 j& ^! f8 N6 }% A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。
; ?! k% h' t* P2 s( s5 [# t- importPackage (java.lang);) N( j7 N" D" a
- importPackage (java.awt);$ v$ A/ y3 ?9 w* u- _) J
7 Z, g% f* Q9 b# C& w9 ^- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {; V& @* b( u* j9 Y& Z+ I
- let frc = Resources.getFontRenderContext();1 n6 `8 `' d2 ?3 u& a Y
- bounds = font.getStringBounds(str, frc);/ h* V5 N) s! ^* y0 S- ]
- return Math.ceil(bounds.getWidth());- F1 d! T+ X: V' A/ g
- }
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- da = (g) => {//底图绘制6 D- @( l; l3 R6 I
- g.setColor(Color.BLACK);
3 u4 K& Y$ M5 B% l3 m7 k - g.fillRect(0, 0, 400, 400);
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- 9 O: S* G! c) |! R7 F* \% H* B: W
- db = (g) => {//上层绘制
' @" E$ {% U7 |7 N0 ^ - g.setColor(Color.WHITE);% m& {) R( ~; h+ H
- g.fillRect(0, 0, 400, 400);
c) q9 x6 k2 O - g.setColor(Color.RED);+ f! V6 `: t" h( A1 M) u5 {
- g.setFont(font0);( { I h0 H7 o5 _3 Z9 I5 E/ m* [
- let str = "晴纱是男娘";3 x) h+ n! v6 I/ S% E' Y( Z
- let ww = 400;# [" E' P1 C- l( f
- let w = getW(str, font0);% J# E5 R; C1 `, `
- g.drawString(str, ww / 2 - w / 2, 200);7 A2 |% Y0 E' [- z2 g9 I
- }
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- const mat = new Matrices();
' ?5 s3 h" ]/ u- j3 a1 s9 P+ Q; | - mat.translate(0, 0.5, 0);% F {$ c5 o/ [, Q- t$ {% `
- 4 s' ^, P# V) `' {0 H
- function create(ctx, state, entity) {! J9 T2 p% W: Z" T6 [9 q. T
- let info = {
+ S+ U! L- {: e4 y. ] - ctx: ctx,
; m) D3 e3 o; w% A2 d" O! Y+ I$ O - isTrain: false," n& a4 G# t. s6 b9 ` N
- matrices: [mat],
1 G$ T0 X8 n0 P/ e - texture: [400, 400],! q5 q5 B: w, t: |/ x0 Z) A
- model: {
# K; D. K6 F9 M+ {2 m% m3 f - renderType: "light",
' ~! G- z6 `7 y% y6 @+ v- J/ F I - size: [1, 1],
( x5 d- @. B. i1 e - uvSize: [1, 1]' q% N3 O3 ~3 C1 C7 y' j. d) A
- }
+ x! H0 d, N0 p! A2 R - }
2 ?; Q! `8 z6 `% u* |: g9 }" _ - let f = new Face(info);* F% ^! l. Y* `
- state.f = f;
- O3 @: i5 n% t) H$ `8 n+ h
8 Q* x+ o; a3 [- let t = f.texture;
. L1 B. I7 q8 r7 U7 m2 _+ i - let g = t.graphics;$ Z& t+ s: a+ Z" L1 K* P
- state.running = true;
3 L; F3 H+ @9 H% W& B6 f - let fps = 24;; {1 O" O' \8 z, u' a: T/ K' G5 w
- da(g);//绘制底图
7 r! n5 ~7 s; a( I - t.upload();
* J& b& }# }8 y* D8 N) ` - let k = 0;: J4 I) |& ^5 P; }8 f/ Y1 V* ]1 [
- let ti = Date.now();
0 t/ z8 o1 C5 ?8 Q# t/ F1 o& M" e - let rt = 0;
, `) p% D0 W1 {9 c1 f4 K& i - smooth = (k, v) => {// 平滑变化+ k- \, q$ a' }0 P5 j" Z
- if (v > k) return k;
$ E) G r0 S7 T8 S4 v% v8 \ - if (k < 0) return 0;5 g) Q1 n0 A0 a" H- X( V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 J) N7 Y$ f. {. [) q
- }
& O9 O4 ?( W1 u3 O( u2 c, } - run = () => {// 新线程# ?& J7 `7 l' U5 O9 e0 _) D
- let id = Thread.currentThread().getId();
: d; ~( k8 [! w/ } - print("Thread start:" + id);
! |; L% b! X' _7 X - while (state.running) {7 u5 T$ r0 g$ |" j& Y2 v1 `
- try {* B. C. ^5 U: d
- k += (Date.now() - ti) / 1000 * 0.2;" m. C' v# Q" X7 U8 t% i
- ti = Date.now();( q# @) R$ _" p* [; i
- if (k > 1.5) {
" S/ W! D% P: }9 p/ n - k = 0;
8 c5 F4 I9 D5 j5 U& ` - }
! y; V" j4 C& ?$ Z - setComp(g, 1);1 C) h& c6 I: B& `2 i( n. y* ^* I
- da(g);$ t$ p8 T4 d8 |: k) l
- let kk = smooth(1, k);//平滑切换透明度
9 O' [' T/ w' X1 p - setComp(g, kk);
2 o' ~1 Y1 I& B0 k - db(g);4 d" X7 W- g3 j2 m$ L4 z) @+ U
- t.upload();' c$ w4 F% y4 R
- ctx.setDebugInfo("rt" ,Date.now() - ti);
X, K0 I+ C9 ^) t' P+ l0 J - ctx.setDebugInfo("k", k);
5 u, Y. Z, z k2 A1 G - ctx.setDebugInfo("sm", kk);
2 G! [7 e# e/ @- i$ Y4 z7 A - rt = Date.now() - ti;0 F3 L% x" @( @0 s: N. `
- Thread.sleep(ck(rt - 1000 / fps));
+ R- ]. ^5 w9 g& B - ctx.setDebugInfo("error", 0)
, `" o/ f ~# ?2 w) ] - } catch (e) {: Y0 l" S' O' {' u
- ctx.setDebugInfo("error", e);- A2 n6 O# n/ F1 M
- }
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- print("Thread end:" + id);
+ s% n/ n2 b5 b - }
/ y5 U3 n4 u- d# M7 o- ?* g( E% c - let th = new Thread(run, "qiehuan");, x5 F7 |: O, D4 F8 n- r& ]; Y
- th.start();
' w1 @9 X0 ]5 x3 R& n2 m4 K% t - }
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9 a" y7 ~; ^: U) q X- function render(ctx, state, entity) {# N' e! n# j' t* x1 {' @: ^( x% J# b
- state.f.tick();
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$ }! ]8 G+ N8 V& f2 F4 h- function dispose(ctx, state, entity) {# ~! c' J+ q" ]& G6 Q5 N" D
- print("Dispose");
$ r: j: U5 l: L1 X. U6 |6 z - state.running = false;; q1 F4 B& w3 `% Y6 w4 R' X0 w# U$ l
- state.f.close();
" B8 S; U5 f% L- x - }
* ^6 ?0 d. G5 s2 w0 W! E3 h# {
# I, ~5 i2 |* S0 q& C, W% R- function setComp(g, value) {& c* y1 o& @% v$ M1 Y: N
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* N3 A* E3 a6 E; ?! f. ` - }
复制代码 1 q! R1 B3 a r; _1 f7 U: d0 A
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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1 l4 t4 A7 T, r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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