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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。3 O: ^* [; Q6 k9 Y6 C6 c
- importPackage (java.lang);
3 M! \& G" p/ ^7 d5 E4 B - importPackage (java.awt);' ~/ _, D5 x" h8 i( R- y
2 \1 C/ O: M# w3 V) _2 T- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); z2 v1 i5 @4 C" b% |9 ?
( a2 z1 p) {+ [" V, \$ g( x- function getW(str, font) {
; M' Z* I" V' s2 S. b5 {( l$ n - let frc = Resources.getFontRenderContext();
0 {6 r0 w! m$ h8 O, S& W! t) A - bounds = font.getStringBounds(str, frc);+ _8 Y* J1 B6 Y. D0 a
- return Math.ceil(bounds.getWidth());" h2 J0 J9 A2 g( V
- }$ t: a% A' {3 J
5 Y; c( Z @0 k- da = (g) => {//底图绘制
- `5 T y& u7 H2 J - g.setColor(Color.BLACK);5 g9 R! Y( H; j3 R' H3 B, ?5 D2 {# [
- g.fillRect(0, 0, 400, 400);% y$ z6 n4 m% e O
- }
; @; i+ _9 b8 B1 j$ S. }' b
* u U( G/ z3 x, v f; c- db = (g) => {//上层绘制
" H6 m* b7 d1 e1 s* a. B - g.setColor(Color.WHITE);1 L5 z: U+ h% W- u# ]
- g.fillRect(0, 0, 400, 400);! i6 }' Q1 u( _" w6 n* N* w
- g.setColor(Color.RED);
1 u3 d, s+ U: p# v! m( y - g.setFont(font0);
+ F) k/ Q3 [& B: N0 { - let str = "晴纱是男娘";
3 }" I* U1 ]- H - let ww = 400;' O, p ^# d: ]# g* I
- let w = getW(str, font0);9 T5 |7 D% L$ W; L2 E( p
- g.drawString(str, ww / 2 - w / 2, 200);6 @6 E; n5 z' }( q0 u
- } q4 G' x+ {2 W$ I
- 2 S1 |& b4 z% f9 v0 X3 G7 h2 \
- const mat = new Matrices();
6 F7 ]! x8 ?6 H1 Y" z. } - mat.translate(0, 0.5, 0);
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2 ]& k8 @. s7 m+ p- function create(ctx, state, entity) {/ \, s: Y+ f2 T" w
- let info = {
& ^$ ~% \, M7 n8 N# A- P; v - ctx: ctx,+ [$ g$ j1 Z& R7 Z' G- ` Y
- isTrain: false,
" z: y( [3 m$ H( ?) k5 @( a; J - matrices: [mat],2 a- R0 B3 {( S) v& b
- texture: [400, 400],: {( Y) I* Q0 F3 j9 A2 [7 K, T) k+ g
- model: {
$ b1 s1 W$ k8 a' @0 L$ m9 J - renderType: "light",
8 T: x7 j* e6 W4 M: f# ^ - size: [1, 1],
+ v2 n0 ^5 }+ h- _$ z2 X+ {) s9 U5 z - uvSize: [1, 1]
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- }
0 e3 @6 a0 ?, T" c- H - let f = new Face(info);$ }& Y ?" T( t, @; z4 K+ E! p
- state.f = f;
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/ w' `5 {) ]6 i) f" P9 n- let t = f.texture;6 P. s7 r$ ]1 N6 `- L9 F. m
- let g = t.graphics;
7 h! R5 a# X# k- L3 W. F - state.running = true;
* S/ e7 H0 h! W# T% R& o! o1 s - let fps = 24;
3 z; l7 F( D1 W- u, d' |3 b - da(g);//绘制底图* b: q5 Z8 k# A o( o7 B( y, l/ Q
- t.upload();0 b/ V$ _& o6 e! x4 s
- let k = 0;: v8 R2 V+ i/ g& o& R3 C# ]
- let ti = Date.now();1 E9 ~) l( n% E3 ~
- let rt = 0;! Q; a( ~% {9 R( U) d
- smooth = (k, v) => {// 平滑变化
/ ?# z5 ~0 L" ?. N* H - if (v > k) return k;
2 c- p7 n/ ^1 Q7 t; u4 ~) | G/ y( j - if (k < 0) return 0;8 U* y! m2 l9 i" h! w, U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 l' ?) G' ~9 P, f5 W M$ w" c - }
/ ?; u" r! X# C& _1 x - run = () => {// 新线程
- [5 S( F. ^9 {" h# L" \ - let id = Thread.currentThread().getId();
, s5 Z' l- X9 |; v: ]) t - print("Thread start:" + id);$ ^* ^3 p, e/ N% @; |' [2 H
- while (state.running) {" H, W8 |9 s- B1 S- ?
- try {
1 M- ?9 ], x1 C+ e - k += (Date.now() - ti) / 1000 * 0.2;
( y/ o, o/ M& N+ X* _ - ti = Date.now();
! W" U. P$ x9 e% f - if (k > 1.5) {' }# a- j2 V ~- e
- k = 0;* f" C5 p0 y) W# e0 {1 M
- }3 j3 Z+ ?. W: e j5 r& r9 g
- setComp(g, 1);
3 S' ]9 x; E5 S - da(g);
. \3 ~$ p6 Z3 {" v - let kk = smooth(1, k);//平滑切换透明度
% C9 t7 V3 i3 d) V - setComp(g, kk);
$ C# ~1 u5 Z$ |( M* {( j! z, X - db(g);
1 U7 r, [" b1 U" X# i, D8 B) n& ] - t.upload();
. j7 j( p7 c/ w1 r" w1 X5 s8 @ - ctx.setDebugInfo("rt" ,Date.now() - ti);
1 K4 V! K6 B* V) ~3 i - ctx.setDebugInfo("k", k);% ~& ^5 ?/ B/ u3 H
- ctx.setDebugInfo("sm", kk);
1 C4 {, z: v- G; o' p' |3 V - rt = Date.now() - ti;
" g5 K9 ?* ~6 g0 Z" X, C/ M0 `: d4 ] - Thread.sleep(ck(rt - 1000 / fps));( S: Y, x$ r8 p8 I2 _
- ctx.setDebugInfo("error", 0)
' i; w$ D) a- O% V7 q - } catch (e) {
$ {- l/ A: f+ V0 n - ctx.setDebugInfo("error", e);( _" o) G4 @9 e% p q$ h+ c
- }/ ?! g% ?" B S a1 J" I
- }
2 A) {. X' [# r, w5 `) e - print("Thread end:" + id);
7 M! M% X. T" Y( r* ]2 v - }
, v% v- U( P( X J) M# c# W6 { - let th = new Thread(run, "qiehuan");+ T- J& w6 M7 r+ g
- th.start();8 [/ {% B& N' X% O+ K
- }
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- function render(ctx, state, entity) {
6 a" @# Y S% }" ^2 Q9 G - state.f.tick();
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- function dispose(ctx, state, entity) {
. t( A% W+ X B' C - print("Dispose");( Y5 I; x0 m, ?% t- }& ~2 d
- state.running = false;2 f$ K# \/ r! N5 |* j; ^
- state.f.close();
- ?3 j4 K% D | B1 h3 t - }) a$ m, u( a, u, G
, x, t3 p9 X3 F* N" X1 t9 d. h3 M% B- function setComp(g, value) {
0 A$ p" K3 N& W. G+ ~: k/ H - g.setComposite(AlphaComposite.SrcOver.derive(value));
# ~" M. O+ A) J9 O; u) m - }
复制代码
n3 Z/ T! `9 z( U8 A k& `0 T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。/ n6 F0 E& g* e3 s( T
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l* M& e/ G# n# }0 ^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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