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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。5 N# \3 w( u# o2 w5 r. \; y" W
- importPackage (java.lang);) e5 m j$ f; S6 q% B
- importPackage (java.awt);* w" b' C `, h" t3 e
]) K0 n0 u: Y# A- include(Resources.id("mtrsteamloco:library/code/face.js"));* x0 }6 f+ m y2 \& o- V7 P
& k% r& b0 Y( p- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 }" [2 b# t) }9 L8 }
- # o" N6 D, j, @$ v! w
- function getW(str, font) {! m5 Q2 @$ U6 o! w9 U: M
- let frc = Resources.getFontRenderContext();3 k3 P$ K: N8 n
- bounds = font.getStringBounds(str, frc);
$ F* I0 u) e; [! G: X7 g - return Math.ceil(bounds.getWidth());
# o! ^+ `' D" p/ ^ - }
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- da = (g) => {//底图绘制
4 ?* o9 O q% \* ~+ H4 t; `: E - g.setColor(Color.BLACK);$ S" W) E& Z% q3 J% t
- g.fillRect(0, 0, 400, 400);
" |/ }% n9 f$ O b6 @) _ - }
" k6 p9 Z! T6 b. h2 s. Q* b. \ - 3 R9 v9 a7 ?; i" r
- db = (g) => {//上层绘制
' J6 e2 p; F+ I& ~6 W6 w - g.setColor(Color.WHITE);1 z2 d# a* ?) d" Q- a& W
- g.fillRect(0, 0, 400, 400);6 g6 g) y( w) [8 P7 M8 |; e
- g.setColor(Color.RED);' ^! O5 J9 t# {3 Q1 n
- g.setFont(font0);
- I! I: f8 w9 v4 g9 ?1 i - let str = "晴纱是男娘";" k4 @5 O4 v6 r
- let ww = 400;1 ]9 ~" y3 ^/ f9 {0 }' H7 L, ^
- let w = getW(str, font0);2 W, b! l1 t- k0 h# V) {3 Q
- g.drawString(str, ww / 2 - w / 2, 200);
/ o% {* _/ |$ B. b* d - }
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/ E8 f( Y& I1 F; A& j5 w- const mat = new Matrices();4 ^! \1 w3 n, h2 g5 Q) N7 F8 b
- mat.translate(0, 0.5, 0);) Y9 ~$ i9 R8 H) R
- ! }! I( b! v& v1 I4 M
- function create(ctx, state, entity) {9 @: |$ I+ X, U6 t. d N' K! @" Y" v
- let info = {
$ d5 {9 a/ {$ h. l - ctx: ctx,
) U4 l {5 ?3 m8 d. U - isTrain: false,9 u. x7 S G- U3 d
- matrices: [mat],- ^1 L0 b* D" J3 v' n w
- texture: [400, 400],
! h/ p. ^4 a! D1 Z5 \% B - model: {
$ w: Y( C& C# F3 v - renderType: "light",: S# S `2 _6 l/ x: A
- size: [1, 1],
! R ]5 O* p8 ^ - uvSize: [1, 1]- \6 `* k A/ a+ b9 T- ]
- }4 q1 H" p. D0 y# T) ?
- }
2 k7 j/ \( }6 Q: r8 C; P - let f = new Face(info);( H3 ?2 }( N2 p$ l0 A/ J
- state.f = f;
% D! N8 M% k- Y7 |# X
Z8 u: z" o$ k. }( R8 U- let t = f.texture;: U/ n9 w. @* M; V. U [& |3 |
- let g = t.graphics;
2 z9 x* ^" \/ P ~) F - state.running = true;
7 I; k; C4 V3 X. Q3 j9 E+ { - let fps = 24;. C8 u2 M6 t, k
- da(g);//绘制底图
6 d" t; j: G% u, a; p - t.upload();! T3 R$ Z5 Q9 j& P! f7 X3 W
- let k = 0;
, N" x+ ~6 Z1 }' X1 X+ V& w - let ti = Date.now();
o/ ?, M' l! D& T ?$ c - let rt = 0;+ _! X; T6 X3 ?9 A: y3 y
- smooth = (k, v) => {// 平滑变化7 G' A* ^5 h+ R0 D1 G
- if (v > k) return k;
$ p! E* \3 F; g! g" m6 e6 Y( g/ u- Z - if (k < 0) return 0;/ P; }8 v! A2 h! y& h* H2 Q! @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 b( T. r' I: p/ ?2 o
- }
7 E" n3 h/ C* Q6 V- L - run = () => {// 新线程
6 {! J/ ?* e8 A/ r - let id = Thread.currentThread().getId();
" |- o2 E# x# R `9 K - print("Thread start:" + id);8 Z1 D1 i: H- l
- while (state.running) {
. k: H6 q3 }( t1 Q$ @ - try {' s. \8 @$ n; }, @
- k += (Date.now() - ti) / 1000 * 0.2;
: h( W! s2 [, ?# W( [& G" p - ti = Date.now();
$ l; q, j; C+ w9 ]9 D' } - if (k > 1.5) {8 E9 ?: X0 C# G) A) o
- k = 0;
0 a% [( ?" F% p. |2 i: _ - }
' v; l3 a: H2 P+ S4 \ - setComp(g, 1);; J7 Z& t5 n* \; R
- da(g);
7 t# d* y: i. B6 [6 K2 Y - let kk = smooth(1, k);//平滑切换透明度% I0 m9 H4 n# W8 H P% m
- setComp(g, kk);& Z: W( v- L2 E4 a( |) C
- db(g);0 a6 f5 S, C) C5 l
- t.upload();
: ?) i, N3 \9 ~! b0 v/ h+ U# J - ctx.setDebugInfo("rt" ,Date.now() - ti);
, z" N; h- r4 {" R! Z- O - ctx.setDebugInfo("k", k);
& j \/ b9 C- x5 e6 ] - ctx.setDebugInfo("sm", kk);' p- [3 X t0 O
- rt = Date.now() - ti;/ K8 w! R; J7 m& K8 B9 J4 h: O- q
- Thread.sleep(ck(rt - 1000 / fps)); b- \& A/ ^! g; U8 ^6 _4 d. v
- ctx.setDebugInfo("error", 0)4 q& e4 v# \3 L) s
- } catch (e) {
2 c5 _- n( h& m, u( ^) _9 d) L - ctx.setDebugInfo("error", e);
v. _& T8 ]* A% T1 {* w) ~ T - }
& w6 W1 ]+ P6 f [: J - }
; g% `; X+ A* i) }: \7 E/ | - print("Thread end:" + id);- W7 q k" f- J" C
- }
/ O+ [4 p4 y0 J& T3 }* k* y. b - let th = new Thread(run, "qiehuan");
& O; v& o/ q& |0 P1 x6 | - th.start();
4 } Z% k1 I6 q- o B+ e, C - }
9 G( T2 W3 i2 r5 v I% m: ^5 C - : Q" n1 o) ~2 U. v' Q0 }
- function render(ctx, state, entity) {& [. l% O6 V; F' F
- state.f.tick();2 q! p; W# e' W6 [2 L$ D( I7 @( F
- }
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- function dispose(ctx, state, entity) {) C% ]( @$ B1 I2 f+ L3 w8 a
- print("Dispose");9 n% ~. H' n8 V# V4 i7 \( t8 N
- state.running = false;
9 @) p4 d9 I/ { - state.f.close();
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- 6 C8 x# b' ~9 T4 i' ^3 O8 A$ v
- function setComp(g, value) {& `9 O7 f/ d# r
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" p' a) C& o' x - }
复制代码
3 p2 w- f" P6 L9 _0 Z1 ~! 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)6 f+ A. Q; O! M( J2 u5 e3 A4 r
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