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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。( ~4 T" G* S3 q
- importPackage (java.lang);
" Z+ f+ [+ r+ x2 p+ V- s+ c - importPackage (java.awt);: \$ q$ }" t' h& E$ M( [0 t
9 C" k$ R) o- d- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); Y e6 N- S3 |8 f
( Q0 l N) @* x$ E6 h% z" G4 s+ A# t- function getW(str, font) {
9 y8 h0 P1 G) X }. d8 \& E - let frc = Resources.getFontRenderContext();! G5 r/ ~+ ]' W% |, H& a+ o
- bounds = font.getStringBounds(str, frc);2 |# L) L0 Q0 P) N2 g) ] ~' n
- return Math.ceil(bounds.getWidth());. ]7 `) Y3 P: y
- }) O1 |9 w- W9 w. ~: a/ p f/ M
- - l+ Y7 B+ a/ \ h
- da = (g) => {//底图绘制' n1 s- Z7 g# w9 C! U+ L* @7 t' a! v- Y
- g.setColor(Color.BLACK);
) c4 Z+ Y. Z" |# n7 A% J$ @) z% Z0 t - g.fillRect(0, 0, 400, 400);
) ] e3 Y- Q- f( j; X1 H% f - }) G# t* B$ \! N4 b$ E) x: N, b
- 8 n* U9 |! R f8 m) e
- db = (g) => {//上层绘制, O* J1 R: ?3 _* s0 [$ N8 H; i/ v
- g.setColor(Color.WHITE);; s8 ?5 }4 u$ d3 A6 A) ]
- g.fillRect(0, 0, 400, 400);- I& }$ ~2 v( D1 o9 t6 n5 V* D
- g.setColor(Color.RED);/ H% e" Y- d+ B
- g.setFont(font0);; ?7 r" n6 C+ b& S/ @0 ?7 n
- let str = "晴纱是男娘";* F7 m; K0 ], j8 Z8 E
- let ww = 400;; q3 ~+ O: l K4 U- L6 |
- let w = getW(str, font0);
' `6 q/ w1 V, H, y& r - g.drawString(str, ww / 2 - w / 2, 200);
' m7 h. O! c, a) d" w! ` - }6 |" {$ Z8 ?" n/ ^
- & ~7 P, z, `, ]: P% l* e
- const mat = new Matrices();
& V0 B4 A# v* k _* a6 H, u - mat.translate(0, 0.5, 0);! P6 G. t; g1 c
5 W8 w& p& D' d- function create(ctx, state, entity) {
+ x* j. B; [5 X5 E# F6 [. \' ^: R5 S& e - let info = {- X2 U7 [3 }0 w# f. m
- ctx: ctx,/ f: F; |3 ^. u R" L1 F# P
- isTrain: false,( X0 d2 E9 w2 H5 [. k8 G2 N" ^
- matrices: [mat],, H) N6 U. _# h! n' d
- texture: [400, 400],, z% l7 g$ R$ }# H( @
- model: {! V6 w$ q1 N' f4 i
- renderType: "light",
4 C! C1 s8 F! G1 w" } \ - size: [1, 1],
9 {0 B4 \ D2 T) L - uvSize: [1, 1]& T5 R' _* v2 p
- }
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- let f = new Face(info);. g3 O! U% o q- [8 ?
- state.f = f;# G8 x# b; `- w( R3 h o3 d
- 0 t4 x9 b3 {8 m M1 m Y! e& J
- let t = f.texture;
; {0 X- P0 c! f" Z4 n: M" e* x0 Z* c - let g = t.graphics;
! X& y" f( x9 _4 i4 `2 v - state.running = true;
) v- m! t( A- V8 v# M - let fps = 24;- n1 H# t0 B3 m7 |0 U/ k( S
- da(g);//绘制底图
$ A, F) Q5 t- Y2 o" ` - t.upload();! S K) M( r; B4 M1 T9 r q; q# J
- let k = 0;- N& U3 a- a2 i% i, p( W: g& i& H
- let ti = Date.now();
* I2 B+ Y' W; y: e; M" T - let rt = 0;
- M8 I- M5 Z7 p4 A3 @5 k1 w% D1 m7 O - smooth = (k, v) => {// 平滑变化3 ?- @2 N/ W5 c% \2 g$ Z' h
- if (v > k) return k;( y& T" w5 v" B' |; Y
- if (k < 0) return 0;' H4 q; o+ D& P1 o0 d) F3 q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; \8 }) L" o6 d3 r
- }
( a5 s) m+ ^: ~% c2 ] - run = () => {// 新线程
U- `" P) }7 a9 \ - let id = Thread.currentThread().getId();+ S2 T( |! W) o
- print("Thread start:" + id);
6 _3 V; @! J) t" B+ S! }" E0 W2 y1 @ - while (state.running) {
- ?8 ~0 d# I4 W. [8 E - try {" [) B. y9 C& R/ t, D
- k += (Date.now() - ti) / 1000 * 0.2;
9 u2 D$ R/ p; a: Q( F' l8 ~ - ti = Date.now();
% O, \5 n& _, E2 g - if (k > 1.5) {
/ u0 Z6 H, X+ _+ ] - k = 0;! }7 W* ~ ?" y5 p$ w- I
- } `/ t# O# h* D2 h* q
- setComp(g, 1);
* U' y4 W, D0 q! n - da(g);7 G1 \ z# P4 e) I4 a1 l
- let kk = smooth(1, k);//平滑切换透明度
) C$ A3 \, m0 e) G - setComp(g, kk);
: E& T& ?7 x$ {' F - db(g);2 a) T+ U* O* Q& i# K# P
- t.upload();$ r2 t: ~& x1 c4 v4 U3 }9 l5 z
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 C0 ?: i( j! U - ctx.setDebugInfo("k", k);, w! t1 {) |' ]9 j8 m
- ctx.setDebugInfo("sm", kk);' e% _" L t5 |* ~( c
- rt = Date.now() - ti;
5 O0 z; G5 j3 g4 f( e - Thread.sleep(ck(rt - 1000 / fps));. o% c8 s. [# `+ h) t1 R/ s
- ctx.setDebugInfo("error", 0)
. N: T: k! i/ B9 ]# [& X - } catch (e) {) _% J6 b: y) S' z/ l+ z1 D
- ctx.setDebugInfo("error", e);
" s) p! Z9 h' m* v - }: t$ K: i& I3 h+ N6 R! L
- }
2 c* D. P/ Y- q# A! X - print("Thread end:" + id);
5 k+ J3 J. y* e4 C. H" \" n - }
: O1 Y; ?1 W" c. H G' L a - let th = new Thread(run, "qiehuan");9 ^ X8 X2 F& P/ n9 g
- th.start();4 V% ?: S0 h9 L l
- }
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3 f- M8 o1 c1 O/ g# M- function render(ctx, state, entity) {8 ]/ v! R, b3 H. p/ ~9 F0 e
- state.f.tick();% G% w+ a3 P6 g2 J$ l
- }; F! Y7 V3 n+ G: u( q
* L$ \4 x L9 o) g- function dispose(ctx, state, entity) {
. L& u# q5 C" m* m/ o - print("Dispose");, x' p( B9 v( e
- state.running = false;
0 Y# P2 W$ B1 v- e0 L - state.f.close();
1 J0 a% Q2 P1 U$ C6 o - }
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/ E$ X' }" z& ?9 Y5 x- function setComp(g, value) {' \7 p3 g- b0 @1 A5 T8 q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; k1 V. S0 }- ^+ w$ |1 b7 } - }
复制代码
3 J0 p# L. e1 O2 A# p$ ~2 b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。
2 L) {* m( f/ \. K; X$ Z2 `2 q+ O6 A) \, Y7 `0 C
8 u$ m, x5 k3 F( ^# ^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 T- e$ }1 m
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