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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。+ o$ u* E) z! m& v7 w
- importPackage (java.lang);, z0 U) H, J' n7 ?7 t5 j0 p
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));1 F, E& `$ g3 w3 b% M
- ( i4 \1 h& v8 N1 P( ~
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 ~ G$ B+ ^0 P
- ; h/ O, N. y4 Z2 a
- function getW(str, font) {
1 i8 _2 V# Q6 i( Q, ` - let frc = Resources.getFontRenderContext();
8 H: h0 b8 j/ U# `5 @+ g3 I3 D3 {0 c - bounds = font.getStringBounds(str, frc);
; x9 p! ^ m) P( |8 `0 E! u - return Math.ceil(bounds.getWidth());
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- 9 |) I! j0 E% u3 v" o: d) r
- da = (g) => {//底图绘制
; b/ T5 e1 s$ p4 O - g.setColor(Color.BLACK);
9 }; _. N! ^+ q4 `5 M+ O - g.fillRect(0, 0, 400, 400);; V! E; z" y% x x1 Z
- }1 u6 ?2 _4 u, [& U
- 0 X+ m) ~0 H( M# B1 ^) F- ^
- db = (g) => {//上层绘制, k7 h c1 f# y a! L0 a- H
- g.setColor(Color.WHITE);
# O J9 G: [. Y. g0 `0 o3 {2 @$ S2 T - g.fillRect(0, 0, 400, 400);* M0 |3 D% N: D8 z
- g.setColor(Color.RED);/ e# R" M3 D' n# v6 X
- g.setFont(font0);! U# s1 F9 x7 |% ^) O" c5 d6 A
- let str = "晴纱是男娘";1 c# F# }9 R9 \ G! @7 H0 M3 L2 T
- let ww = 400;
7 g, g' b: O G, e3 p - let w = getW(str, font0);- K; M& ?# u$ r/ P% }' E' e
- g.drawString(str, ww / 2 - w / 2, 200);. F4 y6 [5 e& ^5 I
- }- X$ T! @& c. o5 B: l
& y V% T$ T5 o4 u- const mat = new Matrices();* X/ q$ J: p& D+ K: {5 ~1 F
- mat.translate(0, 0.5, 0);
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5 n q& G+ h# e% O9 x5 n- function create(ctx, state, entity) {; j. ?4 i) s% h. j4 h: Z# ]6 [
- let info = {# X8 O. F9 ], b8 a) B/ [# k
- ctx: ctx,4 f: S- y( @1 e2 }2 c, r* H( K
- isTrain: false, A# z; p( k+ Y& M' n
- matrices: [mat],# f9 l/ _3 z0 o
- texture: [400, 400],; J' K* c' l/ @( J, B
- model: {3 e- b$ u& b9 ` T: e' I) j" S" z) v
- renderType: "light"," w% B/ n- E6 _8 f6 w
- size: [1, 1],
8 g- }3 v0 r; r* c - uvSize: [1, 1]
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- }
& \1 ]' D% ~/ _ F - let f = new Face(info);# N) j# y8 F8 g! W1 h
- state.f = f;. X, [+ ]# U' o7 X* j$ k
- 9 j' I' @# ]0 K7 s# x/ Q B
- let t = f.texture;5 {1 c3 W$ R$ H9 f o7 l
- let g = t.graphics; o d+ f6 _0 |) o. j3 p% f
- state.running = true;
2 H+ b t. X' }1 J: }- d - let fps = 24;
4 k: a; }" Y5 `5 W; D - da(g);//绘制底图
( M) I% m2 G$ X1 E8 f - t.upload();0 Y8 I3 v+ S, x0 u5 ?
- let k = 0;* J' l- q& }( z
- let ti = Date.now();
) a3 l3 J3 X7 B% W - let rt = 0;: i G1 T# j; O# g
- smooth = (k, v) => {// 平滑变化
! U" E4 V& L, [# r r! b - if (v > k) return k;
6 X9 P% C4 @6 w# I0 I+ _, j - if (k < 0) return 0;
. ^3 I7 M; `/ U& s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 x4 W5 C! s& T& x - }4 w- B: Y3 A" y: Q+ i+ J* C
- run = () => {// 新线程
* x- K7 f: T A5 q - let id = Thread.currentThread().getId();
8 V6 X4 w; ^& u K2 F - print("Thread start:" + id);3 y8 d& ^4 l: m/ X4 j- N) n. I" f
- while (state.running) {
0 `# Q" Q. g# \9 q! v - try {4 z6 t2 H, X8 [) ?! f; y6 m
- k += (Date.now() - ti) / 1000 * 0.2;
* ~) G1 O& H$ y: z0 J Q - ti = Date.now();, l; z. \4 a" e& p6 Q" m; W u
- if (k > 1.5) {/ V0 N! L/ h4 x& s Q0 d3 s
- k = 0;9 e6 Q: F! Z1 A! o( s
- }
/ g' A" F& R5 k3 |4 @2 s& C - setComp(g, 1);
- i- b) @% Z) z+ p - da(g);
1 f5 ~. r3 Y- U6 i$ M/ E! u- X - let kk = smooth(1, k);//平滑切换透明度+ n+ C" ^5 E; T- b4 u7 f
- setComp(g, kk);. }$ b1 `) y# w! l* ^
- db(g);
# \2 b2 C& L* Z5 a$ F8 \ - t.upload();8 K; U! v: T* z: f7 @! N# [8 K
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ s. C M' X9 @9 n# ?: K - ctx.setDebugInfo("k", k);9 U- ]/ C! p0 D! f, R4 g5 P0 I
- ctx.setDebugInfo("sm", kk);
. S2 h) i5 k( K) P- I - rt = Date.now() - ti;* m% E8 [# P; t! F' B
- Thread.sleep(ck(rt - 1000 / fps));
+ e6 n4 `6 v; l, j - ctx.setDebugInfo("error", 0) ] b; s5 C: O# x7 E
- } catch (e) {% C& E; |2 f! C- D% G
- ctx.setDebugInfo("error", e);5 h9 Z! a1 F7 Y9 m7 v7 M
- }8 P' O$ J, c; m- R4 d8 u" y
- }
0 P. _: w, j2 K; f d& _ - print("Thread end:" + id);
# }2 f1 A3 C8 r; I6 j - }$ L( G( z. g2 H! j5 }3 W
- let th = new Thread(run, "qiehuan");
3 y) r+ B; {* G" |0 p% \ - th.start();
|1 t! J5 F5 R' f$ h" |. m" G - }) [+ [0 f* a8 E# e+ [: \4 M
- ) l& {8 Z) R, w
- function render(ctx, state, entity) {0 L& t5 C: C! n0 @0 g+ E9 N
- state.f.tick();9 q( D, V3 n6 w. F
- }; q; G: \/ ?- k$ U! L
- / a5 L, c9 y' s3 m V
- function dispose(ctx, state, entity) {, R& _6 w8 `" z) Z2 G- h
- print("Dispose");6 H& K& t5 G) G
- state.running = false;' m1 e A: Z" b3 Q6 V3 `
- state.f.close();
& N: j( U7 ^. p# S - }
: q3 D2 R1 b- X" _9 Z/ i
" j: O$ `' C& B5 t- function setComp(g, value) {
' `5 S. l! S; J6 }9 v7 h - g.setComposite(AlphaComposite.SrcOver.derive(value));
# c+ K) R' @3 M - }
复制代码 : _3 X- u' J. u8 t" U9 i
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)
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