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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。: @- Z$ s: a- d' N
- importPackage (java.lang);
4 {3 C& V; d- [5 b6 k- y - importPackage (java.awt);
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' h. T2 d ]7 b( { J: f4 e8 j- include(Resources.id("mtrsteamloco:library/code/face.js"));6 A/ U- z. L9 C# k2 A
- ( ]) q: J: T7 F$ L: u
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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7 v0 ?9 F5 L# b9 E# o3 Q1 E8 {' h- function getW(str, font) {
, w+ g; u' M6 v& W - let frc = Resources.getFontRenderContext();0 n$ }8 d E- N! T
- bounds = font.getStringBounds(str, frc);3 r }; G' {' v0 d1 f4 k A% P2 I
- return Math.ceil(bounds.getWidth());
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- + O- x2 ]! w8 Y8 }% ?" d7 f- u
- da = (g) => {//底图绘制# r; l$ \! h% y, o* F5 D
- g.setColor(Color.BLACK);
. ^0 T& k7 f& S! A3 Z) `0 v+ Y7 Z - g.fillRect(0, 0, 400, 400);7 z1 ? b; \, c6 o: _: p
- }
4 W( G* ?2 G0 W% ?3 g
( X2 V- J7 ?+ w/ F- db = (g) => {//上层绘制
" N2 t" k$ [% d$ f4 g+ B - g.setColor(Color.WHITE);. n& `: k9 F( o4 c8 A9 F' w
- g.fillRect(0, 0, 400, 400);
/ c# F7 ]/ O5 y3 B - g.setColor(Color.RED);
3 L/ g+ \. V* p) l. e - g.setFont(font0);4 b5 x' T' `; R6 ^
- let str = "晴纱是男娘";
* Y! F% I- N# A - let ww = 400;) a9 ^! D H9 T d4 d) m
- let w = getW(str, font0);
5 u' c' I8 _, L2 @8 J8 v- ] - g.drawString(str, ww / 2 - w / 2, 200);/ i$ _; k. V9 c: V
- }
- I" F3 M6 N S7 _* }" o# j; W, ? - : k$ X2 F y# P# U2 U
- const mat = new Matrices();( Q* k1 ]9 C0 q
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {/ V, K; @7 G1 M7 ^, ? L; {
- let info = {1 \0 u# E% R* @* Q
- ctx: ctx,
& s& {) B$ a, X" _+ }9 i/ \" n: E - isTrain: false,
' i- F( P* ? N' H& f. k - matrices: [mat],
0 A- R: b K" x5 D6 j; M - texture: [400, 400],+ l3 M4 w# h+ t4 M3 e0 f
- model: {
4 l, U+ p$ c( t0 G% u6 S8 f c - renderType: "light",
' H$ g6 ~# R) B% z - size: [1, 1],' d+ {0 A$ y K0 y6 @& r
- uvSize: [1, 1]/ ^1 G* ] E9 k
- }) I4 J+ n: t. q$ z
- }6 z6 O. g' d! S7 H& O" Y5 F
- let f = new Face(info);
- l: J* `" S5 W& T - state.f = f; L [/ i; Z) {' X8 Q
- 4 c( a8 E# G7 q0 p( _6 N" S
- let t = f.texture;
; G2 g7 M, u% c - let g = t.graphics;1 ^( x/ P6 \! B0 t
- state.running = true;$ W7 y# G% y! w" j& N; L8 d$ c
- let fps = 24;
; E9 V0 _ a* x7 M2 B - da(g);//绘制底图9 G2 a1 g N$ o5 }) S
- t.upload();$ Z# I% R) K0 A3 O) |
- let k = 0;
! D6 R, u9 G: t - let ti = Date.now();
" K: B9 z$ o3 ]" v$ O* d3 K o0 S$ i - let rt = 0;7 l; D! Y% x: |7 D
- smooth = (k, v) => {// 平滑变化
- T/ u5 w) G3 g ` - if (v > k) return k;
6 t% h, Q8 ~. R: n, Z- p - if (k < 0) return 0;4 U% W+ {8 x- H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; v4 U3 F% Q9 @+ D
- }
9 F" L5 E9 S8 ~# Q - run = () => {// 新线程. y2 I8 |/ k; F# i
- let id = Thread.currentThread().getId();7 ]: D7 b" a" i
- print("Thread start:" + id);: O5 ?% `5 [. N# Y6 Q
- while (state.running) { m! g! o, |* |" P; H. E$ r4 H" c
- try {0 y. `, B' H8 {2 ?8 @5 w
- k += (Date.now() - ti) / 1000 * 0.2;
2 f* ^2 V* \" u; d9 V6 @ - ti = Date.now();/ Z m, }+ F+ }% C# d$ P/ w
- if (k > 1.5) {
R6 a9 Q! e& M! ^) Y8 k - k = 0;2 P4 C9 |6 F$ z" m: B
- }
4 | t/ Z; {+ f* D7 M, z1 W - setComp(g, 1);* p( g" N" X' k. I* Y# F
- da(g);; {' S. `' B" ? ^# d$ B1 w% q
- let kk = smooth(1, k);//平滑切换透明度) S5 U: M, ?/ R3 D1 Z% I: _' M
- setComp(g, kk);0 |5 j: T/ T1 f
- db(g);
3 {+ c" L* g9 C' y - t.upload();
; j, I6 o( g6 [3 e - ctx.setDebugInfo("rt" ,Date.now() - ti);4 U E' h* M5 s
- ctx.setDebugInfo("k", k);) n$ Z4 D3 _' o
- ctx.setDebugInfo("sm", kk); S4 u$ T# x, ]) M
- rt = Date.now() - ti;
" r7 z H2 X; [8 q) j2 q - Thread.sleep(ck(rt - 1000 / fps));' @' S! ~5 A* a3 c* h
- ctx.setDebugInfo("error", 0)0 Z d2 ]/ E! n: b/ v
- } catch (e) {
$ L, }& Z0 T$ T* Y! r - ctx.setDebugInfo("error", e);( @% G# ~ E6 p) `) g
- }
& I; W8 j2 M9 E6 _ - }
2 ?( a5 {9 b$ g1 Z% }+ C - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");* G4 s8 y1 E. m8 s: ^( ~% o
- th.start();
; D! f4 f* R. k# u& [2 N' `0 C - }
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0 ^2 T6 i/ B3 P$ B- function render(ctx, state, entity) {
# u {2 N; \+ c1 ]% e& Z/ L - state.f.tick();( t9 K+ y1 z# P1 k" x: t1 A+ k( x
- }0 o- ^7 C% h8 o4 H+ g
- ) E0 i6 I% A$ m3 v- m# @' N# Y0 R
- function dispose(ctx, state, entity) {2 x( h( h' O( ]3 e6 x
- print("Dispose");, i: U A: t6 @/ Y0 N! |
- state.running = false;* o& Z' u. D/ n( Y, b/ v
- state.f.close();9 N' u/ E8 o5 i: p( A
- }
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- function setComp(g, value) {
. I! Y; l8 x/ o- L- w/ r6 } - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 }6 s* p0 ?* g - }
复制代码
: F1 I/ V! ]; \7 K6 d3 @) r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)8 C# M& G. H5 T P _
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