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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。; V7 I& N8 D n+ q& H
- importPackage (java.lang);2 M6 y0 }: D' S1 J# V
- importPackage (java.awt);/ g7 E- ?+ ~% _4 H7 f/ [/ w8 w9 D
7 L* b* Q2 Y5 e; V+ r F9 v. U, x5 f- include(Resources.id("mtrsteamloco:library/code/face.js"));) e K7 v' v8 O- a- X
) t2 `3 D5 [' K, S$ Z, a- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" S0 w+ L+ H6 Z! R* y) n
4 H4 s. ]( ]% L) a3 q- function getW(str, font) {
9 K* j7 m7 C2 F# `7 T9 b o5 q - let frc = Resources.getFontRenderContext();( K$ U# G3 N* b+ _1 ~
- bounds = font.getStringBounds(str, frc);
4 I4 p- h$ R* ^# ], i/ ~3 |3 h' S7 m4 g - return Math.ceil(bounds.getWidth());
- l; ]$ F2 w1 p& E - }
6 a8 Q n( F. Q7 _
1 B0 n2 t% z% g- da = (g) => {//底图绘制7 G& h1 D( K8 p& O. E. r- \) F* a
- g.setColor(Color.BLACK);
, m( x# v7 H! z3 D+ U - g.fillRect(0, 0, 400, 400);2 e) Y. I- ?6 e3 V6 D
- }
+ {$ S: l8 a& j2 a- r+ s& [
1 i1 q( m, N% e, q! c) H$ ^4 t8 I4 B- db = (g) => {//上层绘制: v" m$ e4 W- m/ o
- g.setColor(Color.WHITE);4 @2 W# G9 p' P% G
- g.fillRect(0, 0, 400, 400);
8 h) G7 c' ?4 Q& N - g.setColor(Color.RED);
* |- {" b$ a1 V0 A( q - g.setFont(font0);
% I2 W! f% j, I# P) L( P4 \ - let str = "晴纱是男娘";
& Y" }+ s/ ~& u% h - let ww = 400;
l, R0 y) {" }* j; B3 C9 w - let w = getW(str, font0);# w' e# s A8 g
- g.drawString(str, ww / 2 - w / 2, 200); \$ U9 k: O3 [4 X
- }6 B8 ^( C) [! d2 @( k2 G3 G/ ~
- : U( V* U# T7 M/ N8 `7 @
- const mat = new Matrices();
% A4 x4 ~& R. V, v. Y) B - mat.translate(0, 0.5, 0);
# R- Q3 o! }$ _ - ' U( L7 _* _/ A0 {7 n
- function create(ctx, state, entity) {
# Y9 O. J* }, x0 S! Z - let info = { P2 r) y/ c# i8 x1 Y1 t4 {
- ctx: ctx,( O% O1 B$ F9 m. M
- isTrain: false,8 H" }' Y, L8 B) p7 x
- matrices: [mat],0 `8 V# B1 x# K/ T
- texture: [400, 400],- f1 W# M- J6 \2 V B7 ~) z5 l
- model: {
2 ?! @( D+ R9 c) i2 } - renderType: "light",4 N, b) g7 ]) c' O
- size: [1, 1],( L7 I) D5 T4 T0 P& y7 b. o" I/ V
- uvSize: [1, 1]9 ~$ `& {. Z( ^' y4 M
- }' w: q, J, l9 i. O' q1 @& [
- }7 v3 y t9 `2 [- P( q' q6 `+ ~# a
- let f = new Face(info);. D1 U/ H7 q0 J: }- A( ?
- state.f = f;2 {0 k; N9 P0 F- x
- - s' X' m/ C( ?* ^' ^
- let t = f.texture;
( h0 t F( Y/ b5 ^# h - let g = t.graphics;' R4 \8 b+ @, g1 m9 N9 _
- state.running = true;' b7 }" N5 w( F2 C' Q
- let fps = 24;/ W5 A! ^* `. G
- da(g);//绘制底图9 C% \# {( ^: F/ i; g" U$ a
- t.upload();
% T* U0 T& \2 p6 |- @( G# n2 K1 g# X - let k = 0;
* e$ h% T2 S% z$ { - let ti = Date.now();
9 Z+ [! [) ~1 O$ S1 g# y6 {( K6 u - let rt = 0;
) {" J1 T F& `9 ? - smooth = (k, v) => {// 平滑变化
- u( x9 j, I, }! n9 B4 F0 Z j - if (v > k) return k;
: M% \& A8 d/ F7 ^3 H0 A3 |* k, U - if (k < 0) return 0;$ \7 w* c4 c# C }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 S- r- w3 Q; t1 f$ J% a+ R6 {
- }: _6 U! J! z7 o6 J7 ]
- run = () => {// 新线程
' ~ }. a' |& `& T n - let id = Thread.currentThread().getId();9 x. i% V! X9 N
- print("Thread start:" + id);
& n5 ~; d9 @ X8 M0 j" ^ - while (state.running) {
9 v+ F# a7 S2 T! k$ d1 m4 [ - try {! @& ?7 w! `8 ?6 ]' U. m' P
- k += (Date.now() - ti) / 1000 * 0.2;5 K5 _: z6 }3 B
- ti = Date.now();2 D/ W5 m1 G p% C+ R6 S" H
- if (k > 1.5) {4 c* i3 P. E9 P: N1 a8 }5 Q
- k = 0;
# ?5 b: P! J7 v1 X - }
M1 `. w" ~2 f: h$ B - setComp(g, 1);
" R; n: W8 O& z. a - da(g);* Y+ ]% ~2 l, L* O, T8 Z" p
- let kk = smooth(1, k);//平滑切换透明度
. w9 J5 m4 b+ R& ?& I$ h- l" | - setComp(g, kk);
: N! H4 o; j+ Y! Y9 z - db(g);
1 ^/ L/ W" O2 ?! ?' Y - t.upload();# K7 S, U: r, j6 {4 }, I
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' h" U& g0 m1 [+ i - ctx.setDebugInfo("k", k);
- Y6 g, o: V/ V8 R0 I - ctx.setDebugInfo("sm", kk);
, ~4 G6 P& u/ \) I - rt = Date.now() - ti;
7 c4 F/ Y g$ w u, e. A t5 { - Thread.sleep(ck(rt - 1000 / fps));
2 P+ I t- g9 D* Q) A - ctx.setDebugInfo("error", 0)
6 U" @/ T* _& a6 j3 I1 s) V, S4 F - } catch (e) {: B! d4 H+ h2 Y5 y; x- C
- ctx.setDebugInfo("error", e);' P Y% w/ n3 K; r6 E9 s: ~, f
- }
4 o' t+ U) \3 j" `. [ - }5 t# i3 f6 ]* Z- [1 B- N/ B4 r
- print("Thread end:" + id);" q0 D# D% X/ C) Y
- }' {5 ~- n6 n- E8 ?! N
- let th = new Thread(run, "qiehuan");
$ `0 M2 g, S: h# M2 |8 d - th.start();! j3 e9 C- _+ D1 P7 X4 i
- }
) g; a) F9 H% h% c. m - + w1 j# r, }! ~. f; O1 ?
- function render(ctx, state, entity) {
$ @2 ?5 }6 h# d2 a" a" ` - state.f.tick();
* I: q5 r+ e# h) P/ e1 y$ I" z - }! t7 g7 \7 U) V) m7 T
" j* N3 i. u/ s T! i! g( w6 Q- function dispose(ctx, state, entity) {
' g- H2 k; B4 _4 g - print("Dispose");9 M* Y3 g+ }' T6 h$ I
- state.running = false;
/ E& S! P0 V8 E3 ^' R2 e5 J, [; H - state.f.close();
" D7 [9 d0 i9 A5 } W - }
" f( z2 X$ X2 h% i& _9 R4 b: J2 d% l - 4 J; |) s* m. Y. e9 L5 @7 I& X
- function setComp(g, value) {! R2 m7 x0 |, L- ~1 i7 J: i
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ R) y& t5 c8 E/ f - }
复制代码
3 D) Q# X# z& z- x" `2 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。: S0 R7 z, |5 |1 h* ]. {) \
; m5 z( o6 L3 k! `' P4 R# H, s
" N) Q9 J2 W) h! P6 M- g! r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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