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" ]- b9 d% t9 d- v9 ]5 V$ ]# }3 j7 t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。
, y+ \; ]7 i8 } c- importPackage (java.lang);
% r6 B$ H3 q+ ~ - importPackage (java.awt);: X+ a: M* L6 y3 ^: P- W
- 5 |$ c% p; z+ N# ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));+ f+ J0 s1 @( G! L
- U- x- g0 |% f' _9 d5 E
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. T, g4 V% A, f6 b& v
* h! t/ J: O3 M' T- function getW(str, font) {
2 v7 [4 G" {3 b: H6 k - let frc = Resources.getFontRenderContext();
/ I9 a1 K) y' k2 B - bounds = font.getStringBounds(str, frc);
8 F6 N- ~3 X" K - return Math.ceil(bounds.getWidth());5 F! e9 X1 y; V
- }
) P; J7 M6 e# \! ~6 ]
: q9 s/ m0 `- t: h0 y) @( x- da = (g) => {//底图绘制
/ e3 s6 l0 { Y - g.setColor(Color.BLACK);8 x$ z4 t$ a0 r7 Y6 m
- g.fillRect(0, 0, 400, 400);
& |! d% s" ?( E8 l$ H) b - }
/ F9 H8 g: s4 d& D% ] u8 F h
* n& ]! C+ T. U$ p- db = (g) => {//上层绘制
, ^0 X5 v* L0 P( [% w - g.setColor(Color.WHITE);
1 h, ~) G0 Q: f4 {+ a - g.fillRect(0, 0, 400, 400);# H, c# g P; Q. C8 V& X6 g" }) A
- g.setColor(Color.RED);
2 n9 u p; m9 V: \: }/ l4 u4 D - g.setFont(font0);9 p3 ?; H c, O+ x
- let str = "晴纱是男娘";; W6 o0 Z7 d1 A& a) d2 @
- let ww = 400;- U+ w8 W" _' R1 A
- let w = getW(str, font0);
, V: A s' j5 |+ t6 w+ W# @9 @ - g.drawString(str, ww / 2 - w / 2, 200);
2 Y: z- E9 O# y$ Y! @* A- u Y - }, I5 D) D) q$ n- E' k& k
, }$ E$ B+ u/ `* Q- const mat = new Matrices();( L5 O! {' ]% o8 @3 I& c# G
- mat.translate(0, 0.5, 0);/ I D- u% z% A* J$ k. i8 x7 h
- 3 [- p, R1 l! c0 W) e
- function create(ctx, state, entity) {) \, V S5 \8 q5 a! I- ^
- let info = {# [* ^) F1 ]* @9 J9 d
- ctx: ctx,
# R8 `' ]" p! I8 i - isTrain: false,2 P/ j, P6 T. h2 ~" T
- matrices: [mat],) ~ v# i0 R5 [( \
- texture: [400, 400],
, U" d% u4 t k( I6 T - model: {- i5 t$ p" W1 k) Y1 v9 T9 i, Y, g
- renderType: "light",
1 I' z4 u* P1 c( ?# b6 a - size: [1, 1],
! @+ ?! V2 {) M& U- y - uvSize: [1, 1]! v# ?( m9 P/ [
- }
% n) X% j$ D2 {# ?7 a5 Y5 N - }$ X0 B* c- ]% q" l
- let f = new Face(info);" e4 s" m3 v: p8 Q
- state.f = f;
( w0 _/ S0 X( X. R% j* q8 w - 7 Z* c! ~3 P3 ~; i `9 \+ S5 {
- let t = f.texture;
8 u" I+ ~* a" u2 Q - let g = t.graphics;$ e9 x! w, d# t9 A
- state.running = true;# D; o7 I2 |: w8 i: o
- let fps = 24;4 [4 e9 [; Z& K; l
- da(g);//绘制底图
6 ]3 l. i/ ^# G* c$ k8 V - t.upload();3 E6 B1 ]0 A* d$ i/ i" f- U) V
- let k = 0;
2 b! d* {6 j- O - let ti = Date.now();
& [8 u- c# X) B% ] - let rt = 0;
8 X* W2 Q( j( V5 R, _% D: R - smooth = (k, v) => {// 平滑变化
3 m5 Y0 ~6 k9 G; k. v1 W! F* H8 L - if (v > k) return k;
, d4 c7 V& n% A) v. S1 w: f - if (k < 0) return 0;5 A( ^1 T( @: F7 ^5 o& I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 J1 X3 w l9 [: y; \3 E2 o - }2 m e- W, P5 \9 ]
- run = () => {// 新线程8 p6 L2 O w" O. F' K. j$ b: G4 m, m; K
- let id = Thread.currentThread().getId();0 E- \5 E0 s3 r2 d7 x5 @
- print("Thread start:" + id);" k! F8 l+ ?, I8 k5 ?# l
- while (state.running) {: J L' w! t3 l+ T
- try {
2 }) m6 K( g' u - k += (Date.now() - ti) / 1000 * 0.2;
% Z$ f& ]; p! V7 o* d - ti = Date.now();* H4 T# h' E f3 K5 X( R+ x2 s
- if (k > 1.5) {
) s4 J) a/ n% l* T6 t - k = 0;
+ d$ i- i+ |+ }! A. v: o4 x" j - }7 a" v9 t; s7 m+ x8 G( H
- setComp(g, 1);
8 q P6 J7 i( u+ r7 n' E& N - da(g);% m9 T# ]" r R! D7 @7 n
- let kk = smooth(1, k);//平滑切换透明度
" u6 B" A# N1 I9 n& [% A - setComp(g, kk);
3 G Z C# T0 y - db(g);
1 s6 h0 J7 X D) q - t.upload();( u! |" |( Y2 r% l9 m4 Y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 C/ e9 \3 k. Y' z4 R) P - ctx.setDebugInfo("k", k);
, c; a5 v0 z! E/ n - ctx.setDebugInfo("sm", kk);
+ s- ?( [; X: [% @: R - rt = Date.now() - ti;. J( k: y5 p- V7 k7 x5 B& W
- Thread.sleep(ck(rt - 1000 / fps));
# R$ v; g9 {, `8 t6 c - ctx.setDebugInfo("error", 0)
0 z. I# W) K8 O/ h: Q9 q- i - } catch (e) {
+ O s$ y7 p n1 q- S+ F+ e, h - ctx.setDebugInfo("error", e);. }1 O7 n T' @( ^" F
- }
9 c+ F* w& {3 G* _ - }
. U8 [# B! S0 @1 L) Q" h, a( V - print("Thread end:" + id);" J" y. G+ E: \4 L
- }% \5 o- w: {* |0 u
- let th = new Thread(run, "qiehuan");' E+ {7 S( C! Q3 C' e" z
- th.start();% X" ~- F$ @$ l! e9 A% M# t5 ?
- }
/ N* v( ^# \, X9 T; v1 e' V) t
! @6 | C2 h. l' j, J+ g: d- function render(ctx, state, entity) {; H, t4 d3 u5 X
- state.f.tick();& ?# I* p) y9 X$ ?# o7 }# ~
- }
9 M( ^" |' n4 k. f# M; ~" W; x8 d0 A+ w - * ^/ j' p% ~2 d6 G
- function dispose(ctx, state, entity) {
( Z u3 K+ W( x v1 o" ] - print("Dispose");
- ^3 g% F( i# U; B. h6 F, r - state.running = false;9 v) u5 |( K$ S
- state.f.close();
0 p9 V( [% Z7 q( G0 [7 [6 L - } G0 }* t6 [) s. X7 o' F2 j
: T1 o9 R2 w8 H0 C6 Y" a6 M- function setComp(g, value) {
s$ x0 `2 n# ]( j, R1 y - g.setComposite(AlphaComposite.SrcOver.derive(value));" J1 R# e$ Y+ m& z7 C
- }
复制代码 & |$ h# |, n1 M% @
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。+ h; v+ R ]* i
2 R n# G# ` }5 _, h0 F3 c4 e) L. ?/ ~9 i4 z; t
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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