comet moving through an elliptical trajectory.
4. After winning the prize, an animation is displayed.
After reading the functional requirements, let's see how to write the code:
First look at the simple initialization code:
Bool LotteryTurnTest: init () {if (! Layer: init () {return false;} auto bgSize = Director: getInstance ()-> getWinSize (); m_pBg = Sprite: create (LotteryTurn/bg_big.png ); m_pBg-> setPosition (Vec2 (bgSize. width/2, bgSize. hei
This article belongs to the HTML5 canvas painting series tutorial
In the canvas, you can easily draw a circle using the arc method. Originally, the circle can be regarded as an elliptic with equal width and height, but there is no elliptical method in the canvas, we need to simulate it using other methods.
First, we need to specify the parameters required to draw an elliptic. The basic geometric knowledge tells us that the elliptic requires the co
:.The above formula can be expressed as an implicit equation:Due to the symmetry of the elliptic, only the elliptical arc in the First quadrant can be considered. The formula for calculating the normal vectors of an elliptical arc is as follows:A point with a slope of-1 on an elliptical arc is divided into the upper and lower parts, as shown in Figure 2.3. In the
, a pointer, can be a turntable or a pointer, this article is a turntable.
2. When the turntable is turned, the speed is fast, slow, and then stopped.
3. When the turntable is being turned, various particle effects are animated, including the ring-like flashing stars and small comet moving through an elliptical trajectory.
4. After winning the prize, an animation is displayed.
After reading the functional requirements, let's see how to write the code
Four Methods for drawing an ellipse in HTML5 Canvas: html5canvasThis article mainly introduces four methods for drawing an ellipse in HTML5 Canvas. This article describes four methods, including parameter equation method, uniform compression method, cubic besell curve method, and grating method, for more information, see
Overview
Canvas in HTML5 does not directly provide the method for drawing an ellipse. The following is a summary of several painting methods. Various methods have advantages and
This article mainly introduces four methods for drawing an ellipse in HTML5Canvas. This article describes four methods, including parameter equation method, uniform compression method, cubic besell curve method, and grating method, for more information, see
Overview
Canvas in HTML5 does not directly provide the method for drawing an ellipse. The following is a summary of several painting methods. Various methods have advantages and disadvantages, which are selected as needed. The parameters of
.
* Get a circle or ellipse that fits into the rectangle specified by the x, Y, width, and height parameters.
* Ellipse Overlay area width + 1 pixels, height + 1 pixels.
/public abstract void DrawOval (int x, int y, int width, int height)
/**
* Fills the ellipse of the specified rectangular box with the current color.
*
/public abstract void Filloval (int x, int y, int width, int height)
You can also draw a circle in an elliptical way, and when
, pull out the radial gradient in Figure 5.
Figure 4
Figure 5
4, the choice of Dodge tools to slightly fill the light, the effect of the following figure.
Figure 6
5, create a new layer, with the elliptical marquee tool pull a positive circle selection, press CTRL + ALT + D feather 10 pixels, such as Figure 7, and then fill the color: #EDA14B, the effect as shown in Figure 8.
Figure 7/p>
Figure 8/p>
6. Create a new layer, use the
§4 Parabolic
1. Elliptical Paraboloid
(1) Standard equation
(2) Basic elements
* Vertex O (0,0,0)
* Spindle Z-axis
* Main plane Oyz plane: X=0;ozx plane: y=0
(3) When a=b, the elliptical parabolic surface is rotated by the parabola of the OZX plane around the z axis.
(4) intersection of planar and elliptic parabolic surfaces
* The intersection of planar and elliptic parabolic surfaces parallel to the z-axi
app.Case 4: Personal informationIf your app relies on personal information, such as age, gender, weight, marital status, etc., then collect and store this information on the Guide page. A step-by-step guide to the user's purpose is to give them a clear understanding of what you are showing and to make sure that the user can change their personal information at any time (usually on the settings page)Fitbit tells users about the importance of personal
3.1 Basic Bar chartLibrary (GGPLOT2)Library (Gcookbook)Pg_mean #这是用到的数据Group weight1 Ctrl 5.0322 Trt1 4.6613 Trt2 5.526Ggplot (Pg_mean, AES (X=group, Y=weight)) + Geom_bar (stat= "Identity")The x-axis is a continuous variable or a factor, and the graph is different, and the group here is the factor.STR (Pg_mean)' Data.frame ': 3 obs. of 2 variables:$ group:factor W/3 Levels "Ctrl", "Trt1",..: 1 2 3 #可以看出group是因子$ weight:num 5.03 4.66 5.53Set the fill color with fill, set the border color with co
intelligent machines and developed more advanced animated avatars, and through HealthKit,Fitbit, Jawbone, and Moves to get the activity data,as shown in 1.2 . Figure 1.2 Wokamon3.On Campusthe University of North Carolina has started using the student health application to cope with the high-birth-weight surge ( Freshman) problem. The app can create recipes for students and sync on HealthKit . It can also display menus in each area of the university's
, audio and video, or the most common activities on our devices, will certainly not be disturbed by irrelevant interface elements when you enjoy them.
Technical Level
As smartphones and tablets have penetrated into thousands of households, dominant operations are gradually decreasing. In the past, if the pop-up window didn't jump out of the screen, we worried that users would miss the operation. Now, we are more willing to let users explore this subtle interactive experience. In view of this,
the progress and milestones in the work are not related to the so-called rights consciousness. Instead, he points out, studies have shown that people who use a pedometer or Fitbit wrist to measure their daily walking distance are 30% more steps per day than those who do not use the equipment.This is no coincidence. He said: "To understand their own performance, so that their progress is recognized, can greatly mobilize a person's enthusiasm." "And th
in startups, like Square, Fitbit and Tapbots, and more companies are challenging the limits.
Design has become a key difference in the company's access to investment, media coverage and user focus.
I think it's time to give the market some shock. Let's add the designer to the co-founder group.
Find the best talent
5.1 Below these places can help you to find the outstanding design talented person
5.2 Designer Sacha Greif raised the po
Let's take a look at the map projection used by Google Maps.
Google Maps,Virtual EarthMap projection used by network geography is often calledWeb MercatorOrSpherical MercatorThe main difference between it and conventional mocato projection is thatSimulate the Earth as a sphere rather than an elliptical body. For more information about why projection is required, see liongg'sWhy map projection
Why is it a Circular Sphere instead of an
Central Earth space (Cartesian) coordinate system-defined as the origin O and the earth center coincidence, the Z axis points to the earth's Arctic, the X axis points to the intersection of the Greenwich Meridian and the Earth's equator, the Y axis perpendicular to the XOZ plane constitute the right hand coordinate system. The Cartesian coordinate system of the central Earth space is a type of coordinate system, which is used to describe the position of any point in measurement.
Earth-centric co
press the left mouse button to drag the control point for the first time, two control handles will appear on both sides of the control point. If you drag the mouse freely, the control handles will always take the control point as the symmetric point. When you release the mouse and adjust any one, the other will be locked. After adjusting the image, click the mouse again on the control point, and the adjusted control point is restored to the form when no adjustment is made.6. After adjusting the
to the point specified by X and Y). Cdc::lineto BOOL LineTo (int x, int y); BOOL LineTo (Point point);D Raws a line from the current position up to, but not including, the point specified by X and Y (or point). The line was drawn with the selected pen. The current position are set to X, Y or to point.------------------------Ellipse and Arc------------------------------------draw ellipse CDC:: Ellipse BOOL Ellipse (int x1, int y1, int x2, int y2); BOOL Ellipse (lpcrect lpRect);D raws an Ellipse
in Figure 3.
Figure 2
Figure 3
3, double-click the layer to bring up the layer style, parameter settings such as Figure 4, the effect is shown in Figure 5.
Figure 4
Figure 5
4, the "Main outline" layer selection, implementation: select > Modify > Shrink, the value is 30, as shown in Figure 6, press CTRL + ALT + D Feather 25 pixels, create a new layer fill color: #12A3E6, the effect is shown in Figure 8.
Figure 6
Figure 7
Figure 8
5, bring up the "body Contour" layer sele
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