基于stm32f4的三维旋转显示平台

Position;

_iq yPosition;

_iq zPosition;

};

//after you get the intersection points in 3d coordinate, you need to remap it into 2d coordinate on the very electrical plane,

//and the conversion is quite simple Coordinate_2D.yPosition = Coordinate_3D.zPosition; Coordinate_2D.xPosition = sqrt(xPosition^2+yPosition^2)

struct Coordinate_2D

{

char xPosition;

char yPosition;

};

struct Line

{

struct Coordinate_3D beginPoint;

struct Coordinate_3D endPoint;

unsigned char color;

};

//frame structure to store the visible points in one electrical frame

//need to be discussed

//here's the prototype of the Frame structure, and basically the frame struture should contain the visible points,

//and the zero points. As we have enclosed the number of zero points after each visible points in their own data structure,

//only the number of zero points at the beginning of the whole frame should be enclosed in the frame struture

struct Frame

{

int zerosBefore;

PointQueue_t visiblePointQueue;

};

//we need a union structure like color plane with bit fields to store the color imformation of every four FPGAs in one data segment

//actually, it's a kind of frustrateing thing that we had to rebind the data into such an odd form.

union ColorPalette

{

struct

{

unsigned char color1 : 4;

unsigned char color2 : 4;

unsigned char color3 : 4;

unsigned char color3 : 4;

}distributedColor;

unsigned short unionColor;

};

//and now we need a complete point structure to sotre all the imformation above

//here we add a weight field = yPosition*96 + xPosition, which will facilitate

//our sort and calculation of the zero points number between each visible point

//it's important to understand that, 4 corresponding points on the LED panel

//will share one visiblepoint data structure.(一块stm32负责4块16*16的LED，每块对应的点的4位颜色信息，拼成16位的数据段)

struct VisiblePoint

{

struct Coordinate_2D coord;

union Colorplane ColorPalette;

int weight;

int zerosAfter;

};

//as now you can see, we need some thing to store the visible points array

typedef struct QueueNode

{

struct VisiblePoint pointData;

struct QueueNode * nextNode;

}QueueNode_t, *QueueNode_ptr;

typedef struct

{

QueueNode_ptr front;

QueueNode_ptr rear;

}PointQueue_t;

//finally, we will have 16*16 words(16 bits)to write into the fifo after each electrial frame sync cmd.

//it may hard for us to decide the frame structure now, let's see how will the work flow of the algorithm be.

//firstly, the overall function will be like this

void Real3DExt(struct Line inputLines[], int lineNumber, struct Frame outputFrames[])

//then we need some real implementation function to calculate the intersection points

//with 0 = no intersection points, 1 = only have one intersection points, 2 = the input line coincides the given electrical plane

//2 need to be treated as an exception

//the range of the degree is 0-359

//it's important to mention that each intersection point we calculate, we need to

//remap its coordinate from a 32*32 field to x,y = 0-15, as each stm32 only have a 32*32

//effective field(those intersection points out of this range belong to other stm32), which can be decided by its address

int InterCal(struct Line inputLine, struct VisiblePoint * outputPoint, int degree)

//so we will need something like this in the Real3DExt function:

for (int j = 0; j < 360; j++)

{

for(int i = 0; i < lineNumber; i++ )

InterCal(struct Line inputLine, struct VisiblePoint outputPoint, int degree);

......

}

/******************************************/

//simple float format version of InterCal

/******************************************/

//calculate