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idea4good authored 2020-02-02 23:19 . upload code
#define GUILITE_ON //Do not define this macro once more!!!
#include "GuiLite.h"
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define UI_WIDTH 240
#define UI_HEIGHT 320
#define CIRCLE_X 120
#define CIRCLE_Y 160
#define CIRCLE_BOLD 3
#define PI 3.1415926535
#define SMALL_RADIUS 35
#define BIG_RADIUS 50
static c_surface* s_surface;
static c_display* s_display;
// 3D engine
void multiply(int m, int n, int p, double* a, double* b, double* c)// a[m][n] * b[n][p] = c[m][p]
{
for (int i = 0; i < m; i++) {
for (int j = 0; j < p; j++) {
c[i * p + j] = 0;
for (int k = 0; k < n; k++) {
c[i * p + j] += a[i * n + k] * b[k * p + j];
}
}
}
}
void rotateX(double angle, double* point, double* output)// rotate matrix for X
{
static double rotation[3][3];
rotation[0][0] = 1;
rotation[1][1] = cos(angle);
rotation[1][2] = 0 - sin(angle);
rotation[2][1] = sin(angle);
rotation[2][2] = cos(angle);
multiply(3, 3, 1, (double*)rotation, point, output);
}
void rotateY(double angle, double* point, double* output)// rotate matrix for Y
{
static double rotation[3][3];
rotation[0][0] = cos(angle);
rotation[0][2] = sin(angle);
rotation[1][1] = 1;
rotation[2][0] = 0 - sin(angle);
rotation[2][2] = cos(angle);
multiply(3, 3, 1, (double*)rotation, point, output);
}
void projectOnXY(double* point, double* output, double zFactor = 1)
{
static double projection[2][3];//project on X/Y face
projection[0][0] = zFactor;//the raio of point.z and camera.z
projection[1][1] = zFactor;//the raio of point.z and camera.z
multiply(2, 3, 1, (double*)projection, point, output);
}
// Draw circle
int drawCircle(int x, int y, int r, unsigned int color, int arcAngle = 360, double* points = 0)
{
const double pi = PI / 180;
int tmpX, tmpY, lastX, lastY;
lastX = lastY = 0;
int sumDiffPoint = 0;
if (arcAngle != 360)
{
for (double angle = 0.5; angle < arcAngle; angle += 0.5)//Bigger circle, Smaller angle step
{
tmpX = r * cos(angle * pi);
tmpY = r * sin(angle * pi);
if (tmpX == lastX && tmpY == lastY)
{
continue;
}
lastX = tmpX;
lastY = tmpY;
s_surface->draw_pixel(x + tmpX, y + tmpY, color, Z_ORDER_LEVEL_0);
}
return 0;
}
for (double angle = 0.5; angle < 90; angle += 0.5)//Bigger circle, Smaller angle step
{
tmpX = r * cos(angle * pi);
tmpY = r * sin(angle * pi);
if (tmpX == lastX && tmpY == lastY)
{
continue;
}
lastX = tmpX;
lastY = tmpY;
if (points)
{
int index = sumDiffPoint * 3;
points[index++] = x + tmpX;
points[index++] = y + tmpY;
points[index++] = 0;
points[index++] = x - tmpX;
points[index++] = y + tmpY;
points[index++] = 0;
points[index++] = x + tmpX;
points[index++] = y - tmpY;
points[index++] = 0;
points[index++] = x - tmpX;
points[index++] = y - tmpY;
points[index++] = 0;
}
else
{
s_surface->draw_pixel(x + tmpX, y + tmpY, color, Z_ORDER_LEVEL_0);
s_surface->draw_pixel(x - tmpX, y + tmpY, color, Z_ORDER_LEVEL_0);
s_surface->draw_pixel(x + tmpX, y - tmpY, color, Z_ORDER_LEVEL_0);
s_surface->draw_pixel(x - tmpX, y - tmpY, color, Z_ORDER_LEVEL_0);
}
sumDiffPoint += 4;
}
return sumDiffPoint;
}
// Circle
class Circle
{
public:
Circle(int x, int y, int radius, unsigned int rgb, int bold, bool isRoateX = true)
{
this->radius = radius;
this->isRoateX = isRoateX;
this->rgb = rgb;
this->x = x;
this->y = y;
this->bold = bold;
curRadius = 0;
totalPixels = drawCircle(0, 0, radius, 0, 360, (double*)points);
}
void draw(int x, int y, bool isErase)
{
for (int i = 0; i < totalPixels; i++)
{
s_surface->draw_pixel(points2d[i][0] + x, points2d[i][1] + y, (isErase) ? 0 : rgb, Z_ORDER_LEVEL_0);
}
}
void rotate(double angle)
{
draw(x, y, true);//erase footprint
double rotateOut1[3][1];
for (int i = 0; i < totalPixels; i++)
{
isRoateX ? rotateX(angle, points[i], (double*)rotateOut1) : rotateY(angle, points[i], (double*)rotateOut1);
projectOnXY((double*)rotateOut1, (double*)points2d[i]);
}
draw(x, y, false);//refresh circle
}
void updateRadius(int step)
{
int newRadus = radius + step;
if (curRadius == newRadus)
{
return;
}
for (int i = 0; i < bold; i++)
{
int tmpRadius = (newRadus - i);
if (tmpRadius <= curRadius && tmpRadius > (curRadius - bold))
{
continue;
}
drawCircle(x, y, tmpRadius, rgb);
}
for (int i = 0; i < bold; i++)
{
int tmpRadius = (curRadius - i);
if (tmpRadius <= newRadus && tmpRadius > (newRadus - bold))
{
continue;
}
drawCircle(x, y, tmpRadius, 0);
}
curRadius = newRadus;
}
double points[364][3];
double points2d[364][2];
int radius, curRadius, bold;
int x, y, totalPixels;
unsigned int rgb;
bool isRoateX;
};
// Demo
Circle theSmallCircle(CIRCLE_X, CIRCLE_Y, SMALL_RADIUS, GL_RGB(25, 68, 97), 8);
Circle theBigCircle(CIRCLE_X, CIRCLE_Y, BIG_RADIUS, GL_RGB(59, 152, 215), 8, false);
void create_ui(void* phy_fb, int screen_width, int screen_height, int color_bytes, struct EXTERNAL_GFX_OP* gfx_op) {
c_display display(phy_fb, screen_width, screen_height, UI_WIDTH, UI_HEIGHT, color_bytes, 1, gfx_op);
s_display = &display;
s_surface = s_display->alloc_surface(Z_ORDER_LEVEL_0);
s_surface->set_active(true);
s_surface->fill_rect(0, 0, UI_WIDTH - 1, UI_HEIGHT - 1, 0, Z_ORDER_LEVEL_0);
double time = 0.0;
while (time < PI * 2)
{
drawCircle(CIRCLE_X, CIRCLE_Y, SMALL_RADIUS, GL_RGB(25, 68, 97), time * 180 / PI);
drawCircle(CIRCLE_X, CIRCLE_Y, BIG_RADIUS, GL_RGB(59, 152, 215), time * 180 / PI);
time += 0.2;
thread_sleep(40);
}
time = 0.0;
while(1) {
if (time >= PI * 4)
{
s_surface->fill_rect((CIRCLE_X - BIG_RADIUS), (CIRCLE_Y - BIG_RADIUS), (CIRCLE_X + BIG_RADIUS), (CIRCLE_Y + BIG_RADIUS), 0, Z_ORDER_LEVEL_0);
theSmallCircle.curRadius = 0;
theBigCircle.curRadius = 0;
time = 0;
}
else if(time >= PI * 3)
{
s_surface->fill_rect((CIRCLE_X - BIG_RADIUS), (CIRCLE_Y - BIG_RADIUS), (CIRCLE_X + BIG_RADIUS), (CIRCLE_Y + BIG_RADIUS), 0, Z_ORDER_LEVEL_0);
theSmallCircle.rotate(time);
theBigCircle.rotate(time);
}
else
{
theSmallCircle.updateRadius(3 * sin(time));
theBigCircle.updateRadius(3 * sin(time + PI));
}
time += 0.3;
thread_sleep(40);
}
}
//////////////////////// interface for all platform ////////////////////////
extern "C" void startHelloCircle(void* phy_fb, int width, int height, int color_bytes, struct EXTERNAL_GFX_OP* gfx_op) {
create_ui(phy_fb, width, height, color_bytes, gfx_op);
}
extern "C" void* getUiOfHelloCircle(int* width, int* height, bool force_update)
{
return s_display->get_updated_fb(width, height, force_update);
}

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GuiLiteSamples
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