void MI0283QT9::drawCircle(uint16_t x0, uint16_t y0, uint16_t radius, uint16_t color)
{
int16_t err, x, y;
err = -radius;
x = radius;
y = 0;
setArea(0, 0, lcd_width-1, lcd_height-1);
while(x >= y)
{
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 - x, y0 + y, color);
drawPixel(x0 + x, y0 - y, color);
drawPixel(x0 - x, y0 - y, color);
drawPixel(x0 + y, y0 + x, color);
drawPixel(x0 - y, y0 + x, color);
drawPixel(x0 + y, y0 - x, color);
drawPixel(x0 - y, y0 - x, color);
err += y;
y++;
err += y;
if(err >= 0)
{
x--;
err -= x;
err -= x;
}
}
return;
}
void Button::draw(SDL_Surface* s){
if ((hovered&&!leftDown)||(leftDown&&!hovered)) SDL_FillRect(s,NULL,(foreColour.r<<16)|(foreColour.g<<8)|foreColour.b);
else if ((leftDown&&hovered)||(!leftDown&&!hovered))SDL_FillRect(s,NULL,(backColour.r<<16)|(backColour.g<<8)|backColour.b);
SDL_Color darkborder = {0,0,0,0}, lightborder = {170,170,170,255};
if(hovered&&leftDown){
SDL_Color temp(darkborder);
darkborder = lightborder;
lightborder = temp;
}
//draw a border _bBT thick.
for(int top = 0; top < _bBT; top++) for(int p = top; p <width-top; p++)
drawPixel(s,p,top,lightborder);
for(int bottom = 0; bottom < _bBT; bottom++) for(int p = bottom; p <width-bottom; p++)
drawPixel(s,p,height-bottom-1,darkborder);
for(int left = 0; left < _bBT; left++) for(int p = left; p <height-left; p++)
drawPixel(s,left,p,lightborder);
for(int right = 0; right < _bBT; right++) for(int p = right; p <height-right; p++)
drawPixel(s,width-right-1,p,darkborder);
//draw focus box if focused.
if(focused){
for(int p = _bBT+1; p <width-_bBT-1; p+=2) drawPixel(s,p,_bBT+2,0,0,0);
for(int p = _bBT+1; p <width-_bBT-1; p+=2) drawPixel(s,p,height-_bBT-2,0,0,0);
for(int p = _bBT+1; p <height-_bBT-1; p+=2) drawPixel(s,_bBT+2,p,0,0,0);
for(int p = _bBT+1; p <height-_bBT-1; p+=2) drawPixel(s,width-_bBT-2,p,darkborder);
}
//draw text
drawText(text,width/2,height/2,font,s,textColour.r,textColour.g,
textColour.b,Centered);
}
void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0,
int16_t r, uint8_t cornername, uint16_t color) {
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
while (x<y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
if (cornername & 0x4) {
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 + y, y0 + x, color);
}
if (cornername & 0x2) {
drawPixel(x0 + x, y0 - y, color);
drawPixel(x0 + y, y0 - x, color);
}
if (cornername & 0x8) {
drawPixel(x0 - y, y0 + x, color);
drawPixel(x0 - x, y0 + y, color);
}
if (cornername & 0x1) {
drawPixel(x0 - y, y0 - x, color);
drawPixel(x0 - x, y0 - y, color);
}
}
}
// from https://web.archive.org/web/20120225095359/http://homepage.smc.edu/kennedy_john/belipse.pdf
void SmartMatrix::drawEllipse(int16_t x0, int16_t y0, uint16_t radiusX, uint16_t radiusY, const rgb24& color) {
int16_t twoASquare = 2 * radiusX * radiusX;
int16_t twoBSquare = 2 * radiusY * radiusY;
int16_t x = radiusX;
int16_t y = 0;
int16_t changeX = radiusY * radiusY * (1 - (2 * radiusX));
int16_t changeY = radiusX * radiusX;
int16_t ellipseError = 0;
int16_t stoppingX = twoBSquare * radiusX;
int16_t stoppingY = 0;
while (stoppingX >= stoppingY) { // first set of points, y' > -1
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 - x, y0 + y, color);
drawPixel(x0 - x, y0 - y, color);
drawPixel(x0 + x, y0 - y, color);
y++;
stoppingY += twoASquare;
ellipseError += changeY;
changeY += twoASquare;
if (((2 * ellipseError) + changeX) > 0) {
x--;
stoppingX -= twoBSquare;
ellipseError += changeX;
changeX += twoBSquare;
}
}
// first point set is done, start the second set of points
x = 0;
y = radiusY;
changeX = radiusY * radiusY;
changeY = radiusX * radiusX * (1 - 2 * radiusY);
ellipseError = 0;
stoppingX = 0;
stoppingY = twoASquare * radiusY;
while (stoppingX <= stoppingY) { // second set of points, y' < -1
drawPixel(x0 + x, y0 + y, color);
drawPixel(x0 - x, y0 + y, color);
drawPixel(x0 - x, y0 - y, color);
drawPixel(x0 + x, y0 - y, color);
x++;
stoppingX += twoBSquare;
ellipseError += changeX;
changeX += twoBSquare;
if (((2 * ellipseError) + changeY) > 0) {
y--;
stoppingY -= twoASquare;
ellipseError += changeY;
changeY += twoASquare;
}
}
}
int Graph::bresenham(Point pt1, Point pt2, float r, float g, float b ){
Point p1 = pt1;
Point p2 = pt2;
int x, y, x_end, y_end, p;
int dx = (p2.x - p1.x), dy = (p2.y - p1.y); //for determining sign of slope
bool steep = false;
float m = (float)dy/(float)dx ; //find the slope first
//DPRINT("The slope is %.2f,\tline with color %.2f,%.2f,%.2f\n", m, r,g,b);
bool positive_slope;
if( m >= 0 ) // positive slope
positive_slope = true;
else
positive_slope = false;
if( fabs(m) <= 1 ){ //shallow
steep = false;
}
else{ //steep
steep = true;
swapXY(&p1);
swapXY(&p2);
}
determineStartAndEndPoints(p1, p2, &x, &y, &x_end, &y_end);
//DPRINT("x: %d,\ty: %d,\tx_end: %d,\ty_end:%d\n", x, y, x_end, y_end);
dx = abs(x_end - x);
dy = abs(y_end - y);
//draw first point
if(steep)
drawPixel(y,x,r,g,b);//x and y was swapped before
else
drawPixel(x,y,r,g,b);
p = 2 * dy - dx;
for( ; x < x_end; ){
x++;
if( p >= 0){ // if d1 - d2 >= 0, means d2 is shorter, so advance y one level up
positive_slope? y++:y--;
p = p + 2*dy - 2*dx;
}
else // if d1 - d2 < 0; means d1 is shorter, so no change of y;
p = p + 2*dy;
if(steep)
drawPixel(y,x,r,g,b);//x and y was swapped before
else
drawPixel(x,y,r,g,b);
}
return 0;
}
void SDLWindow::drawPixel(uint32_t x, uint32_t y, const RGBColor& color)
{
if(mGamma == 1.0)
{
drawPixel(x, y, color.r * 255, color.g * 255, color.b * 255);
}
else
{
drawPixel(x, y,
pow(color.r, mInvGamma) * 255,
pow(color.g, mInvGamma) * 255,
pow(color.b, mInvGamma) * 255
);
}
}
// drawBitmap() variant w/background for RAM-resident (not PROGMEM) bitmaps.
void Adafruit_GFX::drawBitmap(int16_t x, int16_t y,
uint8_t *bitmap, int16_t w, int16_t h, uint16_t color, uint16_t bg) {
int16_t i, j, byteWidth = (w + 7) / 8;
uint8_t byte;
for(j=0; j<h; j++) {
for(i=0; i<w; i++ ) {
if(i & 7) byte <<= 1;
else byte = bitmap[j * byteWidth + i / 8];
if(byte & 0x80) drawPixel(x+i, y+j, color);
else drawPixel(x+i, y+j, bg);
}
}
}
/**************************************************************************//**
* @brief Draw a 9 pixel cross
* @param[in] xpos Horizontal position of cross center
* @param[in] ypos Vertical position of cross center
* @param[in] color Color to use for cross
*****************************************************************************/
static void drawCross( uint32_t xpos, uint32_t ypos, uint16_t color )
{
drawPixel( xpos-2, ypos, color );
drawPixel( xpos-1, ypos, color );
drawPixel( xpos, ypos, color );
drawPixel( xpos+1, ypos, color );
drawPixel( xpos+2, ypos, color );
drawPixel( xpos, ypos-2, color );
drawPixel( xpos, ypos-1, color );
drawPixel( xpos, ypos+1, color );
drawPixel( xpos, ypos+2, color );
}
void makeLine (double x1, double y1, double x2, double y2)
{
for (double x = x1; x <= x2; x++)
{
drawPixel (x,(x-x1)/(x2-x1)*(y2-y1) + y1);
}
}
int main ()
{
for (int count = 0; count <= 9; count++)
{
makeLine (count*100,100,(count+1)*100,150);
//makeLine ()
}
for (double x = 0; x <= 1000; x++)
{
drawPixel (x/2,150+20.0*sin(x/5.0));
}
updateGraphics();
std::cout << "Press any key to continue...";
std::cin.get();
std::cout << std::endl;
return 0;
}
void display(void)
{
int i,k;
glColor3f(1.0,1.0,1.0) ;
glClear(GL_COLOR_BUFFER_BIT);
drawAxis () ;
glColor3f( 1,0,0);
for(i=0;i<n;i++)
{
y[i] = 0 ;
for(k=1;k<=i;k++)
{
y[i] += - a[k]*y[i-k] ;
}
for(k=0;k<=i;k++)
{
y[i] += b[k]*U(i-k) ;
}
}
for(i=0;i<n;i++)
drawPixel(i*10,y[i]*1.0);
glFlush();
}
void drawLine(int x1, int y1, int x2, int y2, int color) {
float u, s, v, d1x, d1y, d2x, d2y, m, n;
int x = x1, y = y1;
u = x2-x1;
v = y2-y1;
d1x = d2x = _sign(u);
d1y = _sign(v);
d2y = 0;
m = abs(u);
n = abs(v);
if (m <= n) {
d2x = 0;
d2y = _sign(v);
m = abs(v);
n = abs(u);
}
s = (int)(m/2);
for (int i=0; i<round(m); i++) {
drawPixel(x, y, color);
s += n;
if (s >= m) {
s -= m;
x += d1x;
y += d1y;
} else {
x += d2x;
y += d2y;
}
}
}
void GxEPD::drawBitmapBM(const uint8_t *bitmap, uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color, int16_t mode)
{
uint16_t inverse_color = (color != GxEPD_WHITE) ? GxEPD_WHITE : GxEPD_BLACK;
uint16_t fg_color = (mode & bm_invert) ? inverse_color : color;
uint16_t bg_color = (mode & bm_invert) ? color : inverse_color;
// taken from Adafruit_GFX.cpp, modified
int16_t byteWidth = (w + 7) / 8; // Bitmap scanline pad = whole byte
uint8_t byte = 0;
for (int16_t j = 0; j < h; j++)
{
for (int16_t i = 0; i < w; i++ )
{
if (i & 7) byte <<= 1;
else
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
byte = pgm_read_byte(&bitmap[j * byteWidth + i / 8]);
#else
byte = bitmap[j * byteWidth + i / 8];
#endif
}
// keep using overwrite mode
uint16_t pixelcolor = (byte & 0x80) ? fg_color : bg_color;
uint16_t xd = x + i;
uint16_t yd = y + j;
if (mode & bm_flip_x) xd = x + w - i;
if (mode & bm_flip_y) yd = y + h - j;
drawPixel(xd, yd, pixelcolor);
}
}
}
int16_t drawChar(uint8_t c, int16_t x, int16_t y){
if(c<32 || (c-32) > charcount){
c=127;
}
c-=32;
uint16_t xc, yc;
uint8_t fontSize = 7;
if(x<-fontSize || x> GFX_WIDTH || y<-8 || y>GFX_HEIGHT){
return x+fontSize;
}
for(xc=0;xc<fontSize;xc++){
// uint8_t slice = (big)?font7x8[c][xc]:font5x7[c][xc];
uint8_t slice = font7x8[c][xc];
for(yc=0;yc<8;yc++){
if(slice & (1<<yc)){
drawPixel(x+xc, y+yc);
}
}
}
return x+fontSize;
}
/*********************************************************************************************************
** Function name: drawLine
** Descriptions: drawLine
*********************************************************************************************************/
void ePaper::drawLine(int x0, int y0, int x1, int y1)
{
init_io();
int x = x1-x0;
int y = y1-y0;
int dx = abs(x), sx = x0<x1 ? 1 : -1;
int dy = -abs(y), sy = y0<y1 ? 1 : -1;
int err = dx+dy, e2;
for (;;)
{
drawPixel(x0,y0,1);
e2 = 2*err;
if (e2 >= dy)
{
if (x0 == x1) break;
err += dy; x0 += sx;
}
if (e2 <= dx)
{
if (y0 == y1) break;
err += dx; y0 += sy;
}
}
}
void drawGradient( SDL_Surface* surface, int x1, int x2, int y, Uint32 color1, Uint32 color2 ) {
int xDist = x1 - x2;
if ( xDist == 0 ) {
printf( "We can only draw horizontal gradients.\n" );
return;
}
Uint8 r1;
Uint8 r2;
Uint8 g1;
Uint8 g2;
Uint8 b1;
Uint8 b2;
SDL_GetRGB( color1, surface->format, &r1, &g1, &b1 );
SDL_GetRGB( color2, surface->format, &r2, &g2, &b2 );
int rDiff = r1 - r2;
int gDiff = g1 - g2;
int bDiff = b1 - b2;
float rStep = -rDiff / fabs(xDist);
float gStep = -gDiff / fabs(xDist);
float bStep = -bDiff / fabs(xDist);
int i = 0;
for ( int x = x1; x <= x2; x++ ) {
drawPixel( surface, x, y, (Uint8)(r1 + ceil(rStep*i)), (Uint8)(g1 + ceil(gStep*i)), (Uint8)(b1 + ceil(bStep*i)) );
i++;
}
}
int main(int argc, char *argv[]){
glutInit(&argc, argv); //initialize GL Utility Toolkit(GLUT) and extract command line arguments for GLUT and keep the counts for the remaining arguments
glutInitDisplayMode(GLUT_SINGLE);
glutInitWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT);
glutInitWindowPosition(100, 100);
int windowID = glutCreateWindow("First Window");
glClearColor(0,0,0,0);
glutDisplayFunc(callback_display);
//std::fill(PixelBuffer, PixelBuffer+WINDOW_WIDTH*WINDOW_HEIGHT*3, 0.5);
drawPixel(WINDOW_WIDTH/2, WINDOW_HEIGHT/2, 1, 1, 1 );
int p[] = {0, 100};
int q[] = {WINDOW_WIDTH/2, 0};
int r[] = {450, 200};
drawLine( p, q , (double)0xdc/255, (double)0x14/255, (double)0x3c/255 );
drawLine( q, r , 0, 0, 1);
drawLine( r, p , 1, 1, 0);
int s[] = {0, 0};
int e[] = {50, 220};
drawLine(s,e, 1,0,1);
int m_Width = 100, m_Height = 100;
glViewport ( 0, 0, m_Width, m_Height );
glMatrixMode ( GL_PROJECTION );
glLoadIdentity ();
glOrtho ( 0.0f, m_Width, 0.0, m_Height, 1.0, -1.0 );
glMatrixMode ( GL_MODELVIEW );
glLoadIdentity ();
glutMainLoop();
return 0;
}
int drawLine(int point1[], int point2[], float r, float g, float b){
int x1, y1, x2, y2;
if( point1[0] < point2[0] ){
x1 = point1[0];
y1 = point1[1];
x2 = point2[0];
y2 = point2[1];
}
else {
x1 = point2[0];
y1 = point2[1];
x2 = point1[0];
y2 = point1[1];
}
float m = (float)(y2 - y1) / (float)(x2 - x1);
DPRINT("Slope of the line, m = %.2f \n", m);
int x, y;
for( x = x1; x <= x2; x++){
y = lround( m * ( x - x1 ) + y1 );
drawPixel(x, y, r, g, b);
}
}
// algorithm from http://www.netgraphics.sk/bresenham-algorithm-for-a-line
void SmartMatrix::drawLine(int16_t x1, int16_t y1, int16_t x2, int16_t y2, const rgb24& color) {
// if point x1, y1 is on the right side of point x2, y2, change them
if ((x1 - x2) > 0) {
drawLine(x2, y2, x1, y1, color);
return;
}
// test inclination of line
// function Math.abs(y) defines absolute value y
if (abs(y2 - y1) > abs(x2 - x1)) {
// line and y axis angle is less then 45 degrees
// thats why go on the next procedure
bresteepline(y1, x1, y2, x2, color); return;
}
// line and x axis angle is less then 45 degrees, so x is guiding
// auxiliary variables
int x = x1, y = y1, sum = x2 - x1, Dx = 2 * (x2 - x1), Dy = abs(2 * (y2 - y1));
int prirastokDy = ((y2 - y1) > 0) ? 1 : -1;
// draw line
for (int i = 0; i <= x2 - x1; i++) {
drawPixel(x, y, color);
x++;
sum -= Dy;
if (sum < 0) {
y = y + prirastokDy;
sum += Dx;
}
}
}
void main()
{
lcdInit();
spiOn();
spiOff();
sendByte(out);
sendArray(array);
lcdOn();
lcdOff();
sendBuffer();
sendPart(3, 7, LCD_Buffer);
clear();
clearPart(5, 76);
clearPartColor(5, 76, clBLACK);
setPenColor(clBLACK);
setBackColor(clWHITE);
delay_nsek(40);
scsOn();
scsOff();
i = getValue(LCD_Buffer, 23, 266);
setValue(LCD_Buffer, 23, 266, 0x3F);
setCharge();
resetCharge();
drawPixel(5, 5, LCD_Buffer);
drawVLine(5, 5, 5, LCD_Buffer);
drawHLine(5, 5, 5, LCD_Buffer);
drawLine(5, 5, 55, 55, LCD_Buffer);
drawRect(5, 5, 55, 55, LCD_Buffer);
drawFillRect(5, 5, 55, 55, clWHITE, LCD_Buffer);
drawCircle(10, 10, 5, LCD_Buffer);
}
void drawVLine(screen scr, u16 col, u16 y1, u16 y2, color clr)
{
if (y1 > y2) swap_u16(&y1, &y2);
u16 i;
for (i = y1; i <= y2; i++) drawPixel(scr, col, i, clr);
}
void drawHLine(screen scr, u16 row, u16 x1, u16 x2, color clr)
{
if (x1 > x2) swap_u16(&x1, &x2);
u16 i;
for (i = x1; i <= x2; i++) drawPixel(scr, i, row, clr);
}
void drawFillRect(int x1, int x2, int y1, int y2, char r, char g, char b, u8* screen)
{
int X1, X2, Y1, Y2;
if (x1 < x2)
{
X1 = x1;
X2 = x2;
}
else
{
X1 = x2;
X2 = x1;
}
if (y1 < y2)
{
Y1 = y1;
Y2 = y2;
}
else
{
Y1 = y2;
Y2 = y1;
}
for (int i = X1; i <= X2; i++)
{
for (int j = Y1; j <= Y2; j++)
{
drawPixel(i, j, r, g, b, screen);
}
}
}
void Screen::draw(Drawable *drawable,bool isflip){
if(!isflip){
draw(drawable);
}
else{
vector<Pixel> result;
//Hitung sumbu vertikal
vector<Pixel> group_of_point=drawable->getPixels();
vector<Pixel>::iterator it;
int vertical_axis=0;
int numb=0;
for(it=group_of_point.begin();it!=group_of_point.end();it++){
vertical_axis+=(it->getPosition()).x;numb++;
}
vertical_axis/=numb;
//transformasi
for(it=group_of_point.begin();it!=group_of_point.end();it++){
int temp=(it->getPosition()).x;
temp=2*vertical_axis-temp;
Point pt(temp,(it->getPosition()).y);
Pixel px(pt,it->getColor());
result.push_back(px);
}
for(it=result.begin();it!=result.end();it++)
drawPixel(*it);
}
}
void fillCircle(int x, int y, int radius){
int x1, y1;
for(y1=-radius; y1<=radius; y1++)
for(x1=-radius; x1<=radius; x1++)
if(x1*x1+y1*y1 <= radius*radius)
drawPixel(x+x1, y+y1);
}
// draw a character
void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size)
{
if(
(x >= _width) || // Clip right
(y >= _height) || // Clip bottom
((x + 5 * size - 1) < 0) || // Clip left
((y + 8 * size - 1) < 0) // Clip top
)
return;
for (int8_t i=0; i<6; i++ )
{
uint8_t line = 0;
if (i == 5)
line = 0x0;
else
line = font[(c*5)+i];
for (int8_t j = 0; j<8; j++)
{
if (line & 0x1)
{
#if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
if (size == 1) // default size
drawPixel(x+i, y+j, color);
else // big size
fillRect(x+(i*size), y+(j*size), size, size, color);
#else
drawPixel(x+i, y+j, color);
#endif
}
else if (bg != color)
{
#if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT)
if (size == 1) // default size
drawPixel(x+i, y+j, bg);
else // big size
fillRect(x+i*size, y+j*size, size, size, bg);
#else
drawPixel(x+i, y+j, bg);
#endif
}
line >>= 1;
}
}
}
// Bresenham's algorithm - borrowed from Adafruit's GFX Library
void Piccolino_OLED::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color) {
int16_t steep = abs(y1 - y0) > abs(x1 - x0);
if (steep) {
swap(x0, y0);
swap(x1, y1);
}
if (x0 > x1) {
swap(x0, x1);
swap(y0, y1);
}
int16_t dx, dy;
dx = x1 - x0;
dy = abs(y1 - y0);
int16_t err = dx / 2;
int16_t ystep;
if (y0 < y1) {
ystep = 1;
} else {
ystep = -1;
}
for (; x0<=x1; x0++) {
if (steep) {
if(color==GRAY)
drawPixel(y0, x0, !(x0%2));
else
drawPixel(y0, x0, color);
} else {
if(color==GRAY)
drawPixel(x0, y0, !(x0%2));
else
drawPixel(x0, y0, color);
}
err -= dy;
if (err < 0) {
y0 += ystep;
err += dx;
}
}
}
void SmartMatrix::drawRoundRectangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
uint16_t radius, const rgb24& outlineColor) {
if (x1 < x0)
SWAPint(x1, x0);
if (y1 < y0)
SWAPint(y1, y0);
// decrease large radius that would break shape
if(radius > (x1-x0)/2)
radius = (x1-x0)/2;
if(radius > (y1-y0)/2)
radius = (y1-y0)/2;
int a = radius, b = 0;
int radiusError = 1 - a;
// draw straight part of outline
drawFastHLine(x0 + radius, x1 - radius, y0, outlineColor);
drawFastHLine(x0 + radius, x1 - radius, y1, outlineColor);
drawFastVLine(x0, y0 + radius, y1 - radius, outlineColor);
drawFastVLine(x1, y0 + radius, y1 - radius, outlineColor);
// convert coordinates to point at center of rounded sections
x0 += radius;
x1 -= radius;
y0 += radius;
y1 -= radius;
while (a >= b)
{
// this pair sweeps from far left towards right
drawPixel(-a + x0, -b + y0, outlineColor);
drawPixel(-a + x0, b + y1, outlineColor);
// this pair sweeps from far right towards left
drawPixel(a + x1, -b + y0, outlineColor);
drawPixel(a + x1, b + y1, outlineColor);
// this pair sweeps from very top towards bottom
drawPixel(-b + x0, -a + y0, outlineColor);
drawPixel(b + x1, -a + y0, outlineColor);
// this pair sweeps from bottom up
drawPixel(-b + x0, a + y1, outlineColor);
drawPixel(b + x1, a + y1, outlineColor);
b++;
if (radiusError < 0) {
radiusError += 2 * b + 1;
} else {
a--;
radiusError += 2 * (b - a + 1);
}
}
}
void screen::updateScreen() {
for(int i=0;i<l;i++) {
for(int j=0;j<L;j++) {
drawPixel(ecran[i][j]);
}
}
SDL_Flip(surf);
}
int main()
{
double x = 0.0;
while (x < M_PI * 2) {
drawPixel((int)(x*50),100 + (int)(sin(x)*100));
x += 0.01;
}
}