Morten ist da. Wir reden über Windows ultimate. Und Ableton.
Jetzt sieht der Code so aus:
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <SDL/SDL.h>
typedef struct _Color Color;
struct _Color
{
unsigned char r, g, b;
};
typedef struct _Point Point;
struct _Point
{
int x, y;
};
SDL_Surface *screen;
void
drawPixel(int x, int y, Color c)
{
*((Uint32*)((char*)screen->pixels + x*screen->format->BytesPerPixel + y*screen->pitch)) = SDL_MapRGB(screen->format, c.r, c.g, c.b);
}
void
drawLine(Point p1, Point p2, Color c)
{
int dx, dy;
int incx, incy;
float m;
dx = p2.x - p1.x;
dy = p2.y - p1.y;
incx = dx>0 ? 1 : -1;
incy = dy>0 ? 1 : -1;
if(dx == 0){
int y;
for(y = p1.y; y != p2.y; y += incy)
drawPixel(p1.x, y, c);
return;
}
if(abs(dx)>abs(dy)){
int x;
float y;
m = (float)dy/(float)abs(dx);
y = p1.y;
for(x = p1.x; x != p2.x; x += incx){
drawPixel(x, y+0.5f, c);
y += m;
}
}else{
int y;
float x;
m = (float)dx/(float)abs(dy);
x = p1.x;
for(y = p1.y; y != p2.y; y += incy){
drawPixel(x+0.5f, y, c);
x += m;
}
}
}
void
drawTriWire(Point p1, Point p2, Point p3, Color c)
{
drawLine(p1, p2, c);
drawLine(p2, p3, c);
drawLine(p3, p1, c);
}
void
drawRect(Point p1, Point p2, Color rgb)
{
int i, j;
for(i = p1.x; i < p2.x; i++)
for(j = p1.y; j < p2.y; j++)
drawPixel(i, j, rgb);
}
void
draw(void)
{
drawRect((Point){40,40}, (Point){50,50}, (Color) {255, 0, 255});
drawRect((Point){80,40}, (Point){90,50}, (Color) {255, 0, 255});
drawRect((Point){62,60}, (Point){68,80}, (Color) {10, 123, 233});
drawRect((Point){40,95}, (Point){90,100}, (Color) {123, 233, 10});
// drawLine((Point){0, 0}, (Point){50, 30});
// drawLine((Point){0, 0}, (Point){30, 50});
// drawLine((Point){50, 0}, (Point){50, 50});
drawTriWire((Point){10,10}, (Point){100, 70}, (Point){30, 150}, (Color){255, 255, 255});
}
int
main(void)
{
int running = 1;
int w = 640;
int h = 480;
SDL_Event event;
SDL_Init(SDL_INIT_VIDEO);
screen = SDL_SetVideoMode(w, h, 32, SDL_HWSURFACE);
while(running){
while(SDL_PollEvent(&event))
if(event.type == SDL_QUIT)
running = 0;
SDL_LockSurface(screen);
draw();
SDL_UnlockSurface(screen);
SDL_UpdateRect(screen, 0, 0, 0, 0);
}
SDL_Quit();
return 0;
}
Und das Resutlat so:
Nächste Mal dann Ausfüllen von Dreiecken, 3D-Rotation und Kreise …;
Morten bastelt daran rum, wie ein Spiel unter Windows startet …;
Diesen Freitag ist noch einmal, dann zwei Wochen Pause.
