commit 01eaf683a4811b49a6e7645d036e15ec8bdc9d54
parent acf65e0e79ad15c833039825afdb9d5839db000a
Author: amin <dev@aminmesbah.com>
Date: Thu, 23 Mar 2017 20:38:41 +0000
Rename Particle to Star.
FossilOrigin-Name: fee7d6bf62f63eed2ff355b1a7f7ee97b2cc0a812679f0e62312216528d3c8fc
Diffstat:
| M | stars.cpp | | | 80 | ++++++++++++++++++++++++++++++++++++++++---------------------------------------- |
1 file changed, 40 insertions(+), 40 deletions(-)
diff --git a/stars.cpp b/stars.cpp
@@ -14,7 +14,7 @@
#define SCREEN_WIDTH 640
#define SCREEN_HEIGHT 480
#define BYTES_PER_PIXEL 4
-#define NUM_PARTICLES 10000
+#define NUM_STARS 10000
#define SECOND 1000.0f
#define FPS 60
@@ -33,7 +33,6 @@
#define COLOR_BLUE 0x268bD2
#define COLOR_CYAN 0x2AA198
#define COLOR_GREEN 0x859900
-
#define COLOR_BACKGROUND COLOR_BLACK
enum color_t
@@ -65,7 +64,7 @@ struct SDLWindowDimension
int height;
};
-struct Particle
+struct Star
{
float angle;
float speed;
@@ -190,43 +189,44 @@ void clear_screen(SDLOffscreenBuffer buffer, uint32_t pixel_value)
memset(buffer.memory, pixel_value, buffer.height * buffer.width * BYTES_PER_PIXEL);
}
-void update(Particle particles[], int num_particles, SDLWindowDimension* dimension)
+
+void update(Star stars[], int num_stars, SDLWindowDimension* dimension)
{
- for (int i = 0; i < num_particles; ++i)
+ for (int i = 0; i < num_stars; ++i)
{
- particles[i].x += sinf(particles[i].angle) * particles[i].speed;
- particles[i].y += cosf(particles[i].angle) * particles[i].speed;
+ stars[i].x += sinf(stars[i].angle) * stars[i].speed;
+ stars[i].y += cosf(stars[i].angle) * stars[i].speed;
- if (particles[i].x > dimension->width)
+ if (stars[i].x > dimension->width)
{
- particles[i].x = 0;
+ stars[i].x = 0;
}
- else if (particles[i].x < 0)
+ else if (stars[i].x < 0)
{
- particles[i].x = dimension->width;
+ stars[i].x = dimension->width;
}
- if (particles[i].y > dimension->height)
+ if (stars[i].y > dimension->height)
{
- particles[i].y = 0;
+ stars[i].y = 0;
}
- else if (particles[i].y < 0)
+ else if (stars[i].y < 0)
{
- particles[i].y = dimension->height;
+ stars[i].y = dimension->height;
}
}
}
-void render(SDLOffscreenBuffer buffer, float dt, Particle particles[], int num_particles)
+void render(SDLOffscreenBuffer buffer, float dt, Star stars[], int num_stars)
{
//printf("%f\n", dt);
- for (int i = 0; i < num_particles; ++i)
+ for (int i = 0; i < num_stars; ++i)
{
set_pixel(
buffer,
- particles[i].x + (sinf(particles[i].angle) * particles[i].speed) * dt,
- particles[i].y + (cosf(particles[i].angle) * particles[i].speed) * dt,
- particles[i].color);
+ stars[i].x + (sinf(stars[i].angle) * stars[i].speed) * dt,
+ stars[i].y + (cosf(stars[i].angle) * stars[i].speed) * dt,
+ stars[i].color);
}
}
@@ -261,48 +261,48 @@ int main(int argc, char **argv)
uint64_t lag = 0;
uint64_t previous_ms = (SDL_GetPerformanceCounter() * SECOND) / SDL_GetPerformanceFrequency();
- Particle particles[NUM_PARTICLES];
- for (int i = 0; i < NUM_PARTICLES; ++i)
+ Star stars[NUM_STARS];
+ for (int i = 0; i < NUM_STARS; ++i)
{
- particles[i].x = rand() % dimension.width;
- particles[i].y = rand() % dimension.height;
- particles[i].angle = ((float)rand()/(float)(RAND_MAX)) * 2 * M_PI;
- particles[i].speed = 0.1;
- particles[i].mass = 10;
- particles[i].color = COLOR_WHITE;
+ stars[i].x = rand() % dimension.width;
+ stars[i].y = rand() % dimension.height;
+ stars[i].angle = ((float)rand()/(float)(RAND_MAX)) * 2 * M_PI;
+ stars[i].speed = 0.1;
+ stars[i].mass = 10;
+ stars[i].color = COLOR_WHITE;
//enum color_t color = (color_t)(rand() % NUM_COLORS);
//switch(color)
//{
// case YELLOW:
- // particles[i].color = COLOR_YELLOW;
+ // stars[i].color = COLOR_YELLOW;
// break;
// case ORANGE:
- // particles[i].color = COLOR_ORANGE;
+ // stars[i].color = COLOR_ORANGE;
// break;
// case RED:
- // particles[i].color = COLOR_RED;
+ // stars[i].color = COLOR_RED;
// break;
// case MAGENTA:
- // particles[i].color = COLOR_MAGENTA;
+ // stars[i].color = COLOR_MAGENTA;
// break;
// case VIOLET:
- // particles[i].color = COLOR_VIOLET;
+ // stars[i].color = COLOR_VIOLET;
// break;
// case BLUE:
- // particles[i].color = COLOR_BLUE;
+ // stars[i].color = COLOR_BLUE;
// break;
// case CYAN:
- // particles[i].color = COLOR_CYAN;
+ // stars[i].color = COLOR_CYAN;
// break;
// case GREEN:
- // particles[i].color = COLOR_GREEN;
+ // stars[i].color = COLOR_GREEN;
// break;
// default:
- // particles[i].color = COLOR_WHITE;
+ // stars[i].color = COLOR_WHITE;
// break;
//}
- //printf("%f, %f, %f, %f, %f\n", particles[i].angle, sinf(particles[i].angle), cosf(particles[i].angle), particles[i].speed, particles[i].mass);
+ //printf("%f, %f, %f, %f, %f\n", stars[i].angle, sinf(stars[i].angle), cosf(stars[i].angle), stars[i].speed, stars[i].mass);
}
while (running)
@@ -327,12 +327,12 @@ int main(int argc, char **argv)
while (lag >= MS_PER_UPDATE)
{
- update(particles, NUM_PARTICLES, &dimension);
+ update(stars, NUM_STARS, &dimension);
//printf("\t%" PRIu64 ", %f\n", lag, MS_PER_UPDATE);
lag -= MS_PER_UPDATE;
}
clear_screen(global_back_buffer, COLOR_BACKGROUND);
- render(global_back_buffer, lag/SECOND, particles, NUM_PARTICLES);
+ render(global_back_buffer, lag/SECOND, stars, NUM_STARS);
sdl_update_window(window, renderer, global_back_buffer);
if (elapsed_ms <= MS_PER_FRAME)
{
