82 lines
2.8 KiB
Plaintext
82 lines
2.8 KiB
Plaintext
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// terrain generation globals
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int tg_cols, tg_rows;
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int tg_scale = 40;
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float tg_t = 0;
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float[][] tg_grid;
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float tg_speed;
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float tg_height;
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Star[] tg_stars = new Star[500];
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int tg_starfield_speed = 1;
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void midi_terrain_generation(int status, int chan, int value)
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{
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if (status == -80 && chan == 7)
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tg_speed = float(value) / float(10);
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if (status == -79 && chan == 7)
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tg_height = (log(128) - log(128 - value)) * float(1000);
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if (status == -78 && chan == 7)
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tg_starfield_speed = 1 + value;
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}
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void setup_terrain_generation()
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{
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tg_cols = width / tg_scale;
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tg_rows = height / tg_scale;
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tg_grid = new float[tg_cols + 200][tg_rows + 100];
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for (int y = -100; y < tg_rows; y++)
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for (int x = -100; x < tg_cols + 100; x++)
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{
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if (x < width/2 - 100 || x > width / 2 + 100)
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tg_grid[x + 100][y + 100] = noise(float(x) / 5, float(y) / 5) * 1000;
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else
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tg_grid[x + 100][y + 100] = 0;
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}
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tg_setup_star();
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}
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void draw_terrain_generation()
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{
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background(0);
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stroke(255, 0, 128);
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fill(255, 0, 128);
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noFill();
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pushMatrix();
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translate(0, height /2 + tg_height);
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if (tg_height < 4000)
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{
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pushMatrix();
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rotateX(PI / 3);
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for (int y = -100; y < tg_rows - 1; y++)
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{
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beginShape(TRIANGLE_STRIP);
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for (int x = -100; x < tg_cols + 100; x++)
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{
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strokeWeight(1);
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if ((x < tg_cols/2 - 4 || x > tg_cols / 2 + 4))
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{
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stroke(100 * 255 / tg_grid[x + 100][y + 100], 0, 100 * 128 / tg_grid[x + 100][y + 100] + abs(tg_t % 512 - 255));
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vertex(x * tg_scale, y * tg_scale, tg_grid[x + 100][y + 100]);
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stroke(100 * 255 / tg_grid[x + 100][y + 100], 0, 100 * 128 / tg_grid[x + 100][y + 1 + 100] + abs(tg_t % 512 - 255));
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vertex(x * tg_scale,(y + 1) * tg_scale, tg_grid[x + 100][y + 1 + 100]);
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}
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else
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{
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stroke(0, 100 * 255 / tg_grid[x + 100][y + 100], 100 * 128 / tg_grid[x + 100][y + 100] + abs(tg_t % 512 - 255));
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vertex(x * tg_scale, y * tg_scale, 0);
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stroke(0, 100 * 255 / tg_grid[x + 100][y + 100], 100 * 128 / tg_grid[x + 100][y + 1 + 100] + abs(tg_t % 512 - 255));
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vertex(x * tg_scale,(y + 1) * tg_scale, 0);
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}
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tg_grid[x + 100][y + 100] = noise((float(x)) / 5, (y + tg_t) / 5) * 300;
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}
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endShape();
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}
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popMatrix();
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}
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translate(0, -height * 7.5);
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tg_manage_star();
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popMatrix();
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tg_t -= tg_speed;
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}
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