68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
#include <glerminal.h>
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#include <cstdlib>
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#include <cmath>
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namespace
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{
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void init()
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{
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srand(0);
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glerminal_load_sprites_file("resources/towers.png");
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for (int i = 0; i < GRID_WIDTH; i++)
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{
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for (int j = 0; j < GRID_HEIGHT; j++)
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{
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const int c = rand() % (LAYER_COUNT * 3 / 4) + LAYER_COUNT / 4;
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for (int k = 0; k < c; k++)
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{
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glerminal_set(i, j, k, 1);
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}
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for (int k = 0; k < LAYER_COUNT; k++)
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{
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constexpr unsigned char min = 16;
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const unsigned char v = (255 - min) * powf((256 / LAYER_COUNT * k - 1) / 256.0f, 2.0f) + min;
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const unsigned int col = (0xFF << 24) | (v << 16) | (v << 8) | v;
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glerminal_color(i, j, k, col);
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glerminal_scale(i, j, k, k / static_cast<float>(LAYER_COUNT) + 1);
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}
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}
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}
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}
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void mainloop(double dt)
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{
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static double time = 0;
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time += dt;
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const float cx = (GRID_WIDTH / 2.0f) * cosf(time / 3.1415f) + (GRID_WIDTH / 2.0f);
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const float cy = (GRID_HEIGHT / 2.0f) * sinf(time / 3.1415f) + (GRID_HEIGHT / 2.0f);
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for (int i = 0; i < GRID_WIDTH; i++)
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{
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for (int j = 0; j < GRID_WIDTH; j++)
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{
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for (int k = 0; k < LAYER_COUNT; k++)
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{
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const float ox = (256.0f / LAYER_COUNT) * 0.0025f * k * (i - cx);
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const float oy = (256.0f / LAYER_COUNT) * 0.0025f * k * (j - cy);
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const float sx = (1 + (256.0f / LAYER_COUNT) * 0.002f * k) * cosf(i + k * 6.2832f / 128.0f + 3.1415f * time / 1.5f);
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const float sy = (1 + (256.0f / LAYER_COUNT) * 0.002f * k) * sinf(j + k * 6.2832f / 128.0f + 3.1415f * time / 1.5f);
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glerminal_offset(i, j, k, ox + sx, oy + sy);
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}
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}
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}
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glerminal_flush();
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}
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}
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int main(int argc, char** argv)
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{
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glerminal_run({init, mainloop});
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} |