63 lines
1.3 KiB
C++
63 lines
1.3 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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glerminal_load_sprites_file("resources/towers.png");
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for (int i = 0; i < 256; i++)
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{
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constexpr unsigned char c = 0;
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const unsigned char v = (255 - c) * powf((i - 1) / 256.0f, 2.0f) + c;
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const unsigned int j = (0x7F << 24) | (v << 16) | (v << 8) | v;
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glerminal_layer_color(i, j);
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glerminal_layer_scale(i, i / 256.0f + 1);
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}
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for (int i = 0; i < 40; i++)
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{
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for (int j = 0; j < 25; j++)
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{
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const int c = rand() % 224 + 32;
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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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}
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}
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}
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void mainloop(float dt)
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{
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static float time = 0;
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time += dt;
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const float cx = 20.0f * cosf(time / 3.1415f) + 20.0f;
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const float cy = 12.5f * sinf(time / 3.1415f) + 12.5f;
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for (int i = 0; i < 40; i++)
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{
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for (int j = 0; j < 25; j++)
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{
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for (int k = 0; k < 256; k++)
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{
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const float ox = 0.01f * k * (i - cx);
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const float oy = 0.01f * k * (j - cy);
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glerminal_offset(i, j, k, ox + (1 + 0.004f * k) * cosf(i + k * 6.2832f / 128.0f + 3.1415f * time), oy + (1 + 0.004f * k) * sinf(j + k * 6.2832f / 128.0f + 3.1415f * time));
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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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} |