82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
#include "v4k.h"
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vec3 campos1;
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vec3 campos2;
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tween_t anim;
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bool cam_tween_reset=1;
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camera_t cam;
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#define NUM_SAMPLES 64
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int tick_mode = 0;
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static double smooth_delta() {
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static double time_samples[NUM_SAMPLES] = {0};
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static int curr_index = 0;
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double time = window_delta();
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time_samples[curr_index] = time;
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if (++curr_index == NUM_SAMPLES)
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curr_index = 0;
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double average = 0;
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for (int i = NUM_SAMPLES; i--; )
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average += time_samples[i];
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average /= NUM_SAMPLES;
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time = min(time, average);
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return time;
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}
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bool intro_camera() {
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const float START_MOVING_ONTO_PLANET = 1.5f;
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const float STAY_PUT_AT_PLANET = 4.0f;
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const float ZOOM_OUT_TO_BOARD = 5.0f;
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const float STAY_STILL = 6.0f;
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const float LIFT_OFF = 7.0f;
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if (cam_tween_reset) {
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anim = tween();
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tween_setkey(&anim, 0.0f, campos1, EASE_QUAD);
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tween_setkey(&anim, START_MOVING_ONTO_PLANET, campos1, EASE_QUAD);
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tween_setkey(&anim, STAY_PUT_AT_PLANET, campos2, EASE_QUAD);
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tween_setkey(&anim, ZOOM_OUT_TO_BOARD, campos2, EASE_QUAD);
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tween_setkey(&anim, LIFT_OFF, campos1, EASE_QUAD);
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cam_tween_reset=0;
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}
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float val = !tick_mode ? window_delta() : tick_mode == 1 ? smooth_delta() : 0.016f;
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printf("dt: %.04f\n", val);
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bool done = tween_update(&anim, val) == 1.0f;
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cam.position = anim.result;
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camera_lookat(&cam, vec3(cam.position.x,0,cam.position.z));
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return done;
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}
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void reset_intro() {
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cam_tween_reset=1;
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tween_destroy(&anim);
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campos1 = vec3(0.0f, 5.0f, 0.0f);
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campos2 = vec3(0.0f, 25.0f, 0.0f);
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}
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int main() {
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window_create(75.0, WINDOW_FULLSCREEN|WINDOW_SQUARE/*|WINDOW_VSYNC_DISABLED*/);
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// window_fps_unlock();
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// window_fps_lock(60.0);
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cam = camera();
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reset_intro();
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while( window_swap() && !input(KEY_ESC) ) { // game loop
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if (intro_camera())
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reset_intro();
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ddraw_circle(vec3(0,0,0), vec3(0,-1,0), 1.5f);
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if (input_down(KEY_SPACE))
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tick_mode = ++tick_mode % 3;
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ddraw_text2d(vec2(15, 95), va("mode: %s\n", !tick_mode ? "delta time" : tick_mode == 1 ? "avg delta time" : "fixed time increment"));
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}
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}
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