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2021-32-bit-holiday-jam
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Add arrow key spinnies

main
_ 2020-01-17 23:18:08 -06:00
parent 8426d3d5b8
commit 71400eb4ff
1 changed files with 33 additions and 4 deletions
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37
src/main.rs
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@ -6,8 +6,7 @@ use nom::{
};
use sdl2::event::Event;
use sdl2::keyboard::Keycode;
use sdl2::keyboard::{Keycode, Scancode};
use std::collections::HashMap;
use std::convert::TryInto;
use std::ffi::{c_void, CStr, CString};
@ -622,6 +621,10 @@ fn main () {
let mut last_frame_time = Instant::now ();
let mut frame = 0;
let mut timestep_accum = Duration::from_millis (0);
let mut azimuth: f32 = 0.0;
let mut altitude: f32 = 0.0;
let mut spin_speed: i32 = 0;
const SPIN_RAMP_TIME: i32 = 30;
//println! ("Entering main loop");
@ -637,10 +640,34 @@ fn main () {
timestep_accum += (frame_time - last_frame_time).mul_f32 (fps_num);
let keyboard_state = event_pump.keyboard_state ();
for _ in 0..4 {
if timestep_accum > Duration::from_millis (fps_den) {
frame += 1;
timestep_accum -= Duration::from_millis (fps_den);
let spin_f = 4.0 * spin_speed as f32 / SPIN_RAMP_TIME as f32;
if keyboard_state.is_scancode_pressed (Scancode::Left) {
spin_speed = std::cmp::min (spin_speed + 1, SPIN_RAMP_TIME);
azimuth += spin_f;
}
else if keyboard_state.is_scancode_pressed (Scancode::Right) {
spin_speed = std::cmp::min (spin_speed + 1, SPIN_RAMP_TIME);
azimuth -= spin_f;
}
else if keyboard_state.is_scancode_pressed (Scancode::Up) {
spin_speed = std::cmp::min (spin_speed + 1, SPIN_RAMP_TIME);
altitude = f32::min (90.0, altitude + spin_f);
}
else if keyboard_state.is_scancode_pressed (Scancode::Down) {
spin_speed = std::cmp::min (spin_speed + 1, SPIN_RAMP_TIME);
altitude = f32::max (-90.0, altitude - spin_f);
}
else {
spin_speed = 0;
}
}
else {
break;
@ -663,8 +690,10 @@ fn main () {
window.gl_make_current (&gl_ctx).unwrap ();
let longitude = (frame as f32).to_radians ();
let latitude = (frame as f32 / 5.0).to_radians ().sin () * -40.0f32.to_radians () - 75.0f32.to_radians ();
//let longitude = (frame as f32).to_radians ();
let longitude = azimuth.to_radians ();
let latitude = (altitude - 90.0).to_radians ();
//let latitude = (frame as f32 / 5.0).to_radians ().sin () * -40.0f32.to_radians () - 75.0f32.to_radians ();
let proj_mat = Mat4::perspective_rh_gl (30.0f32.to_radians (), 1280.0 / 720.0, 0.5, 500.0);