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package main
import rl "vendor:raylib"
import "core:fmt"
import "core:math"
import "core:os"
import "core:strconv"
import "core:reflect"
waveform_a : []f32 : {0.0, 0.1, 0.5, 0.3, 0.1, -0.1, 0.0, 0.0, 0.0, 0.0, 0.1, 0.3, 0.0}
waveform_b : []f32 : {0.0, 0.0, 0.0, 0.2, 0.4, 0.2, -0.1, 0.0, 0.0, 0.1, 0.3, 0.1, 0.0}
YELLOW : rl.Color = {254, 175, 1, 255}
ORANGE : rl.Color = {238, 123, 26, 255}
RED : rl.Color = {222, 73, 50, 255}
LERP_SPEED :: 0.20
layout :: struct {
wave_a_start : rl.Vector2,
wave_a_end : rl.Vector2,
wave_a_amp : f32,
wave_b_start : rl.Vector2,
wave_b_end : rl.Vector2,
wave_b_amp : f32,
grid_opacity : f32,
grid_highlight_opacity : f32,
grid_highlight_position : rl.Vector2,
}
slides : [dynamic]layout
state : layout
target : layout
delta : f32
init_slides :: proc() {
// 0
current_slide : layout = {
wave_a_start = {-600, -250},
wave_a_end = {600, -250},
wave_a_amp = 250,
wave_b_start = {-600, 250},
wave_b_end = {600, 250},
wave_b_amp = 250,
grid_opacity = 0,
grid_highlight_opacity = 0,
grid_highlight_position = 0,
}
append(&slides, current_slide)
}
lerp :: proc() {
layout_info := type_info_of(layout)
// Handle the named type wrapper
actual_info := layout_info
if named_info, ok := layout_info.variant.(reflect.Type_Info_Named); ok {
actual_info = named_info.base
}
// Now cast to struct
struct_info := actual_info.variant.(reflect.Type_Info_Struct)
for i in 0..<struct_info.field_count {
field_type := struct_info.types[i]
field_offset := struct_info.offsets[i]
// Get pointers to the field in both global structs
state_ptr := rawptr(uintptr(&state) + field_offset)
target_ptr := rawptr(uintptr(&target) + field_offset)
// Type switch to lerp and write directly back to state
switch field_type.id {
case typeid_of(f32):
from_val := (cast(^f32)state_ptr)^
to_val := (cast(^f32)target_ptr)^
(cast(^f32)state_ptr)^ = from_val + (to_val - from_val) * (1.0 - math.pow(LERP_SPEED, delta))
case typeid_of(rl.Vector2):
from_val := (cast(^rl.Vector2)state_ptr)^
to_val := (cast(^rl.Vector2)target_ptr)^
(cast(^rl.Vector2)state_ptr)^ = from_val + (to_val - from_val) * (1.0 - math.pow(LERP_SPEED, delta))
}
}
}
normalize :: proc(v : rl.Vector2) -> rl.Vector2 {
return v / math.sqrt((v.x*v.x) + (v.y*v.y))
}
draw_waveform :: proc(wave : []f32, start : rl.Vector2, end : rl.Vector2, amp : f32) {
samples := len(wave)
lines := samples-1
rl.DrawLineEx(start, end, 2, rl.DARKGRAY)
total_direction := end - start
step := total_direction / f32(lines)
perpendicular : rl.Vector2 = normalize({total_direction.y, -total_direction.x})
end_pos : rl.Vector2
for value, i in wave[:lines] {
start_base := start + (step*f32(i))
end_base := start + (step*f32(i+1))
start_pos : rl.Vector2 = start_base + (perpendicular*wave[i]*amp)
end_pos = end_base + (perpendicular*wave[i+1]*amp)
rl.DrawLineEx(start_pos, end_pos, 4, rl.PURPLE)
rl.DrawCircleV(start_pos, 5, rl.RED)
}
rl.DrawCircleV(end_pos, 5, rl.RED)
}
draw_grid :: proc(first : rl.Vector2, last : rl.Vector2) {
}
main :: proc() {
fast_forward := -1
if len(os.args) > 1 {
fast_forward, _ = strconv.parse_int(os.args[1])
}
fmt.println("Hello")
// Initialization
//--------------------------------------------------------------------------------------
slide : int = 0
rotation : f32 = 0.0
cameraX : f32 = 0.0
cameraY : f32 = 0.0
camera : rl.Camera2D = {
zoom=1
}
init_slides()
rl.SetConfigFlags({.WINDOW_RESIZABLE})
rl.InitWindow(1920, 1080, "BSC 2025 Presentation")
rl.SetTargetFPS(60)
rl.SetExitKey(nil)
camera.offset = {f32(rl.GetScreenWidth()) / 2, f32(rl.GetScreenHeight()) / 2}
camera.zoom = f32(rl.GetScreenHeight())/1080
for !rl.WindowShouldClose() {
delta = rl.GetFrameTime()
if rl.IsWindowResized() {
height := f32(rl.GetScreenHeight())
width := f32(rl.GetScreenWidth())
camera.offset = {width / 2, height / 2}
camera.zoom = height/1080
}
// Input
//----------------------------------------------------------------------------------
go_forward := false
go_back := false
mousePosition := rl.GetMousePosition()
left_clicked := rl.IsMouseButtonReleased(rl.MouseButton(0))
right_clicked := rl.IsMouseButtonReleased(rl.MouseButton(1))
right_arrow := rl.IsKeyReleased(.RIGHT)
left_arrow := rl.IsKeyReleased(.LEFT)
go_forward = left_clicked || right_arrow
go_back = right_clicked || left_arrow
if slide < fast_forward {
go_forward = true
} else {
fast_forward = -1
}
// Process
//----------------------------------------------------------------------------------
if go_forward {
slide += 1
fmt.printfln("Forward! To slide #{}", slide)
} else if go_back {
slide -= 1
fmt.printfln("Back up! To slide #{}", slide)
}
target = slides[slide]
lerp()
// Draw
//----------------------------------------------------------------------------------
rl.BeginDrawing()
rl.ClearBackground(rl.Color{16, 16, 16, 255})
rl.BeginMode2D(camera)
// World-space drawing
draw_waveform(waveform_a, state.wave_a_start, state.wave_a_end, state.wave_a_amp)
draw_waveform(waveform_b, state.wave_b_start, state.wave_b_end, state.wave_b_amp)
rl.EndMode2D()
// Screen-space drawing
rl.DrawFPS(rl.GetScreenWidth() - 95, 10)
rl.EndDrawing()
//----------------------------------------------------------------------------------
free_all(context.temp_allocator)
}
rl.CloseWindow()
}
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