Synthasmagoria/transformation_visualizer
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Get rectangle corners as triangles

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Synthasmagoria 2026-08-30 15:06:47 +02:00
commit b95b7659c3
5 changed files with 96 additions and 60 deletions
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79
src/program.odin
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@ -31,6 +31,7 @@ import rl "libraries/raylib"
import ui "libraries/snths_ui"
import "core:mem"
import "core:fmt"
import "core:math"
import "core:math/linalg"
import "core:strings"
@ -372,6 +373,11 @@ program_show_dialog :: proc(program: ^Program, dialog_type: ProgramDialogType, m
program.state = .Dialog
program.dialog_type = dialog_type
program.dialog_message = message
mem.set(&program.dialog_data, 0, size_of(program.dialog_data))
for i in 0..<len(program.dialog_data.input_float_values) {
program.dialog_data.input_float_values[i] = 0.0
program.dialog_data.input_float_value_strings[i][0] = '0'
}
}
program_init :: proc(allocator := context.allocator) {
@ -598,36 +604,21 @@ program_update :: proc() {
program_add_identity_matrix :: proc() {
value_strings, values := matrix_pool_get_mat3()
value_strings[0][0] = '1'
values[0] = 1.0
value_strings[4][0] = '1'
values[4] = 1.0
value_strings[8][0] = '1'
values[8] = 1.0
write_matrix_to_values_and_value_strings(values, value_strings, mat3(1))
}
program_add_translation_matrix :: proc(x, y, z: f32) {
value_strings, values := matrix_pool_get_mat3()
value_strings[0][0] = '1'
values[0] = 1.0
value_strings[4][0] = '1'
values[4] = 1.0
fmt.bprint(value_strings[6][:], x)
values[6] = x
fmt.bprint(value_strings[7][:], y)
values[7] = y
fmt.bprint(value_strings[8][:], z)
values[8] = z
write_matrix_to_values_and_value_strings(values, value_strings, mat3 {
1, 0, x,
0, 1, y,
0, 0, z,
})
}
program_add_scalar_matrix :: proc(x, y, z: f32) {
value_strings, values := matrix_pool_get_mat3()
fmt.bprint(value_strings[0][:], x)
values[0] = x
fmt.bprint(value_strings[4][:], y)
values[4] = y
fmt.bprint(value_strings[8][:], z)
values[8] = z
write_matrix_to_values_and_value_strings(values, value_strings, linalg.matrix3_scale(v3{x, y, z}))
}
program_add_rotation_matrix :: proc(angle: f32) {
@ -637,31 +628,29 @@ program_add_rotation_matrix :: proc(angle: f32) {
case .Degrees: radians = linalg.RAD_PER_DEG * angle
case .Radians: radians = angle
}
write_matrix_to_values_and_value_strings(values, value_strings, matrix3_rotate2(radians))
}
a := linalg.cos(radians)
b := linalg.sin(radians)
fmt.bprintf(value_strings[0][:], "%.3f", a)
values[0] = a
fmt.bprintf(value_strings[1][:], "%.3f", -b)
values[1] = -b
fmt.bprintf(value_strings[3][:], "%.3f", b)
values[3] = b
fmt.bprintf(value_strings[4][:], "%.3f", a)
values[4] = a
fmt.bprint(value_strings[8][:], f32(1.0))
values[8] = 1.0
write_matrix_to_values_and_value_strings :: proc(values: []f32, value_strings: []InputFloatField, mat: mat3) {
for i in 0..<9 {
col := i % 3
row := i / 3
values[i] = mat[col, row]
write_float_to_buffer(value_strings[i][:], mat[col, row])
}
}
// rotmat := linalg.matrix2_rotate_f32(angle)
// fmt.bprint(value_strings[0][:], rotmat[0, 0])
// values[0] = rotmat[0, 0]
// fmt.bprint(value_strings[1][:], rotmat[0, 1])
// values[1] = rotmat[0, 1]
// fmt.bprint(value_strings[1][:], rotmat[1, 0])
// values[3] = rotmat[1, 0]
// fmt.bprint(value_strings[4][:], rotmat[1, 1])
// values[4] = rotmat[1, 1]
// fmt.bprint(value_strings[8][:], 1)
// values[8] = 1.0
write_float_to_buffer :: proc(buffer: []byte, value: f32) {
fraction := fract(value)
if fraction == 0.0 {
fmt.bprintf(buffer, "%.0f", value)
} else if math.floor(fraction * 10.0) == 1.0 {
fmt.bprintf(buffer, "%.1f", value)
} else if math.floor(fraction * 100.0) == 1.0 {
fmt.bprintf(buffer, "%.2f", value)
} else {
fmt.bprintf(buffer, "%.3f", value)
}
}
program_build_dialog_ui :: proc(ctx: ^ui.Context, dialog_type: ProgramDialogType) -> []ui.Element {