diff options
Diffstat (limited to 'src/renderer.rs')
| -rw-r--r-- | src/renderer.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/renderer.rs b/src/renderer.rs index 28dbb36..7815673 100644 --- a/src/renderer.rs +++ b/src/renderer.rs @@ -1,2 +1,18 @@ +use crate::calculus::calculus::Vec3; +use crate::global::{CAMERA_CENTER, FOCAL_LENGTH, VIEWPORT_HEIGHT, VIEWPORT_WIDTH}; + fn render() { + let viewport_hor_vector = Vec3{ x: VIEWPORT_WIDTH as f32, y: 0.0, z: 0.0 }; + let viewport_ver_vector = Vec3 { x: 0.0, y: -1f32 * VIEWPORT_HEIGHT as f32, z: 0.0 }; + + let delta_pixel_u = viewport_hor_vector.scalar_mul(1.0 / VIEWPORT_WIDTH as f32); + let delta_u = viewport_ver_vector.scalar_mul(1.0 / VIEWPORT_WIDTH as f32); + + let viewport_upper_left = CAMERA_CENTER + .sub(&Vec3 { x: 0f32, y: 0f32, z: FOCAL_LENGTH}) + .sub(&viewport_hor_vector.scalar_mul(0.5)) + .sub(&viewport_ver_vector.scalar_mul(0.5)); + let pixel_upper_left = viewport_upper_left.add( + &delta_pixel_u.add(&delta_pixel_u).scalar_mul(0.5) + ); }
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