X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=camera.h;h=7aa1b14a92eb6b29f03338765587b3afe07dd949;hb=304647a7672165dd35ffe54884ed9aedcc9bf363;hp=596409937ceb3cf2f532c7d22f2c999533bd9fa7;hpb=f7db507815e2822d971031c30f25e02b45e9c914;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/camera.h b/camera.h
index 5964099..7aa1b14 100644
--- a/camera.h
+++ b/camera.h
@@ -1,14 +1,10 @@
-#ifndef CAMERA_H
-#define CAMERA_H
-
-#include "common.h"
+#pragma once
+#if 0
 
 typedef struct camera camera;
-
-struct camera
-{
+struct camera{
    /* Input */
-   v2f angles;
+   v3f angles;
    v3f pos;
    float fov, nearz, farz;
 
@@ -16,24 +12,51 @@ struct camera
    m4x3f transform,
          transform_inverse;
 
-   struct camera_mtx
-   {
+   struct camera_mtx{
       m4x4f p,
             v,
             pv;
    }
    mtx,
    mtx_prev;
+};
+
+static void camera_lerp_angles( v3f a, v3f b, float t, v3f d ){
+   d[0] = vg_alerpf( a[0], b[0], t );
+   d[1] = vg_lerpf(  a[1], b[1], t );
+   d[2] = vg_lerpf(  a[2], b[2], t );
+}
+
+/* lerp position, fov, and angles */
+static void camera_lerp( camera *a, camera *b, float t, camera *d ){
+   v3_lerp( a->pos, b->pos, t, d->pos );
+   camera_lerp_angles( a->angles, b->angles, t, d->angles );
+   d->fov = vg_lerpf( a->fov, b->fov, t );
+}
+
+static void camera_copy( camera *a, camera *d ){
+   v3_copy( a->pos, d->pos );
+   v3_copy( a->angles, d->angles );
+   d->fov = a->fov;
+}
+
+static void m4x3_transform_camera( m4x3f m, camera *cam ){
+   m4x3_mulv( m, cam->pos, cam->pos );
+
+   v3f v0;
+   v3_angles_vector( cam->angles, v0 );
+   m3x3_mulv( m, v0, v0 );
+   v3_normalize( v0 );
+   v3_angles( v0, cam->angles );
 }
-VG_STATIC main_camera;
 
 /*
  * 1) [angles, pos] -> transform 
  */
-VG_STATIC void camera_update_transform( camera *cam )
+static void camera_update_transform( camera *cam )
 {
    v4f qyaw, qpitch, qcam;
-   q_axis_angle( qyaw, (v3f){ 0.0f, 1.0f, 0.0f },   -cam->angles[0] );
+   q_axis_angle( qyaw,   (v3f){ 0.0f, 1.0f, 0.0f }, -cam->angles[0] );
    q_axis_angle( qpitch, (v3f){ 1.0f, 0.0f, 0.0f }, -cam->angles[1] );
 
    q_mul( qyaw, qpitch, qcam );
@@ -44,7 +67,7 @@ VG_STATIC void camera_update_transform( camera *cam )
 /*
  * 2) [transform] -> transform_inverse, view matrix
  */
-VG_STATIC void camera_update_view( camera *cam )
+static void camera_update_view( camera *cam )
 {
    m4x4_copy( cam->mtx.v,  cam->mtx_prev.v );
    m4x3_invert_affine( cam->transform, cam->transform_inverse );
@@ -54,7 +77,7 @@ VG_STATIC void camera_update_view( camera *cam )
 /*
  * 3) [fov,nearz,farz] -> projection matrix
  */
-VG_STATIC void camera_update_projection( camera *cam )
+static void camera_update_projection( camera *cam )
 {
    m4x4_copy( cam->mtx.p,  cam->mtx_prev.p );
    m4x4_projection( cam->mtx.p, cam->fov,
@@ -65,42 +88,9 @@ VG_STATIC void camera_update_projection( camera *cam )
 /*
  * 4) [projection matrix, view matrix] -> previous pv, new pv 
  */
-VG_STATIC void camera_finalize( camera *cam )
+static void camera_finalize( camera *cam )
 {
    m4x4_copy( cam->mtx.pv, cam->mtx_prev.pv );
    m4x4_mul( cam->mtx.p, cam->mtx.v, cam->mtx.pv );
 }
-
-/* 
- * http://www.terathon.com/lengyel/Lengyel-Oblique.pdf 
- */
-VG_STATIC void m4x4_clip_projection( m4x4f mat, v4f plane )
-{
-   v4f c = 
-   {
-      (vg_signf(plane[0]) + mat[2][0]) / mat[0][0],
-      (vg_signf(plane[1]) + mat[2][1]) / mat[1][1],
-      -1.0f,
-      (1.0f + mat[2][2]) / mat[3][2]
-   };
-
-   v4_muls( plane, 2.0f / v4_dot(plane,c), c );
-
-   mat[0][2] = c[0];
-   mat[1][2] = c[1];
-   mat[2][2] = c[2] + 1.0f;
-   mat[3][2] = c[3];
-}
-
-/*
- * Undoes the above operation
- */
-VG_STATIC void m4x4_reset_clipping( m4x4f mat, float ffar, float fnear )
-{
-   mat[0][2] = 0.0f; 
-   mat[1][2] = 0.0f; 
-   mat[2][2] = -(ffar + fnear) / (ffar - fnear); 
-   mat[3][2] = -2.0f * ffar * fnear / (ffar - fnear); 
-}
-
-#endif /* CAMERA_H */
+#endif