From 34a0ef80cb887dd8354f966a1559dbb437beb015 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Wed, 13 Jan 2010 19:52:00 -0500 Subject: Fold repeated dmnsn_line_point() calls. --- libdimension/raytrace.c | 30 +++++++++++------------------- 1 file changed, 11 insertions(+), 19 deletions(-) (limited to 'libdimension/raytrace.c') diff --git a/libdimension/raytrace.c b/libdimension/raytrace.c index 84e170a..71b6e5c 100644 --- a/libdimension/raytrace.c +++ b/libdimension/raytrace.c @@ -220,6 +220,7 @@ typedef struct dmnsn_raytrace_state { dmnsn_kD_splay_tree *kD_splay_tree; unsigned int level; + dmnsn_vector r; dmnsn_color pigment; } dmnsn_raytrace_state; @@ -309,9 +310,8 @@ dmnsn_line_add_epsilon(dmnsn_line l) static dmnsn_color dmnsn_raytrace_pigment(const dmnsn_raytrace_state *state) { - dmnsn_vector r = dmnsn_line_point(state->intersection->ray, - state->intersection->t); - return DMNSN_TEXTURE_CALLBACK(state, pigment, pigment_fn, dmnsn_black, r); + return DMNSN_TEXTURE_CALLBACK(state, pigment, pigment_fn, dmnsn_black, + state->r); } /* Get the color of a light ray at an intersection point */ @@ -319,9 +319,8 @@ static dmnsn_color dmnsn_raytrace_light_ray(const dmnsn_raytrace_state *state, const dmnsn_light *light) { - dmnsn_vector x0 = dmnsn_line_point(state->intersection->ray, - state->intersection->t); - dmnsn_line shadow_ray = dmnsn_new_line(x0, dmnsn_vector_sub(light->x0, x0)); + dmnsn_line shadow_ray = dmnsn_new_line(state->r, + dmnsn_vector_sub(light->x0, state->r)); /* Add epsilon to avoid hitting ourselves with the shadow ray */ shadow_ray = dmnsn_line_add_epsilon(shadow_ray); @@ -329,7 +328,7 @@ dmnsn_raytrace_light_ray(const dmnsn_raytrace_state *state, if (dmnsn_vector_dot(shadow_ray.n, state->intersection->normal) < 0.0) return dmnsn_black; - dmnsn_color color = (*light->light_fn)(light, x0); + dmnsn_color color = (*light->light_fn)(light, state->r); unsigned int level = state->level; while (level) { @@ -378,9 +377,6 @@ dmnsn_raytrace_lighting(const dmnsn_raytrace_state *state) return illum; } - dmnsn_vector x0 = dmnsn_line_point(state->intersection->ray, - state->intersection->t); - const dmnsn_light *light; unsigned int i; @@ -392,7 +388,7 @@ dmnsn_raytrace_lighting(const dmnsn_raytrace_state *state) if (!dmnsn_color_is_black(light_color)) { if (state->scene->quality & DMNSN_RENDER_FINISH) { dmnsn_vector ray = dmnsn_vector_normalize( - dmnsn_vector_sub(light->x0, x0) + dmnsn_vector_sub(light->x0, state->r) ); dmnsn_vector normal = state->intersection->normal; dmnsn_vector viewer = dmnsn_vector_normalize( @@ -434,10 +430,7 @@ dmnsn_raytrace_reflection(const dmnsn_raytrace_state *state, dmnsn_color color) viewer ); - dmnsn_line refl_ray = dmnsn_new_line( - dmnsn_line_point(state->intersection->ray, state->intersection->t), - ray - ); + dmnsn_line refl_ray = dmnsn_new_line(state->r, ray); refl_ray = dmnsn_line_add_epsilon(refl_ray); dmnsn_raytrace_state recursive_state = *state; @@ -461,10 +454,7 @@ dmnsn_raytrace_translucency(const dmnsn_raytrace_state *state, trans = dmnsn_color_mul(1.0 - state->pigment.filter - state->pigment.trans, color); - dmnsn_line trans_ray = dmnsn_new_line( - dmnsn_line_point(state->intersection->ray, state->intersection->t), - state->intersection->ray.n - ); + dmnsn_line trans_ray = dmnsn_new_line(state->r, state->intersection->ray.n); trans_ray = dmnsn_line_add_epsilon(trans_ray); dmnsn_raytrace_state recursive_state = *state; @@ -489,6 +479,8 @@ dmnsn_raytrace_shoot(dmnsn_raytrace_state *state, dmnsn_line ray) dmnsn_color color = state->scene->background; if (intersection) { state->intersection = intersection; + state->r = dmnsn_line_point(state->intersection->ray, + state->intersection->t); /* Pigment */ state->pigment = dmnsn_black; -- cgit v1.2.3