libretro/scenewalker-libretro
1
0
Fork 0
mirror of https://github.com/libretro/scenewalker-libretro.git synced 2024-11-27 01:50:33 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fixup jittery edge handling.

Browse Source
This commit is contained in:
Themaister 2013-05-15 00:00:43 +02:00
parent 0685303a4a
commit 3adb68448b
1 changed files with 39 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
libretro.cpp
View File

@ -150,6 +150,7 @@ void retro_set_video_refresh(retro_video_refresh_t cb)
video_cb = cb;
}
// Probably not the most efficient way to do collision handling ... :)
static bool inside_triangle(const Triangle& tri, const vec3& pos)
{
vec3 real_normal = -tri.normal;
@ -172,6 +173,36 @@ static bool inside_triangle(const Triangle& tri, const vec3& pos)
return true;
}
static void wall_hug_detection(vec3& player_pos)
{
float min_dist = 1.0f;
const Triangle *closest_triangle_hug = 0;
for (unsigned i = 0; i < triangles.size(); i++)
{
const Triangle& tri = triangles[i];
float plane_dist = tri.n0 - dot(player_pos, tri.normal);
// Might be hugging too close.
if (plane_dist >= 0.0f && plane_dist < min_dist)
{
vec3 projected_pos = player_pos + tri.normal * vec3(plane_dist);
if (inside_triangle(tri, projected_pos))
{
min_dist = plane_dist;
closest_triangle_hug = &tri;
}
}
}
if (closest_triangle_hug)
{
retro_stderr_print("Fixup hugging: Dist: %.6f.\n", min_dist);
// Push player out.
player_pos += vec3(min_dist - 1.0f) * closest_triangle_hug->normal;
}
}
static void collision_detection(vec3& player_pos, vec3& velocity)
{
if (velocity == vec3(0.0))
@ -180,9 +211,6 @@ static void collision_detection(vec3& player_pos, vec3& velocity)
float min_time = 1.0f;
const Triangle *closest_triangle = 0;
float min_dist = 1.0f;
const Triangle *closest_triangle_hug = 0;
for (unsigned i = 0; i < triangles.size(); i++)
{
const Triangle& tri = triangles[i];
@ -190,7 +218,7 @@ static void collision_detection(vec3& player_pos, vec3& velocity)
float plane_dist = tri.n0 - dot(player_pos, tri.normal);
float towards_plane_v = dot(velocity, tri.normal);
if (towards_plane_v > 0.0001f) // We're moving towards the plane.
if (towards_plane_v > 0.00001f) // We're moving towards the plane.
{
float ticks_to_hit = (plane_dist - 1.0f) / towards_plane_v;
// We'll hit the plane in this frame.
@ -205,16 +233,6 @@ static void collision_detection(vec3& player_pos, vec3& velocity)
}
}
// Might be hugging too close.
if (plane_dist >= 0.0f && plane_dist < min_dist)
{
vec3 projected_pos = player_pos + tri.normal * vec3(plane_dist);
if (inside_triangle(tri, projected_pos))
{
min_dist = plane_dist;
closest_triangle_hug = &tri;
}
}
}
if (closest_triangle)
@ -223,14 +241,13 @@ static void collision_detection(vec3& player_pos, vec3& velocity)
player_pos += vec3(min_time) * velocity;
// Make velocity vector parallel with plane.
velocity -= vec3(dot(velocity, closest_triangle->a) / closest_triangle->n0) * closest_triangle->normal;
}
velocity -= vec3(dot(velocity, closest_triangle->normal)) * closest_triangle->normal;
retro_stderr_print("Fixup V: %.6f, %.6f, %.6f\n", velocity[0], velocity[1], velocity[2]);
if (closest_triangle_hug)
{
// Push player out.
player_pos += vec3(min_dist - 1.0f) * closest_triangle_hug->normal;
player_pos += velocity * vec3(1.0f - min_time); // Used up some time.
}
else
player_pos += velocity;
}
static void handle_input()
@ -283,7 +300,7 @@ static void handle_input()
right_walk_dir * vec3(analog_x * 0.000005f);
collision_detection(player_pos, velocity);
player_pos += velocity;
wall_hug_detection(player_pos);
static vec3 gravity;
static bool can_jump;
@ -297,7 +314,7 @@ static void handle_input()
vec3 old_gravity = gravity;
collision_detection(player_pos, gravity);
player_pos += gravity;
wall_hug_detection(player_pos);
if (old_gravity != gravity)
{