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base: wanp:e914cad0ddfb26b0992dc3659b136d4714ccc4de
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wanp:main
wanp:double
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compare: wanp:b0549612a99595aa5c8472270211100c5f0d0519
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wanp:main
wanp:double

2 Commits
e914cad0dd ... b0549612a9

Author SHA1 Message Date
veclavtalica
b0549612a9 /apps/demos/scenery: lock movement direction to a plane 2025-01-06 15:38:40 +03:00
veclavtalica
6463ac3dd7 /apps/demos/scenery: separate height_at(), position grass right 2025-01-06 15:34:12 +03:00
1 changed files with 37 additions and 24 deletions
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55
apps/demos/scenery/scenes/ingame.c
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@ -48,25 +48,16 @@ static void process_fly_mode(State *state) {
}
static void process_ground_mode(State *state) {
SceneIngame *scn = (SceneIngame *)state->scene;
DrawCameraFromPrincipalAxesResult dir_and_up =
draw_camera_from_principal_axes(scn->pos, (float)M_PI_2 * 0.8f, scn->roll, scn->pitch, scn->yaw);
const Vec3 right = m_vec_norm(m_vec_cross(dir_and_up.direction, dir_and_up.up));
const float speed = 0.18f; /* TODO: put this in a better place */
Vec3 target = scn->pos;
/* gravity */
{
static float height_at(SceneIngame *scn, Vec2 position) {
float height0, height1, height2, weight0, weight1, weight2;
height0 = heightmap[(int)HALF_TERRAIN_DISTANCE][(int)HALF_TERRAIN_DISTANCE];
height1 = heightmap[(int)HALF_TERRAIN_DISTANCE + 1][(int)HALF_TERRAIN_DISTANCE + 1];
int const x = (int)(HALF_TERRAIN_DISTANCE + (position.x - scn->pos.x));
int const y = (int)(HALF_TERRAIN_DISTANCE + (position.y - scn->pos.z));
Vec2 incell = { scn->pos.x - floorf(scn->pos.x), scn->pos.z - floorf(scn->pos.z) };
height0 = heightmap[x][y];
height1 = heightmap[x + 1][y + 1];
Vec2 incell = { position.x - floorf(position.x), position.y - floorf(position.y) };
/* who needs barycentric coordinates, am i right? */
weight0 = 1 / sqrtf(powf(incell.x, 2) + powf(incell.y, 2));
@ -75,21 +66,40 @@ static void process_ground_mode(State *state) {
/* find which triangle we're directly under */
/* for this manhattan distance is sufficient */
if (incell.x + (1 - incell.y) < (1 - incell.x) + incell.y) {
height2 = heightmap[(int)HALF_TERRAIN_DISTANCE][(int)HALF_TERRAIN_DISTANCE + 1];
height2 = heightmap[x][y + 1];
weight2 = 1 / sqrtf(powf(incell.x, 2) + powf(1 - incell.y, 2));
} else {
height2 = heightmap[(int)HALF_TERRAIN_DISTANCE + 1][(int)HALF_TERRAIN_DISTANCE];
height2 = heightmap[x + 1][y];
weight2 = 1 / sqrtf(powf(1 - incell.x, 2) + powf(incell.y, 2));
}
float height = (height0 * weight0 + height1 * weight1 + height2 * weight2) / (weight0 + weight1 + weight2);
return (height0 * weight0 + height1 * weight1 + height2 * weight2) / (weight0 + weight1 + weight2);
}
static void process_ground_mode(State *state) {
SceneIngame *scn = (SceneIngame *)state->scene;
DrawCameraFromPrincipalAxesResult dir_and_up =
draw_camera_from_principal_axes(scn->pos, (float)M_PI_2 * 0.8f, scn->roll, scn->pitch, scn->yaw);
dir_and_up.direction.y = 0;
dir_and_up.direction = vec3_norm(dir_and_up.direction);
const Vec3 right = m_vec_norm(m_vec_cross(dir_and_up.direction, dir_and_up.up));
const float speed = 0.18f; /* TODO: put this in a better place */
Vec3 target = scn->pos;
/* gravity */
{
float const height = height_at(scn, (Vec2){scn->pos.x, scn->pos.z});
if (target.y > height + PLAYER_HEIGHT)
target.y = target.y - 0.4f;
if (target.y < height + PLAYER_HEIGHT)
target.y = height + PLAYER_HEIGHT;
}
/* movement */
@ -159,7 +169,10 @@ static void draw_terrain(SceneIngame *scn) {
(Vec2){ 0, 0 },
(Vec2){ 0, 128 });
draw_billboard("/assets/grasses/10.png", (Vec3){ (float)x, d1 + 0.1f, (float)y }, (Vec2){0.3f, 0.3f}, (Color){255, 255, 255, 255}, true);
draw_billboard("/assets/grasses/10.png",
(Vec3){ (float)x, d0 + 0.15f, (float)y },
(Vec2){0.3f, 0.3f},
(Color){255, 255, 255, 255}, true);
}
}
}