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Continue city physics

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This commit is contained in:
Miloslav Číž 2019-06-20 02:03:46 +02:00
parent 504c664b82
commit 028de5c11a
1 changed files with 30 additions and 9 deletions
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39
programs/city.c
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@ -238,29 +238,40 @@ int main()
int16_t step = velocity * frameDiff; int16_t step = velocity * frameDiff;
int16_t stepFriction = 300 * frameDiff; int16_t stepFriction = 300 * frameDiff;
int16_t stepRotation = 200 * frameDiff * velocity / ((float) MAX_VELOCITY); int16_t stepRotation = 200 * frameDiff * S3L_abs(velocity) / ((float) MAX_VELOCITY);
int16_t stepVelocity = S3L_nonZero(1000 * frameDiff); int16_t stepVelocity = S3L_nonZero(1000 * frameDiff);
if (stepRotation == 0 && S3L_abs(velocity) >= 200)
stepRotation = 1;
if (velocity < 0)
stepRotation *= -1;
if (state[SDL_SCANCODE_LEFT]) if (state[SDL_SCANCODE_LEFT])
{
models[1].transform.rotation.y += stepRotation; models[1].transform.rotation.y += stepRotation;
models[1].transform.rotation.z = S3L_min(velocity / 64, models[1].transform.rotation.z + stepRotation);
}
else if (state[SDL_SCANCODE_RIGHT]) else if (state[SDL_SCANCODE_RIGHT])
{
models[1].transform.rotation.y -= stepRotation; models[1].transform.rotation.y -= stepRotation;
models[1].transform.rotation.z = S3L_max(-velocity / 64, models[1].transform.rotation.z - stepRotation);
}
else
models[1].transform.rotation.z = (models[1].transform.rotation.z * 3) / 4;
S3L_rotationToDirections(models[1].transform.rotation,S3L_FRACTIONS_PER_UNIT,&carDirection,0,0); S3L_rotationToDirections(models[1].transform.rotation,S3L_FRACTIONS_PER_UNIT,&carDirection,0,0);
S3L_Vec4 previousPos = models[1].transform.translation; S3L_Vec4 previousPos = models[1].transform.translation;
int16_t friction = 0;
if (state[SDL_SCANCODE_UP]) if (state[SDL_SCANCODE_UP])
velocity = S3L_min(MAX_VELOCITY,velocity + stepVelocity); velocity = S3L_min(MAX_VELOCITY,velocity + (velocity < 0 ? (2 * stepVelocity) : stepVelocity));
else if (state[SDL_SCANCODE_DOWN]) else if (state[SDL_SCANCODE_DOWN])
velocity = S3L_max(-MAX_VELOCITY,velocity - stepVelocity); velocity = S3L_max(-MAX_VELOCITY,velocity - (velocity > 0 ? (2 * stepVelocity) : stepVelocity));
else else
{ friction = 1;
if (velocity > 0)
velocity = S3L_max(0,velocity - stepFriction);
else
velocity = S3L_min(0,velocity + stepFriction);
}
models[1].transform.translation.x += (carDirection.x * step) / S3L_FRACTIONS_PER_UNIT; models[1].transform.translation.x += (carDirection.x * step) / S3L_FRACTIONS_PER_UNIT;
models[1].transform.translation.z += (carDirection.z * step) / S3L_FRACTIONS_PER_UNIT; models[1].transform.translation.z += (carDirection.z * step) / S3L_FRACTIONS_PER_UNIT;
@ -273,6 +284,8 @@ int main()
{ {
S3L_Vec4 newPos = models[1].transform.translation; S3L_Vec4 newPos = models[1].transform.translation;
newPos.x = previousPos.x; newPos.x = previousPos.x;
friction = 8;
if (collision(newPos)) if (collision(newPos))
{ {
@ -280,7 +293,10 @@ int main()
newPos.z = previousPos.z; newPos.z = previousPos.z;
if (collision(newPos)) if (collision(newPos))
{
newPos = previousPos; newPos = previousPos;
velocity = 0;
}
} }
models[1].transform.translation = newPos; models[1].transform.translation = newPos;
@ -297,6 +313,11 @@ int main()
} }
} }
if (velocity > 0)
velocity = S3L_max(0,velocity - stepFriction * friction);
else
velocity = S3L_min(0,velocity + stepFriction * friction);
scene.camera.transform.translation.x = scene.camera.transform.translation.x =
scene.models[1].transform.translation.x - carDirection.x; scene.models[1].transform.translation.x - carDirection.x;