Float4X4 MatrixRotationX(float r)
{
float sinR = SDL_sinf(r);
float cosR = SDL_cosf(r);
Float4X4 m;
SDL_zero(m);
m._11 = 1.0f;
m._22 = cosR;
m._23 = sinR;
m._32 = -sinR;
m._33 = cosR;
m._44 = 1.0f;
return m;
}
/*
* Simulates desktop's glRotatef. The matrix is returned in column-major
* order.
*/
static void
rotate_matrix(float angle, float x, float y, float z, float *r)
{
float radians, c, s, c1, u[3], length;
int i, j;
radians = (float)(angle * M_PI) / 180.0f;
c = SDL_cosf(radians);
s = SDL_sinf(radians);
c1 = 1.0f - SDL_cosf(radians);
length = (float)SDL_sqrt(x * x + y * y + z * z);
u[0] = x / length;
u[1] = y / length;
u[2] = z / length;
for (i = 0; i < 16; i++) {
r[i] = 0.0;
}
r[15] = 1.0;
for (i = 0; i < 3; i++) {
r[i * 4 + (i + 1) % 3] = u[(i + 2) % 3] * s;
r[i * 4 + (i + 2) % 3] = -u[(i + 1) % 3] * s;
}
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
r[i * 4 + j] += c1 * u[i] * u[j] + (i == j ? c : 0.0f);
}
}
}
void Player_Update(Player *player, Terrain *terrain)
{
check_input(player);
player->entity.rotY += player->turnSpeed * Time_GetFrameTime();
player->entity.position.x += SDL_sinf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
player->entity.position.z += SDL_cosf(toRadians(player->entity.rotY)) * player->speed * Time_GetFrameTime();
/*
player->verticalSpeed += GRAVITY * Time_GetFrameTime();
player->entity.position.y += player->verticalSpeed * Time_GetFrameTime();
*/
GLfloat terrainHeight = Terrain_GetHeightOfTerrain(terrain, player->entity.position.x, player->entity.position.z);
if(player->entity.position.y - 1.0f < terrainHeight) {
//player->entity.position.y = terrainHeight + 1.0f;
//player->verticalSpeed = 0.0f;
}
}
