void vr_render_brick(
VRState *state,
VRVolumeData *vd,
Brick *b,
int direction
)
{
int i;
Matrix RTTMat;
Coord cpt[8];
float cp[MAX_CLIP_PLANES][4];
/* Get vertices for brick */
get_brick_vertices(b, state, cpt, vd, RTTMat);
/* Restore texture coordinate space to range [0.0 1.0] */
glMatrixMode(GL_TEXTURE);
glLoadMatrixf((GLfloat *) RTTMat);
glMatrixMode(GL_MODELVIEW);
/* If slice mode, get clipping plane */
if (state->mode->sliceMode)
{
vr_define_clip_planes(state, cp);
}
/* Load brick into texture memory */
load_brick(state, vd, b);
/* Draw brick slices */
render_slices(b, state, cpt, direction);
if (state->mode->sliceMode)
{
glBlendFunc(GL_ONE, GL_ZERO);
/* Draw all clipping planes */
for (i = 0; i < state->planeData->nPlanes; i++)
{
/* Only draw plane if it is facing the viewer */
if (state->planeData->plane[i].facing == PLANE_FACING_TOWARDS)
{
/* Enable all clipping planes except the current one */
vr_enable_active_clip_planes(state, i);
/* Draw current plane */
render_plane(state, b, cpt, cp[i]);
/* Disable all clipping planes */
vr_disable_all_clip_planes(state);
}
}
/* Re-enable all clipping planes */
vr_enable_active_clip_planes(state, -1);
/* Restore blending for volume rendering */
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
}
// XXX: this is very close to tool_cube_iter.
static int tool_selection_iter(goxel_t *goxel, const inputs_t *inputs,
int state, const vec2_t *view_size,
bool inside)
{
extern const mat4_t FACES_MATS[6];
const bool down = inputs->mouse_down[0];
const bool up = !down;
int snaped = 0;
int face = -1;
vec3_t pos, normal;
plane_t face_plane;
box_t box;
uvec4b_t box_color = HEXCOLOR(0xffff00ff);
// See if we can snap on a selection face.
if (inside && !box_is_null(goxel->selection) &&
IS_IN(state, STATE_IDLE, STATE_SNAPED, STATE_SNAPED_FACE)) {
goxel->tool_snape_face = -1;
if (goxel_unproject_on_box(goxel, view_size, &inputs->mouse_pos,
&goxel->selection, &pos, &normal, &face)) {
goxel->tool_snape_face = face;
state = STATE_SNAPED_FACE;
}
}
if (!box_is_null(goxel->selection) && goxel->tool_snape_face != -1)
face_plane.mat = mat4_mul(goxel->selection.mat,
FACES_MATS[goxel->tool_snape_face]);
if (inside && face == -1)
snaped = goxel_unproject(goxel, view_size, &inputs->mouse_pos,
&pos, &normal);
if (snaped) {
pos.x = round(pos.x - 0.5) + 0.5;
pos.y = round(pos.y - 0.5) + 0.5;
pos.z = round(pos.z - 0.5) + 0.5;
}
if (state == STATE_IDLE) {
goxel->tool_t = 0;
goxel->tool_snape_face = -1;
if (snaped) state = STATE_SNAPED;
}
if (state == STATE_SNAPED) {
if (!snaped) return STATE_CANCEL;
goxel_set_help_text(goxel, "Click and drag to set selection.");
goxel->tool_start_pos = pos;
box = get_box(&goxel->tool_start_pos, &pos, &normal, 0,
&goxel->plane);
render_box(&goxel->rend, &box, false, &box_color, false);
if (down) {
state = STATE_PAINT;
goxel->painting = true;
}
}
if (state == STATE_PAINT) {
goxel_set_help_text(goxel, "Drag.");
goxel->selection = get_box(&goxel->tool_start_pos, &pos, &normal, 0,
&goxel->plane);
if (up) {
state = STATE_PAINT2;
goxel->tool_plane = plane_from_normal(pos, goxel->plane.u);
}
}
if (state == STATE_PAINT2) {
goxel_set_help_text(goxel, "Adjust height.");
render_plane(&goxel->rend, &goxel->tool_plane, &goxel->grid_color);
pos = vec3_add(goxel->tool_plane.p,
vec3_project(vec3_sub(pos, goxel->tool_plane.p),
goxel->plane.n));
goxel->selection = get_box(&goxel->tool_start_pos, &pos, &normal, 0,
&goxel->plane);
if (down) {
goxel->painting = false;
return STATE_WAIT_UP;
}
}
if (state == STATE_WAIT_UP) {
goxel->tool_plane = plane_null;
goxel->selection = box_get_bbox(goxel->selection);
return up ? STATE_IDLE : STATE_WAIT_UP;
}
if (IS_IN(state, STATE_SNAPED_FACE, STATE_MOVE_FACE))
goxel_set_help_text(goxel, "Drag to move face");
if (state == STATE_SNAPED_FACE) {
if (face == -1) return STATE_IDLE;
render_img(&goxel->rend, NULL, &face_plane.mat);
if (down) {
state = STATE_MOVE_FACE;
goxel->tool_plane = plane(pos, normal,
vec3_normalized(face_plane.u));
}
}
if (state == STATE_MOVE_FACE) {
if (up) return STATE_IDLE;
goxel_unproject_on_plane(goxel, view_size, &inputs->mouse_pos,
&goxel->tool_plane, &pos, &normal);
pos = vec3_add(goxel->tool_plane.p,
vec3_project(vec3_sub(pos, goxel->tool_plane.p),
vec3_normalized(face_plane.n)));
pos.x = round(pos.x);
pos.y = round(pos.y);
pos.z = round(pos.z);
goxel->selection = box_move_face(goxel->selection,
goxel->tool_snape_face, pos);
}
return state;
}
static int tool_cube_iter(goxel_t *goxel, const inputs_t *inputs, int state,
const vec2_t *view_size, bool inside)
{
const bool down = inputs->mouse_down[0];
const bool up = !down;
int snaped = 0;
vec3_t pos, normal;
box_t box;
uvec4b_t box_color = HEXCOLOR(0xffff00ff);
mesh_t *mesh = goxel->image->active_layer->mesh;
if (inside)
snaped = goxel_unproject(goxel, view_size, &inputs->mouse_pos,
&pos, &normal);
if (snaped) {
if ( snaped == SNAP_MESH && goxel->painter.op == OP_ADD &&
!goxel->snap_offset)
vec3_iadd(&pos, normal);
pos.x = round(pos.x - 0.5) + 0.5;
pos.y = round(pos.y - 0.5) + 0.5;
pos.z = round(pos.z - 0.5) + 0.5;
}
if (state == STATE_IDLE) {
goxel->tool_t = 0;
if (snaped) state = STATE_SNAPED;
}
if (state == STATE_SNAPED) {
if (goxel->tool_t == 0) {
goxel->tool_t = 1;
mesh_set(&goxel->tool_origin_mesh, mesh);
}
if (!snaped) return STATE_CANCEL;
goxel_set_help_text(goxel, "Click and drag to draw.");
goxel->tool_start_pos = pos;
box = get_box(&goxel->tool_start_pos, &pos, &normal, 0,
&goxel->plane);
mesh_set(&mesh, goxel->tool_origin_mesh);
mesh_op(mesh, &goxel->painter, &box);
render_box(&goxel->rend, &box, false, &box_color, false);
if (down) {
state = STATE_PAINT;
goxel->painting = true;
}
}
if (state == STATE_PAINT) {
goxel_set_help_text(goxel, "Drag.");
box = get_box(&goxel->tool_start_pos, &pos, &normal, 0, &goxel->plane);
render_box(&goxel->rend, &box, false, &box_color, false);
mesh_set(&mesh, goxel->tool_origin_mesh);
mesh_op(mesh, &goxel->painter, &box);
goxel_update_meshes(goxel, false);
if (up) {
state = STATE_PAINT2;
goxel->tool_plane = plane_from_normal(pos, goxel->plane.u);
}
}
if (state == STATE_PAINT2) {
goxel_set_help_text(goxel, "Adjust height.");
render_plane(&goxel->rend, &goxel->tool_plane, &goxel->grid_color);
pos = vec3_add(goxel->tool_plane.p,
vec3_project(vec3_sub(pos, goxel->tool_plane.p),
goxel->plane.n));
box = get_box(&goxel->tool_start_pos, &pos, &normal, 0,
&goxel->plane);
render_box(&goxel->rend, &box, false, &box_color, false);
mesh_set(&mesh, goxel->tool_origin_mesh);
mesh_op(mesh, &goxel->painter, &box);
goxel_update_meshes(goxel, false);
if (down) {
mesh_set(&mesh, goxel->tool_origin_mesh);
mesh_op(mesh, &goxel->painter, &box);
goxel_update_meshes(goxel, true);
goxel->painting = false;
image_history_push(goxel->image);
return STATE_WAIT_UP;
}
}
if (state == STATE_WAIT_UP) {
goxel->tool_plane = plane_null;
if (up) state = STATE_IDLE;
}
return state;
}
/*
* Initialization of VGA
*/
void vga_init(vidmem_vga_mode_t vga_mode)
{
load_mode(vga_mode);
/* load logo */
render_plane(&vga_logo);
}
