static void vxo_rect_init()
{
float verts_f[NVERTS*2] = {-0.5f,-0.5f,
0.5f,-0.5f,
0.5f, 0.5f,
-0.5f, 0.5f};
uint32_t ind_i[NIDX] = {0,1,2,2,3,0};
float norms_f[NVERTS*3] = {0,0,1,
0,0,1,
0,0,1,
0,0,1};
points = vx_resc_copyf(verts_f, NVERTS*2);
normals = vx_resc_copyf(norms_f, NVERTS*3);
indices = vx_resc_copyui(ind_i, NIDX);
vx_resc_inc_ref(points); // hold on to these references until vx_global_destroy()
vx_resc_inc_ref(indices);
vx_resc_inc_ref(normals);
}
static void vxo_box_init()
{
// for GL_POINTS
float point_verts[NVERTS*3] =
{
-0.5f,-0.5f,-0.5f, // 0
-0.5f,+0.5f,-0.5f, // 1
+0.5f,+0.5f,-0.5f, // 2
+0.5f,-0.5f,-0.5f, // 3
-0.5f,-0.5f,+0.5f, // 4
-0.5f,+0.5f,+0.5f, // 5
+0.5f,+0.5f,+0.5f, // 6
+0.5f,-0.5f,+0.5f, // 7
};
// for GL_LINES
uint32_t line_idxs[N_LINE_IDX*2] =
{
0,1, 1,2, 2,3, 3,0, // bottom
4,5, 5,6, 6,7, 7,4, // top
0,4, 1,5, 2,6, 3,7 // sides
};
// for GL_TRIANGLES
// Note: we could reduce the amount of vertex data
// by using indices -- e.g. point 0 and 2 are listed twice with the
// same normal on the bottom face (would save us 16 vertices out of 48)
// each vertex is listed 6 times, has 3 coords
float tri_verts[N_TRI_VERT*3] =
{
// Bottom Face
+0.5f,+0.5f,-0.5f, // 2
-0.5f,-0.5f,-0.5f, // 0
-0.5f,+0.5f,-0.5f, // 1
-0.5f,-0.5f,-0.5f, // 0
+0.5f,+0.5f,-0.5f, // 2
+0.5f,-0.5f,-0.5f, // 3
// Top
-0.5f,+0.5f,+0.5f, // 5
-0.5f,-0.5f,+0.5f, // 4
+0.5f,+0.5f,+0.5f, // 6
+0.5f,+0.5f,+0.5f, // 6
-0.5f,-0.5f,+0.5f, // 4
+0.5f,-0.5f,+0.5f, // 7
// Front
+0.5f,+0.5f,+0.5f, // 6
+0.5f,-0.5f,+0.5f, // 7
+0.5f,-0.5f,-0.5f, // 3
+0.5f,+0.5f,+0.5f, // 6
+0.5f,-0.5f,-0.5f, // 3
+0.5f,+0.5f,-0.5f, // 2
// Back
-0.5f,-0.5f,+0.5f, // 4
-0.5f,+0.5f,+0.5f, // 5
-0.5f,+0.5f,-0.5f, // 1
-0.5f,-0.5f,+0.5f, // 4
-0.5f,+0.5f,-0.5f, // 1
-0.5f,-0.5f,-0.5f, // 0
// Right
+0.5f,-0.5f,+0.5f, // 7
-0.5f,-0.5f,+0.5f, // 4
-0.5f,-0.5f,-0.5f, // 0
+0.5f,-0.5f,+0.5f, // 7
-0.5f,-0.5f,-0.5f, // 0
+0.5f,-0.5f,-0.5f, // 3
// Left
-0.5f,+0.5f,+0.5f, // 5
+0.5f,+0.5f,+0.5f, // 6
+0.5f,+0.5f,-0.5f, // 2
-0.5f,+0.5f,+0.5f, // 5
+0.5f,+0.5f,-0.5f, // 2
-0.5f,+0.5f,-0.5f, // 1
};
float tri_norms[N_TRI_VERT*3] =
{
// Bottom
+0.0f,+0.0f,-1.0f,
+0.0f,+0.0f,-1.0f,
+0.0f,+0.0f,-1.0f,
+0.0f,+0.0f,-1.0f,
+0.0f,+0.0f,-1.0f,
+0.0f,+0.0f,-1.0f,
// Top
+0.0f,+0.0f,+1.0f,
+0.0f,+0.0f,+1.0f,
+0.0f,+0.0f,+1.0f,
+0.0f,+0.0f,+1.0f,
+0.0f,+0.0f,+1.0f,
+0.0f,+0.0f,+1.0f,
// Front
+1.0f,+0.0f,+0.0f,
+1.0f,+0.0f,+0.0f,
+1.0f,+0.0f,+0.0f,
+1.0f,+0.0f,+0.0f,
+1.0f,+0.0f,+0.0f,
+1.0f,+0.0f,+0.0f,
// Back
-1.0f,+0.0f,+0.0f,
-1.0f,+0.0f,+0.0f,
-1.0f,+0.0f,+0.0f,
-1.0f,+0.0f,+0.0f,
-1.0f,+0.0f,+0.0f,
-1.0f,+0.0f,+0.0f,
// Right
+0.0f,-1.0f,+0.0f,
+0.0f,-1.0f,+0.0f,
+0.0f,-1.0f,+0.0f,
+0.0f,-1.0f,+0.0f,
+0.0f,-1.0f,+0.0f,
+0.0f,-1.0f,+0.0f,
// Left
+0.0f,+1.0f,+0.0f,
+0.0f,+1.0f,+0.0f,
+0.0f,+1.0f,+0.0f,
+0.0f,+1.0f,+0.0f,
+0.0f,+1.0f,+0.0f,
+0.0f,+1.0f,+0.0f
};
// triangles in CCW when viewed from outside the box
/*
2,0,1,0,2,3, // bottom face
5,4,6,6,4,7, // top face
6,7,3,6,3,2, // front face
4,5,1,4,1,0, // back face
7,4,0,7,0,3, // right face
5,6,2,5,2,1 // left face
*/
vertex_points = vx_resc_copyf(point_verts, NVERTS*3);
line_indices = vx_resc_copyui(line_idxs, N_LINE_IDX*2);
tri_points = vx_resc_copyf(tri_verts, N_TRI_VERT*3);
tri_normals = vx_resc_copyf(tri_norms, N_TRI_VERT*3);
// hold on to these references until vx_global_destroy()
vx_resc_inc_ref(vertex_points);
vx_resc_inc_ref(line_indices);
vx_resc_inc_ref(tri_points);
vx_resc_inc_ref(tri_normals);
}
static void draw(state_t * state, vx_world_t * world)
{
if (1) {
vx_buffer_add_back(vx_world_get_buffer(world, "grid"),
vxo_grid());
vx_buffer_set_draw_order(vx_world_get_buffer(world, "grid"), -100);
vx_buffer_swap(vx_world_get_buffer(world, "grid"));
}
// Draw from the vx shape library
if (1) {
vx_buffer_add_back(vx_world_get_buffer(world, "fixed-cube"),
vxo_chain(vxo_mat_translate3(3.0,0,0),
vxo_mat_scale3(2,2,2),
/* vxo_box(vxo_mesh_style(vx_orange)))); */
vxo_box(vxo_mesh_style_fancy(vx_orange, vx_orange, vx_white, 1.0, 400.0, 2))));
vx_buffer_add_back(vx_world_get_buffer(world, "fixed-cube"),
vxo_chain(vxo_mat_translate3(0,3.0,0),
vxo_mat_scale3(1,1,1),
vxo_depth_test(0,
vxo_box(vxo_mesh_style_solid(vx_green)))));
vx_buffer_swap(vx_world_get_buffer(world, "fixed-cube"));
}
if (1) {
float Tr = .2;
float amb[] = {0.0,0.0,0.0};
float diff[] = {0.0,0.0,0.0};
float spec[] = {1.0,1.0,1.0};
float specularity = 1.0;
int type = 2;
vx_buffer_add_back(vx_world_get_buffer(world, "window"),
vxo_chain(vxo_mat_translate3(0,0,2.5),
vxo_mat_rotate_y(-M_PI/7),
vxo_mat_rotate_z(M_PI/5),
vxo_mat_rotate_x(M_PI/2),
vxo_mat_scale3(10,10,1),
vxo_rect(vxo_mesh_style_fancy(amb, diff, spec, Tr, specularity, type),
vxo_lines_style(vx_black,2))));
vx_buffer_swap(vx_world_get_buffer(world, "window"));
vx_buffer_set_draw_order(vx_world_get_buffer(world, "window"), 100);
}
if (1) {
// Draw a custom ellipse:
int npoints = 35;
float points[npoints*3];
for (int i = 0; i < npoints; i++) {
float angle = 2*M_PI*i/npoints;
float x = 5.0f*cosf(angle);
float y = 8.0f*sinf(angle);
float z = 0.0f;
points[3*i + 0] = x;
points[3*i + 1] = y;
points[3*i + 2] = z;
}
vx_buffer_add_back(vx_world_get_buffer(world, "ellipse"), vxo_lines(vx_resc_copyf (points, npoints*3),
npoints, GL_LINE_LOOP,
vxo_lines_style(vx_purple, 1.0f) ));
vx_buffer_swap(vx_world_get_buffer(world, "ellipse"));
}
if (1) {
vx_object_t *vt = vxo_text_create(VXO_TEXT_ANCHOR_TOP_RIGHT, "<<right,#0000ff>>Heads Up!\n");
vx_buffer_t *vb = vx_world_get_buffer(world, "text");
vx_buffer_add_back(vb, vxo_pix_coords(VX_ORIGIN_TOP_RIGHT,vt));
vx_buffer_swap(vb);
}
// Draw a texture
if (state->img != NULL){
image_u32_t * img = state->img;
vx_object_t * o3 = vxo_image_texflags(vx_resc_copyui(img->buf, img->stride*img->height),
img->width, img->height, img->stride,
GL_RGBA, VXO_IMAGE_FLIPY,
VX_TEX_MIN_FILTER | VX_TEX_MAG_FILTER);
// pack the image into the unit square
vx_buffer_t * vb = vx_world_get_buffer(world, "texture");
vx_buffer_add_back(vb,vxo_chain(
vxo_mat_scale(1.0/img->height),
vxo_mat_translate3(0, - img->height, 0),
o3));
vx_buffer_swap(vb);
}
}
