void draw()
{
DMatrix4 view, projection;
parg_zcam_dmatrices(&projection, &view);
DMatrix4 model = DM4MakeTranslation((DVector3){-0.5, -0.5, -1});
Matrix4 mvp = M4MakeFromDM4(DM4Mul(projection, DM4Mul(view, model)));
const Vector4 BLACK = {0, 0, 0, 1};
Vector2 mapsize = {1, 1};
parg_aar rect = parg_zcam_get_rectangle();
parg_tilerange tiles;
float slippyfract = parg_aar_to_tilerange(rect, mapsize, &tiles);
parg_aar slippyaar = parg_aar_from_tilename(tiles.mintile, mapsize);
Vector4* slippybox = (Vector4*) &slippyaar;
slippybox->z = 1.0 / (slippybox->z - slippybox->x);
slippybox->w = 1.0 / (slippybox->w - slippybox->y);
parg_draw_clear();
parg_shader_bind(P_OCEAN);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_uniform1i(U_SHOWGRID, showgrid);
parg_uniform4f(U_SLIPPYBOX, slippybox);
parg_uniform1f(U_SLIPPYFRACT, slippyfract);
parg_texture_bind(ocean_texture, 0);
parg_varray_bind(parg_mesh_index(ocean_mesh));
parg_varray_enable(
parg_mesh_coord(ocean_mesh), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_draw_triangles_u16(0, parg_mesh_ntriangles(ocean_mesh));
parg_shader_bind(P_SOLID);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_uniform4f(U_COLOR, &BLACK);
parg_varray_bind(parg_mesh_index(landmass_mesh));
parg_varray_enable(
parg_mesh_coord(landmass_mesh), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_draw_wireframe_triangles_u16(0, parg_mesh_ntriangles(landmass_mesh));
if (mode_highp) {
float x = parg_aar_width(rect) / fbsize.x;
float y = parg_aar_height(rect) / fbsize.y;
slippybox->z *= x;
slippybox->w *= y;
slippybox->x = (slippybox->x - rect.left) / x;
slippybox->y = (slippybox->y - rect.bottom) / y;
}
parg_shader_bind(mode_highp ? P_LANDMASS_FRAGCOORD : P_LANDMASS);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_uniform1i(U_SHOWGRID, showgrid);
parg_uniform4f(U_SLIPPYBOX, slippybox);
parg_uniform1f(U_SLIPPYFRACT, slippyfract);
parg_texture_bind(paper_texture, 0);
parg_draw_triangles_u16(0, parg_mesh_ntriangles(landmass_mesh));
}
void draw()
{
Matrix4 modelview = view;
Matrix4 mvp = M4Mul(projection, view);
// Draw the background.
parg_draw_clear();
parg_shader_bind(P_TEXTURE);
parg_texture_bind(abstract, 0);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(backdrop), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_varray_enable(parg_mesh_uv(backdrop), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(backdrop));
parg_draw_triangles_u16(0, parg_mesh_ntriangles(backdrop));
parg_varray_disable(A_TEXCOORD);
// Prep for the scene.
modelview = M4Mul(view, model);
mvp = M4Mul(projection, modelview);
parg_texture_bind(kleintex, 0);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(kleingeo), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_varray_enable(parg_mesh_uv(kleingeo), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(kleingeo));
// Draw each chart of the Klein bottle, skipping the podium disk.
int start = 0;
for (int i = 0; i < NCHARTS; i++) {
if (i != PODIUM_CHART) {
parg_draw_triangles_u16(start, CHARTS[i]);
}
start += CHARTS[i];
}
// Draw it again for the reflection.
parg_framebuffer_pushfbo(reflection, 0);
parg_draw_clear();
Matrix4 invert = M4MakeScale((Vector3){1, -1, 1});
parg_state_cullfaces(0);
Matrix4 flipped = M4Mul(model, invert);
mvp = M4Mul(projection, M4Mul(view, flipped));
parg_uniform_matrix4f(U_MVP, &mvp);
start = 0;
for (int i = 0; i < NCHARTS; i++) {
if (i != PODIUM_CHART) {
parg_draw_triangles_u16(start, CHARTS[i]);
}
start += CHARTS[i];
}
mvp = M4Mul(projection, modelview);
parg_state_cullfaces(1);
parg_framebuffer_popfbo();
// Draw the podium.
parg_shader_bind(P_PODIUM);
parg_texture_bind(rust, 1);
parg_framebuffer_bindtex(reflection, 2);
parg_uniform1i(U_RUST, 1);
parg_uniform1i(U_REFLECTION, 2);
parg_uniform2f(U_RESOLUTION, resolution, resolution);
parg_uniform_matrix4f(U_MVP, &mvp);
start = 0;
for (int i = 0; i < NCHARTS; i++) {
if (i == PODIUM_CHART) {
parg_draw_triangles_u16(start, CHARTS[i]);
}
start += CHARTS[i];
}
parg_varray_disable(A_TEXCOORD);
// Draw the walls of the cylinder.
#if CYLINDER
parg_shader_bind(P_CYLINDER);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(cylinder), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(cylinder));
parg_draw_triangles_u16(0, parg_mesh_ntriangles(cylinder));
#endif
// Draw the logo billboard.
parg_state_blending(1);
parg_state_depthtest(0);
parg_shader_bind(P_LOGO);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_texture_bind(logo, 0);
parg_varray_enable(
parg_mesh_coord(billboard), A_POSITION, 2, PARG_FLOAT, 0, 0);
parg_varray_enable(
parg_mesh_coord(billboard), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_draw_one_quad();
parg_varray_disable(A_TEXCOORD);
parg_state_blending(0);
parg_state_depthtest(1);
}
void draw()
{
int mesh = 0, multi = 0, meshcolor = 0;
switch (state) {
case STATE_GRAY_SOURCE:
parg_shader_bind(P_GRAY);
parg_texture_bind(graytex, 0);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_COLOR_IH:
mesh = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_COLOR_DHSCSI:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_MULTI_RGBA:
case STATE_MULTI_RGB:
case STATE_MULTI_DIAGRAM:
meshcolor = mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.25);
break;
case STATE_COLOR_DEFAULT:
case STATE_GRAY_DEFAULT:
case STATE_GRAY_SIMPLIFY:
case STATE_GRAY_INVERT:
case STATE_GRAY_HEIGHTS:
mesh = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_GRAY_MULTI:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_GRAY_DUAL:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_GRAY_DHS:
case STATE_GRAY_DHSC:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 0.5);
break;
case STATE_COLOR_SOURCE:
parg_texture_bind(colortex, 0);
parg_shader_bind(P_COLOR);
parg_uniform1f(U_ZSCALE, 1);
break;
default:
break;
}
if (mesh) {
for (int i = 0; i < sizeof(trimesh) / sizeof(trimesh[0]); i++) {
parg_mesh_free(trimesh[i]);
}
memset(trimesh, 0, sizeof(trimesh));
create_mesh();
}
Matrix4 model;
if (mesh) {
model = M4MakeScale(V3MakeFromElems(20, 20, 10));
model = M4Mul(M4MakeTranslation(V3MakeFromElems(-10, -10, 0)), model);
} else {
model = M4MakeIdentity();
}
Matrix4 modelview = M4Mul(view, model);
Matrix4 mvp = M4Mul(projection, modelview);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_draw_clear();
if (mesh) {
Vector4 colors[3];
colors[0] = (Vector4){0, 0.6, 0.9, 1};
colors[1] = (Vector4){0, 0.9, 0.6, 1};
colors[2] = (Vector4){0.9, 0.6, 0, 1};
Vector4 black = {0, 0, 0, 1.0};
for (int imesh = 0; imesh < nmeshes; imesh++) {
parg_varray_enable(parg_mesh_coord(trimesh[imesh]), A_POSITION, 3,
PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(trimesh[imesh]));
if (meshcolor) {
unsigned int b = meshcolors[imesh] & 0xff;
unsigned int g = (meshcolors[imesh] >> 8) & 0xff;
unsigned int r = (meshcolors[imesh] >> 16) & 0xff;
unsigned int a = (meshcolors[imesh] >> 24) & 0xff;
Vector4 color;
color.x = r / 255.0f;
color.y = g / 255.0f;
color.z = b / 255.0f;
color.w = a / 255.0f;
parg_uniform4f(U_COLOR, &color);
} else {
parg_uniform4f(U_COLOR, &colors[imesh]);
}
parg_draw_triangles_u16(0, parg_mesh_ntriangles(trimesh[imesh]));
parg_uniform4f(U_COLOR, &black);
parg_draw_wireframe_triangles_u16(
0, parg_mesh_ntriangles(trimesh[imesh]));
}
} else {