void init(float winwidth, float winheight, float pixratio)
{
const Vector4 bgcolor = {0.937, 0.937, 0.93, 1.00};
parg_state_clearcolor(bgcolor);
parg_state_cullfaces(1);
parg_state_depthtest(1);
parg_shader_load_from_asset(SHADER_SIMPLE);
int* rawdata;
colorbuf = parg_buffer_slurp_asset(TEXTURE_COLOR, (void*) &rawdata);
int width = *rawdata++;
int height = *rawdata++;
int ncomps = *rawdata++;
parg_buffer_unlock(colorbuf);
colortex =
parg_texture_from_u8(colorbuf, width, height, ncomps, 3 * sizeof(int));
graybuf = parg_buffer_from_asset(BIN_ISLAND);
graytex = parg_texture_from_fp32(graybuf, IMGWIDTH, IMGHEIGHT, 1, 0);
const float h = 1.5f;
const float w = h * winwidth / winheight;
const float znear = 10;
const float zfar = 90;
projection = M4MakeFrustum(-w, w, -h, h, znear, zfar);
Point3 eye = {0, -50, 50};
Point3 target = {0, 0, 0};
Vector3 up = {0, 1, 0};
view = M4MakeLookAt(eye, target, up);
rectmesh = parg_mesh_rectangle(20, 20);
}
void init(float winwidth, float winheight, float pixratio)
{
parg_state_clearcolor((Vector4){gray, gray, gray, 1});
parg_state_depthtest(0);
parg_state_cullfaces(0);
parg_shader_load_from_asset(SHADER_SIMPLE);
float worldheight = worldwidth * sqrt(0.75);
parg_zcam_init(worldwidth, worldheight, fovy);
trimesh = parg_mesh_sierpinski(worldwidth, 10);
printf("%d triangles\n", parg_mesh_ntriangles(trimesh));
}
void init(float winwidth, float winheight, float pixratio)
{
parg_state_clearcolor((Vector4){gray, gray, gray, 1});
parg_state_depthtest(0);
parg_state_cullfaces(0);
parg_shader_load_from_asset(SHADER_ZOOMING);
palmstexture = parg_texture_from_asset(TEXTURE_PALMS);
int imgwidth, imgheight;
parg_texture_info(palmstexture, &imgwidth, &imgheight);
float worldheight = worldwidth * imgheight / imgwidth;
parg_zcam_init(worldwidth, worldheight, fovy);
rectmesh = parg_mesh_rectangle(worldwidth, worldheight);
}
void init(float winwidth, float winheight, float pixratio)
{
resolution = pixratio * winwidth;
par_shapes_mesh* shape;
shape = par_shapes_create_cylinder(30, 3);
float axis[3] = {1, 0, 0};
par_shapes_rotate(shape, PARG_PI * 0.5, axis);
cylinder = parg_mesh_from_shape(shape);
par_shapes_free_mesh(shape);
shape = par_shapes_create_plane(3, 3);
par_shapes_scale(shape, 4, 4, 1);
par_shapes_translate(shape, -2, -2, -1);
backdrop = parg_mesh_from_shape(shape);
par_shapes_free_mesh(shape);
kleingeo = parg_mesh_from_asset(M_KLEIN);
parg_mesh_send_to_gpu(kleingeo);
kleintex = parg_texture_from_asset_linear(T_KLEIN);
abstract = parg_texture_from_asset(T_ABSTRACT);
logo = parg_texture_from_asset(T_LOGO);
rust = parg_texture_from_asset(T_RUST);
billboard = parg_mesh_rectangle(1, 1);
reflection = parg_framebuffer_create_empty(
512, 512, PARG_FBO_LINEAR | PARG_FBO_ALPHA | PARG_FBO_DEPTH);
const Vector4 transparent = {0, 0, 0, 0};
parg_state_clearcolor(transparent);
parg_state_depthtest(1);
parg_state_cullfaces(1);
parg_shader_load_from_asset(S_SIMPLE);
const float h = 1.0f;
const float w = h * winwidth / winheight;
const float znear = 4;
const float zfar = 20;
projection = M4MakeFrustum(-w, w, -h, h, znear, zfar);
Point3 eye = {0, 1.8, 5};
Point3 target = {0, 0.7, 0};
Vector3 up = {0, 1, 0};
view = M4MakeLookAt(eye, target, up);
model = M4MakeIdentity();
}
void init(float winwidth, float winheight, float pixratio)
{
printf(
"Spacebar to toggle texture modes.\n"
"D to toggle auto-zooming demo mode.\n"
"G to toggle the slippy map grid.\n");
parg_state_clearcolor((Vector4){0.43, 0.61, 0.8, 1});
parg_state_cullfaces(1);
parg_state_depthtest(0);
parg_shader_load_from_asset(SHADER_DEFAULT);
parg_zcam_init(1, 1, fovy);
parg_zcam_set_position(0, 0, STARTZ);
ocean_texture = parg_texture_from_asset(TEXTURE_OCEAN);
paper_texture = parg_texture_from_asset(TEXTURE_PAPER);
// Decode the europe image.
int* rawdata;
parg_buffer* colorbuf =
parg_buffer_slurp_asset(TEXTURE_EUROPE, (void*) &rawdata);
int width = *rawdata++;
int height = *rawdata++;
int ncomps = *rawdata++;
parg_texture_fliprows(rawdata, width * ncomps, height);
// Sample the ocean color from one corner of the image.
int ocean_color = rawdata[0];
// Perform marching squares and generate a mesh.
par_msquares_meshlist* mlist =
par_msquares_color((parg_byte*) rawdata, width, height, 16, ocean_color,
4, PAR_MSQUARES_SWIZZLE | PAR_MSQUARES_DUAL | PAR_MSQUARES_HEIGHTS |
PAR_MSQUARES_SIMPLIFY);
par_msquares_mesh const* mesh;
mesh = par_msquares_get_mesh(mlist, 0);
landmass_mesh = parg_mesh_create(
mesh->points, mesh->npoints, mesh->triangles, mesh->ntriangles);
mesh = par_msquares_get_mesh(mlist, 1);
ocean_mesh = parg_mesh_create(
mesh->points, mesh->npoints, mesh->triangles, mesh->ntriangles);
parg_buffer_unlock(colorbuf);
par_msquares_free(mlist);
}
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);
}