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Agila Forge Importer committed 2026-07-13 15:20:32 +00:00
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tools/v/examples/sokol/02_cubes_glsl/cube_glsl.glsl
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//------------------------------------------------------------------------------
// Shader code for texcube-sapp sample.
//
// NOTE: This source file also uses the '#pragma sokol' form of the
// custom tags.
//------------------------------------------------------------------------------
//#pragma sokol @ctype mat4 my_mat4
#pragma sokol @vs vs
uniform vs_params {
mat4 mvp;
};
in vec4 pos;
in vec4 color0;
in vec2 texcoord0;
out vec4 color;
out vec2 uv;
void main() {
gl_Position = mvp * pos;
color = color0;
uv = texcoord0;
}
#pragma sokol @end
#pragma sokol @fs fs
uniform texture2D tex;
uniform sampler smp;
uniform fs_params {
vec2 text_res;
float iTime;
};
in vec4 color;
in vec2 uv;
out vec4 frag_color;
//*********************************************************
// RAY TRACE
// original code from: https://www.shadertoy.com/view/ldS3DW
//*********************************************************
float sphere(vec3 ray, vec3 dir, vec3 center, float radius)
{
vec3 rc = ray-center;
float c = dot(rc, rc) - (radius*radius);
float b = dot(dir, rc);
float d = b*b - c;
float t = -b - sqrt(abs(d));
float st = step(0.0, min(t,d));
return mix(-1.0, t, st);
}
vec3 background(float t, vec3 rd)
{
vec3 light = normalize(vec3(sin(t), 0.6, cos(t)));
float sun = max(0.0, dot(rd, light));
float sky = max(0.0, dot(rd, vec3(0.0, 1.0, 0.0)));
float ground = max(0.0, -dot(rd, vec3(0.0, 1.0, 0.0)));
return (pow(sun, 256.0)+0.2*pow(sun, 2.0))*vec3(2.0, 1.6, 1.0) +
pow(ground, 0.5)*vec3(0.4, 0.3, 0.2) +
pow(sky, 1.0)*vec3(0.5, 0.6, 0.7);
}
vec4 mainImage(vec2 fragCoord)
{
vec2 uv = (fragCoord-vec2(0.4,0.4))*2.0;
//vec2 uv = (-1.0 + 2.0*fc.xy / text_res.xy) * vec2(text_res.x/text_res.y, 1.0);
vec3 ro = vec3(0.0, 0.0, -3.0);
vec3 rd = normalize(vec3(uv, 1.0));
vec3 p = vec3(0.0, 0.0, 0.0);
float t = sphere(ro, rd, p, 1.0);
vec3 nml = normalize(p - (ro+rd*t));
vec3 bgCol = background(iTime, rd);
rd = reflect(rd, nml);
vec3 col = background(iTime, rd) * vec3(0.9, 0.8, 1.0);
vec4 fragColor = vec4( mix(bgCol, col, step(0.0, t)), 1.0 );
return fragColor;
}
//*********************************************************
//*********************************************************
void main() {
vec4 c = color;
vec4 txt = texture(sampler2D(tex, smp), uv/4.0);
c = txt * c;
vec4 col_ray = mainImage(uv);
float txt_mix = mod(iTime,5);
frag_color = c*txt_mix*0.1 + col_ray ;
}
#pragma sokol @end
#pragma sokol @program cube vs fs
tools/v/examples/sokol/02_cubes_glsl/cube_glsl.v
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// vtest build: misc-tooling // needs .h files that are produced by `v shader`
/**********************************************************************
*
* Sokol 3d cube demo
*
* Copyright (c) 2021 Dario Deledda. All rights reserved.
* Use of this source code is governed by an MIT license
* that can be found in the LICENSE file.
*
* HOW TO COMPILE SHADERS:
* Run `v shader .` in this directory to compile the shaders.
* For more info and help with shader compilation see `docs.md` and `v help shader`.
*
* TODO:
* - add instancing
**********************************************************************/
import gg
// import math
import sokol.sapp
import sokol.gfx
import sokol.sgl
import time
import gg.m4
// GLSL Include and functions
#include "@VMODROOT/cube_glsl.h" # It should be generated with `v shader .` (see the instructions at the top of this file)
fn C.cube_shader_desc(gfx.Backend) &gfx.ShaderDesc
const win_width = 800
const win_height = 800
const bg_color = gg.white
struct App {
mut:
gg &gg.Context = unsafe { nil }
pip_3d sgl.Pipeline
texture gfx.Image
sampler gfx.Sampler
init_flag bool
frame_count int
mouse_x int = -1
mouse_y int = -1
// glsl
cube_pip_glsl gfx.Pipeline
cube_bind gfx.Bindings
// time
ticks i64
}
/******************************************************************************
*
* Texture functions
*
******************************************************************************/
fn create_texture(w int, h int, buf &u8) (gfx.Image, gfx.Sampler) {
sz := w * h * 4
mut img_desc := gfx.ImageDesc{
width: w
height: h
num_mipmaps: 0
// usage: .dynamic
label: &char(unsafe { nil })
d3d11_texture: 0
}
// comment if .dynamic is enabled
img_desc.data.subimage[0][0] = gfx.Range{
ptr: buf
size: usize(sz)
}
sg_img := gfx.make_image(&img_desc)
mut smp_desc := gfx.SamplerDesc{
min_filter: .linear
mag_filter: .linear
wrap_u: .clamp_to_edge
wrap_v: .clamp_to_edge
}
sg_smp := gfx.make_sampler(&smp_desc)
return sg_img, sg_smp
}
fn destroy_texture(sg_img gfx.Image) {
gfx.destroy_image(sg_img)
}
// Use only if usage: .dynamic is enabled
fn update_text_texture(sg_img gfx.Image, w int, h int, buf &u8) {
sz := w * h * 4
mut tmp_sbc := gfx.ImageData{}
tmp_sbc.subimage[0][0] = gfx.Range{
ptr: buf
size: usize(sz)
}
gfx.update_image(sg_img, &tmp_sbc)
}
/******************************************************************************
*
* Draw functions
*
******************************************************************************/
fn draw_triangle() {
sgl.defaults()
sgl.begin_triangles()
{
// vfmt off
sgl.v2f_c3b( 0.0, 0.5, 255, 0 , 0 )
sgl.v2f_c3b(-0.5, -0.5, 0, 0 , 255)
sgl.v2f_c3b( 0.5, -0.5, 0, 255, 0 )
// vfmt on
}
sgl.end()
}
// vertex specification for a cube with colored sides and texture coords
fn cube() {
sgl.begin_quads()
{
// vfmt off
sgl.c3f(1.0, 0.0, 0.0) // edge color
// edge coordinates
// x,y,z, texture cord: u,v
sgl.v3f_t2f(-1.0, 1.0, -1.0, -1.0, 1.0)
sgl.v3f_t2f( 1.0, 1.0, -1.0, 1.0, 1.0)
sgl.v3f_t2f( 1.0, -1.0, -1.0, 1.0, -1.0)
sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0)
sgl.c3f(0.0, 1.0, 0.0)
sgl.v3f_t2f(-1.0, -1.0, 1.0, -1.0, 1.0)
sgl.v3f_t2f( 1.0, -1.0, 1.0, 1.0, 1.0)
sgl.v3f_t2f( 1.0, 1.0, 1.0, 1.0, -1.0)
sgl.v3f_t2f(-1.0, 1.0, 1.0, -1.0, -1.0)
sgl.c3f(0.0, 0.0, 1.0)
sgl.v3f_t2f(-1.0, -1.0, 1.0, -1.0, 1.0)
sgl.v3f_t2f(-1.0, 1.0, 1.0, 1.0, 1.0)
sgl.v3f_t2f(-1.0, 1.0, -1.0, 1.0, -1.0)
sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0)
sgl.c3f(1.0, 0.5, 0.0)
sgl.v3f_t2f(1.0, -1.0, 1.0, -1.0, 1.0)
sgl.v3f_t2f(1.0, -1.0, -1.0, 1.0, 1.0)
sgl.v3f_t2f(1.0, 1.0, -1.0, 1.0, -1.0)
sgl.v3f_t2f(1.0, 1.0, 1.0, -1.0, -1.0)
sgl.c3f(0.0, 0.5, 1.0)
sgl.v3f_t2f( 1.0, -1.0, -1.0, -1.0, 1.0)
sgl.v3f_t2f( 1.0, -1.0, 1.0, 1.0, 1.0)
sgl.v3f_t2f(-1.0, -1.0, 1.0, 1.0, -1.0)
sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0)
sgl.c3f(1.0, 0.0, 0.5)
sgl.v3f_t2f(-1.0, 1.0, -1.0, -1.0, 1.0)
sgl.v3f_t2f(-1.0, 1.0, 1.0, 1.0, 1.0)
sgl.v3f_t2f( 1.0, 1.0, 1.0, 1.0, -1.0)
sgl.v3f_t2f( 1.0, 1.0, -1.0, -1.0, -1.0)
// vfmt on
}
sgl.end()
}
fn draw_cubes(app App) {
rot := [f32(1.0) * (app.frame_count % 360), 0.5 * f32(app.frame_count % 360)]
// rot := [f32(app.mouse_x), f32(app.mouse_y)]
sgl.defaults()
sgl.load_pipeline(app.pip_3d)
sgl.matrix_mode_projection()
sgl.perspective(sgl.rad(45.0), 1.0, 0.1, 100.0)
sgl.matrix_mode_modelview()
sgl.translate(0.0, 0.0, -12.0)
sgl.rotate(sgl.rad(rot[0]), 1.0, 0.0, 0.0)
sgl.rotate(sgl.rad(rot[1]), 0.0, 1.0, 0.0)
cube()
sgl.push_matrix()
{
sgl.translate(0.0, 0.0, 3.0)
sgl.scale(0.5, 0.5, 0.5)
sgl.rotate(-2.0 * sgl.rad(rot[0]), 1.0, 0.0, 0.0)
sgl.rotate(-2.0 * sgl.rad(rot[1]), 0.0, 1.0, 0.0)
cube()
sgl.push_matrix()
{
sgl.translate(0.0, 0.0, 3.0)
sgl.scale(0.5, 0.5, 0.5)
// vfmt off
sgl.rotate(-3.0 * sgl.rad(2 * rot[0]), 1.0, 0.0, 0.0)
sgl.rotate( 3.0 * sgl.rad(2 * rot[1]), 0.0, 0.0, 1.0)
// vfmt on
cube()
}
sgl.pop_matrix()
}
sgl.pop_matrix()
}
fn cube_texture(r f32, g f32, b f32) {
sgl.begin_quads()
{
sgl.c3f(r, g, b) // edge color
// edge coord
// x,y,z, texture cord: u,v
// vfmt off
sgl.v3f_t2f(-1.0, 1.0, -1.0, 0.0 , 0.25)
sgl.v3f_t2f( 1.0, 1.0, -1.0, 0.25, 0.25)
sgl.v3f_t2f( 1.0, -1.0, -1.0, 0.25, 0.0 )
sgl.v3f_t2f(-1.0, -1.0, -1.0, 0.0 , 0.0 )
sgl.c3f(r, g, b)
sgl.v3f_t2f(-1.0, -1.0, 1.0, 0.0 , 0.25)
sgl.v3f_t2f( 1.0, -1.0, 1.0, 0.25, 0.25)
sgl.v3f_t2f( 1.0, 1.0, 1.0, 0.25, 0.0 )
sgl.v3f_t2f(-1.0, 1.0, 1.0, 0.0 , 0.0 )
sgl.c3f(r, g, b)
sgl.v3f_t2f(-1.0, -1.0, 1.0, 0.0 , 0.25)
sgl.v3f_t2f(-1.0, 1.0, 1.0, 0.25, 0.25)
sgl.v3f_t2f(-1.0, 1.0, -1.0, 0.25, 0.0 )
sgl.v3f_t2f(-1.0, -1.0, -1.0, 0.0 , 0.0 )
sgl.c3f(r, g, b)
sgl.v3f_t2f(1.0, -1.0, 1.0, 0.0 , 0.25)
sgl.v3f_t2f(1.0, -1.0, -1.0, 0.25, 0.25)
sgl.v3f_t2f(1.0, 1.0, -1.0, 0.25, 0.0 )
sgl.v3f_t2f(1.0, 1.0, 1.0, 0.0 , 0.0 )
sgl.c3f(r, g, b)
sgl.v3f_t2f( 1.0, -1.0, -1.0, 0.0 , 0.25)
sgl.v3f_t2f( 1.0, -1.0, 1.0, 0.25, 0.25)
sgl.v3f_t2f(-1.0, -1.0, 1.0, 0.25, 0.0 )
sgl.v3f_t2f(-1.0, -1.0, -1.0, 0.0 , 0.0 )
sgl.c3f(r, g, b)
sgl.v3f_t2f(-1.0, 1.0, -1.0, 0.0 , 0.25)
sgl.v3f_t2f(-1.0, 1.0, 1.0, 0.25, 0.25)
sgl.v3f_t2f( 1.0, 1.0, 1.0, 0.25, 0.0 )
sgl.v3f_t2f( 1.0, 1.0, -1.0, 0.0 , 0.0 )
// vfmt on
}
sgl.end()
}
/*
Cube vertex buffer with packed vertex formats for color and texture coords.
Note that a vertex format which must be portable across all
backends must only use the normalized integer formats
(BYTE4N, UBYTE4N, SHORT2N, SHORT4N), which can be converted
to floating point formats in the vertex shader inputs.
The reason is that D3D11 cannot convert from non-normalized
formats to floating point inputs (only to integer inputs),
and WebGL2 / GLES2 don't support integer vertex shader inputs.
*/
struct Vertex_t {
x f32
y f32
z f32
color u32
// u u16
// v u16
u f32
v f32
}
fn init_cube_glsl(mut app App) {
// cube vertex buffer
// d := u16(32767/8) // for compatibility with D3D11, 32767 stand for 1
d := f32(1.0) // 0.05)
c := u32(0xFFFFFF_FF) // color RGBA8
// vfmt off
vertices := [
// Face 0
Vertex_t{-1.0, -1.0, -1.0, c, 0, 0},
Vertex_t{ 1.0, -1.0, -1.0, c, d, 0},
Vertex_t{ 1.0, 1.0, -1.0, c, d, d},
Vertex_t{-1.0, 1.0, -1.0, c, 0, d},
// Face 1
Vertex_t{-1.0, -1.0, 1.0, c, 0, 0},
Vertex_t{ 1.0, -1.0, 1.0, c, d, 0},
Vertex_t{ 1.0, 1.0, 1.0, c, d, d},
Vertex_t{-1.0, 1.0, 1.0, c, 0, d},
// Face 2
Vertex_t{-1.0, -1.0, -1.0, c, 0, 0},
Vertex_t{-1.0, 1.0, -1.0, c, d, 0},
Vertex_t{-1.0, 1.0, 1.0, c, d, d},
Vertex_t{-1.0, -1.0, 1.0, c, 0, d},
// Face 3
Vertex_t{ 1.0, -1.0, -1.0, c, 0, 0},
Vertex_t{ 1.0, 1.0, -1.0, c, d, 0},
Vertex_t{ 1.0, 1.0, 1.0, c, d, d},
Vertex_t{ 1.0, -1.0, 1.0, c, 0, d},
// Face 4
Vertex_t{-1.0, -1.0, -1.0, c, 0, 0},
Vertex_t{-1.0, -1.0, 1.0, c, d, 0},
Vertex_t{ 1.0, -1.0, 1.0, c, d, d},
Vertex_t{ 1.0, -1.0, -1.0, c, 0, d},
// Face 5
Vertex_t{-1.0, 1.0, -1.0, c, 0, 0},
Vertex_t{-1.0, 1.0, 1.0, c, d, 0},
Vertex_t{ 1.0, 1.0, 1.0, c, d, d},
Vertex_t{ 1.0, 1.0, -1.0, c, 0, d},
]
// vfmt on
mut vert_buffer_desc := gfx.BufferDesc{
label: c'cube-vertices'
}
unsafe { vmemset(&vert_buffer_desc, 0, int(sizeof(vert_buffer_desc))) }
vert_buffer_desc.size = usize(vertices.len * int(sizeof(Vertex_t)))
vert_buffer_desc.data = gfx.Range{
ptr: vertices.data
size: usize(vertices.len * int(sizeof(Vertex_t)))
}
vert_buffer_desc.type = .vertexbuffer
// vert_buffer_desc.usage = .immutable
vbuf := gfx.make_buffer(&vert_buffer_desc)
// create an index buffer for the cube
// vfmt off
indices := [
u16(0), 1, 2, 0, 2, 3,
6, 5, 4, 7, 6, 4,
8, 9, 10, 8, 10, 11,
14, 13, 12, 15, 14, 12,
16, 17, 18, 16, 18, 19,
22, 21, 20, 23, 22, 20,
]
// vfmt on
mut index_buffer_desc := gfx.BufferDesc{
label: c'cube-indices'
}
unsafe { vmemset(&index_buffer_desc, 0, int(sizeof(index_buffer_desc))) }
index_buffer_desc.size = usize(indices.len * int(sizeof(u16)))
index_buffer_desc.data = gfx.Range{
ptr: indices.data
size: usize(indices.len * int(sizeof(u16)))
}
index_buffer_desc.type = .indexbuffer
ibuf := gfx.make_buffer(&index_buffer_desc)
// create shader
shader := gfx.make_shader(voidptr(C.cube_shader_desc(C.sg_query_backend())))
mut pipdesc := gfx.PipelineDesc{}
unsafe { vmemset(&pipdesc, 0, int(sizeof(pipdesc))) }
pipdesc.layout.buffers[0].stride = int(sizeof(Vertex_t))
// the constants [C.ATTR_vs_pos, C.ATTR_vs_color0, C.ATTR_vs_texcoord0] are generated bysokol-shdc
pipdesc.layout.attrs[C.ATTR_vs_pos].format = .float3 // x,y,z as f32
pipdesc.layout.attrs[C.ATTR_vs_color0].format = .ubyte4n // color as u32
pipdesc.layout.attrs[C.ATTR_vs_texcoord0].format = .float2 // u,v as f32
// pipdesc.layout.attrs[C.ATTR_vs_texcoord0].format = .short2n // u,v as u16
pipdesc.shader = shader
pipdesc.index_type = .uint16
pipdesc.depth = gfx.DepthState{
write_enabled: true
compare: .less_equal
}
pipdesc.cull_mode = .back
pipdesc.label = c'glsl_shader pipeline'
app.cube_bind.vertex_buffers[0] = vbuf
app.cube_bind.index_buffer = ibuf
app.cube_bind.fs.images[C.SLOT_tex] = app.texture
app.cube_bind.fs.samplers[C.SLOT_smp] = app.sampler
app.cube_pip_glsl = gfx.make_pipeline(&pipdesc)
println('GLSL init DONE!')
}
fn draw_cube_glsl(app App) {
if app.init_flag == false {
return
}
// clear
ws := gg.window_size_real_pixels()
mut color_action := gfx.ColorAttachmentAction{
load_action: unsafe { gfx.LoadAction(C.SG_LOADACTION_DONTCARE) } // C.SG_ACTION_CLEAR)
clear_value: gfx.Color{
r: 1.0
g: 1.0
b: 1.0
a: 1.0
}
}
mut pass_action := gfx.PassAction{}
pass_action.colors[0] = color_action
pass := sapp.create_default_pass(pass_action)
gfx.begin_pass(&pass)
{
rot := [f32(app.mouse_y), f32(app.mouse_x)]
// ratio := f32(ws.width)/ws.height
dw := f32(ws.width / 2)
dh := f32(ws.height / 2)
tr_matrix := m4.calc_tr_matrices(dw, dh, rot[0], rot[1], 2.0)
gfx.apply_viewport(ws.width / 2, 0, ws.width / 2, ws.height / 2, true)
// apply the pipeline and bindings
gfx.apply_pipeline(app.cube_pip_glsl)
gfx.apply_bindings(app.cube_bind)
// Uniforms:
// passing the view matrix as uniform
// res is a 4x4 matrix of f32 thus: 4*16 byte of size
vs_uniforms_range := gfx.Range{
ptr: &tr_matrix
size: usize(4 * 16)
}
gfx.apply_uniforms(.vs, C.SLOT_vs_params, &vs_uniforms_range)
// fs uniforms
time_ticks := f32(time.ticks() - app.ticks) / 1000
mut text_res := [
f32(512),
512, // x,y resolution to pass to FS
time_ticks, // time as f32
0, // padding 4 Bytes == 1 f32
]!
fs_uniforms_range := gfx.Range{
ptr: unsafe { &text_res }
size: usize(4 * 4)
}
gfx.apply_uniforms(.fs, C.SLOT_fs_params, &fs_uniforms_range)
gfx.draw(0, (3 * 2) * 6, 1)
}
gfx.end_pass()
gfx.commit()
}
fn draw_texture_cubes(app App) {
rot := [f32(app.mouse_x), f32(app.mouse_y)]
sgl.defaults()
sgl.load_pipeline(app.pip_3d)
sgl.enable_texture()
sgl.texture(app.texture, app.sampler)
sgl.matrix_mode_projection()
sgl.perspective(sgl.rad(45.0), 1.0, 0.1, 100.0)
sgl.matrix_mode_modelview()
sgl.translate(0.0, 0.0, -12.0)
sgl.rotate(sgl.rad(rot[0]), 1.0, 0.0, 0.0)
sgl.rotate(sgl.rad(rot[1]), 0.0, 1.0, 0.0)
cube_texture(1, 1, 1)
sgl.push_matrix()
{
sgl.translate(0.0, 0.0, 3.0)
sgl.scale(0.5, 0.5, 0.5)
sgl.rotate(-2.0 * sgl.rad(rot[0]), 1.0, 0.0, 0.0)
sgl.rotate(-2.0 * sgl.rad(rot[1]), 0.0, 1.0, 0.0)
cube_texture(1, 1, 1)
sgl.push_matrix()
{
sgl.translate(0.0, 0.0, 3.0)
sgl.scale(0.5, 0.5, 0.5)
// vfmt off
sgl.rotate(-3.0 * sgl.rad(2 * rot[0]), 1.0, 0.0, 0.0)
sgl.rotate( 3.0 * sgl.rad(2 * rot[1]), 0.0, 0.0, 1.0)
// vfmt on
cube_texture(1, 1, 1)
}
sgl.pop_matrix()
}
sgl.pop_matrix()
sgl.disable_texture()
}
fn frame(mut app App) {
ws := gg.window_size_real_pixels()
ratio := f32(ws.width) / ws.height
dw := ws.width
dh := ws.height
ww := int(dh / 3) // not a bug
hh := int(dh / 3)
x0 := int(f32(dw) * 0.05)
// x1 := dw/2
y0 := 0
y1 := int(f32(dh) * 0.5)
app.gg.begin()
{
sgl.defaults()
// 2d triangle
sgl.viewport(x0, y0, ww, hh, true)
draw_triangle()
// colored cubes with viewport
sgl.viewport(x0, y1, ww, hh, true)
draw_cubes(app)
// textured cubed with viewport
sgl.viewport(0, int(dh / 5), dw, int(dh * ratio), true)
draw_texture_cubes(app)
}
app.gg.end()
// glsl cube
draw_cube_glsl(app)
app.frame_count++
}
/******************************************************************************
* Init / Cleanup
******************************************************************************/
fn my_init(mut app App) {
// set max vertices,
// for a large number of the same type of object it is better use the instances!!
desc := sapp.create_desc()
gfx.setup(&desc)
sgl_desc := sgl.Desc{
max_vertices: 50 * 65536
}
sgl.setup(&sgl_desc)
// 3d pipeline
mut pipdesc := gfx.PipelineDesc{}
unsafe { vmemset(&pipdesc, 0, int(sizeof(pipdesc))) }
color_state := gfx.ColorTargetState{
blend: gfx.BlendState{
enabled: true
src_factor_rgb: .src_alpha
dst_factor_rgb: .one_minus_src_alpha
}
}
pipdesc.colors[0] = color_state
pipdesc.depth = gfx.DepthState{
write_enabled: true
compare: .less_equal
}
pipdesc.cull_mode = .back
app.pip_3d = sgl.make_pipeline(&pipdesc)
// create chessboard texture 256*256 RGBA
w := 256
h := 256
sz := w * h * 4
tmp_txt := unsafe { malloc(sz) }
mut i := 0
for i < sz {
unsafe {
y := (i >> 0x8) >> 5 // 8 cell
x := (i & 0xFF) >> 5 // 8 cell
// upper left corner
if x == 0 && y == 0 {
tmp_txt[i] = u8(0xFF)
tmp_txt[i + 1] = u8(0)
tmp_txt[i + 2] = u8(0)
tmp_txt[i + 3] = u8(0xFF)
}
// low right corner
else if x == 7 && y == 7 {
tmp_txt[i + 0] = u8(0)
tmp_txt[i + 1] = u8(0xFF)
tmp_txt[i + 2] = u8(0)
tmp_txt[i + 3] = u8(0xFF)
} else {
col := if ((x + y) & 1) == 1 { 0xFF } else { 128 }
tmp_txt[i + 0] = u8(col) // red
tmp_txt[i + 1] = u8(col) // green
tmp_txt[i + 2] = u8(col) // blue
tmp_txt[i + 3] = u8(0xFF) // alpha
}
i += 4
}
}
app.texture, app.sampler = create_texture(w, h, tmp_txt)
unsafe { free(tmp_txt) }
// glsl
init_cube_glsl(mut app)
app.init_flag = true
}
/******************************************************************************
* event
******************************************************************************/
fn my_event_manager(mut ev gg.Event, mut app App) {
if ev.typ == .mouse_move {
app.mouse_x = int(ev.mouse_x)
app.mouse_y = int(ev.mouse_y)
}
if ev.typ == .touches_began || ev.typ == .touches_moved {
if ev.num_touches > 0 {
touch_point := ev.touches[0]
app.mouse_x = int(touch_point.pos_x)
app.mouse_y = int(touch_point.pos_y)
}
}
}
fn main() {
// App init
mut app := &App{}
mut a := [5]int{}
a[0] = 2
println(a)
app.gg = gg.new_context(
width: win_width
height: win_height
create_window: true
window_title: '3D Cube Demo'
user_data: app
bg_color: bg_color
frame_fn: frame
init_fn: my_init
event_fn: my_event_manager
)
app.ticks = time.ticks()
app.gg.run()
}
tools/v/examples/sokol/02_cubes_glsl/v.mod
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