640 lines
18 KiB
V
640 lines
18 KiB
V
/**********************************************************************
|
|
*
|
|
* Sokol 3d cube multishader 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:
|
|
* - download the sokol shader convertor tool from https://github.com/floooh/sokol-tools-bin/archive/pre-feb2021-api-changes.tar.gz
|
|
* ( also look at https://github.com/floooh/sokol-tools/blob/master/docs/sokol-shdc.md )
|
|
* - compile the .glsl shared file with:
|
|
* linux : sokol-shdc --input rt_glsl_puppy.glsl --output rt_glsl_puppy.h --slang glsl330
|
|
sokol-shdc --input rt_glsl_march.glsl --output rt_glsl_march.h --slang glsl330
|
|
* windows: sokol-shdc.exe --input rt_glsl_puppy.glsl --output rt_glsl_puppy.h --slang glsl330
|
|
* sokol-shdc.exe --input rt_glsl_march.glsl --output rt_glsl_march.h --slang glsl330
|
|
*
|
|
* --slang parameter can be:
|
|
* - glsl330: desktop GL
|
|
* - glsl100: GLES2 / WebGL
|
|
* - glsl300es: GLES3 / WebGL2
|
|
* - hlsl4: D3D11
|
|
* - hlsl5: D3D11
|
|
* - metal_macos: Metal on macOS
|
|
* - metal_ios: Metal on iOS device
|
|
* - metal_sim: Metal on iOS simulator
|
|
* - wgpu: WebGPU
|
|
*
|
|
* you can have multiple platforms at the same time passing parameters like this: --slang glsl330:hlsl5:metal_macos
|
|
* for further infos have a look at the sokol shader tool docs.
|
|
*
|
|
* TODO:
|
|
* - frame counter
|
|
**********************************************************************/
|
|
import gg
|
|
import gg.m4
|
|
import gx
|
|
// import math
|
|
import sokol.sapp
|
|
import sokol.gfx
|
|
import sokol.sgl
|
|
import time
|
|
|
|
// GLSL Include and functions
|
|
#flag -I @VROOT/.
|
|
#include "rt_glsl_march.h" #Please use sokol-shdc to generate the necessary rt_glsl_march.h file from rt_glsl_march.glsl (see the instructions at the top of this file)
|
|
#include "rt_glsl_puppy.h" #Please use sokol-shdc to generate the necessary rt_glsl_puppy.h file from rt_glsl_puppy.glsl (see the instructions at the top of this file)
|
|
fn C.rt_march_shader_desc(gfx.Backend) &C.sg_shader_desc
|
|
fn C.rt_puppy_shader_desc(gfx.Backend) &C.sg_shader_desc
|
|
|
|
const (
|
|
win_width = 800
|
|
win_height = 800
|
|
bg_color = gx.white
|
|
)
|
|
|
|
struct App {
|
|
mut:
|
|
gg &gg.Context
|
|
texture C.sg_image
|
|
init_flag bool
|
|
frame_count int
|
|
mouse_x int = -1
|
|
mouse_y int = -1
|
|
mouse_down bool
|
|
// glsl
|
|
cube_pip_glsl C.sg_pipeline
|
|
cube_bind C.sg_bindings
|
|
pipe map[string]C.sg_pipeline
|
|
bind map[string]C.sg_bindings
|
|
// time
|
|
ticks i64
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Texture functions
|
|
******************************************************************************/
|
|
fn create_texture(w int, h int, buf byteptr) C.sg_image {
|
|
sz := w * h * 4
|
|
mut img_desc := C.sg_image_desc{
|
|
width: w
|
|
height: h
|
|
num_mipmaps: 0
|
|
min_filter: .linear
|
|
mag_filter: .linear
|
|
// usage: .dynamic
|
|
wrap_u: .clamp_to_edge
|
|
wrap_v: .clamp_to_edge
|
|
label: &byte(0)
|
|
d3d11_texture: 0
|
|
}
|
|
// comment if .dynamic is enabled
|
|
img_desc.data.subimage[0][0] = C.sg_range{
|
|
ptr: buf
|
|
size: size_t(sz)
|
|
}
|
|
|
|
sg_img := C.sg_make_image(&img_desc)
|
|
return sg_img
|
|
}
|
|
|
|
fn destroy_texture(sg_img C.sg_image) {
|
|
C.sg_destroy_image(sg_img)
|
|
}
|
|
|
|
// Use only if usage: .dynamic is enabled
|
|
fn update_text_texture(sg_img C.sg_image, w int, h int, buf byteptr) {
|
|
sz := w * h * 4
|
|
mut tmp_sbc := C.sg_image_data{}
|
|
tmp_sbc.subimage[0][0] = C.sg_range{
|
|
ptr: buf
|
|
size: size_t(sz)
|
|
}
|
|
C.sg_update_image(sg_img, &tmp_sbc)
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Draw functions
|
|
******************************************************************************
|
|
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 // for compatibility with D3D11
|
|
// v u16 // for compatibility with D3D11
|
|
u f32
|
|
v f32
|
|
}
|
|
|
|
// march shader init
|
|
fn init_cube_glsl_m(mut app App) {
|
|
// cube vertex buffer
|
|
// d := u16(32767) // for compatibility with D3D11, 32767 stand for 1
|
|
d := f32(1.0)
|
|
c := u32(0xFFFFFF_FF) // color RGBA8
|
|
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},
|
|
]
|
|
|
|
mut vert_buffer_desc := C.sg_buffer_desc{}
|
|
unsafe { C.memset(&vert_buffer_desc, 0, sizeof(vert_buffer_desc)) }
|
|
vert_buffer_desc.size = size_t(vertices.len * int(sizeof(Vertex_t)))
|
|
vert_buffer_desc.data = C.sg_range{
|
|
ptr: vertices.data
|
|
size: size_t(vertices.len * int(sizeof(Vertex_t)))
|
|
}
|
|
vert_buffer_desc.@type = .vertexbuffer
|
|
vert_buffer_desc.label = 'cube-vertices'.str
|
|
vbuf := gfx.make_buffer(&vert_buffer_desc)
|
|
|
|
/* create an index buffer for the cube */
|
|
indices := [
|
|
u16(0), 1, 2, 0, 2, 3,
|
|
6, 5, 4, 7, 6, 4,
|
|
8, 9, 10, 8, 10, 11,
|
|
/*
|
|
u16(14), 13, 12, 15, 14, 12,
|
|
16, 17, 18, 16, 18, 19,
|
|
22, 21, 20, 23, 22, 20
|
|
*/
|
|
]
|
|
|
|
mut index_buffer_desc := C.sg_buffer_desc{}
|
|
unsafe { C.memset(&index_buffer_desc, 0, sizeof(index_buffer_desc)) }
|
|
index_buffer_desc.size = size_t(indices.len * int(sizeof(u16)))
|
|
index_buffer_desc.data = C.sg_range{
|
|
ptr: indices.data
|
|
size: size_t(indices.len * int(sizeof(u16)))
|
|
}
|
|
index_buffer_desc.@type = .indexbuffer
|
|
index_buffer_desc.label = 'cube-indices'.str
|
|
ibuf := gfx.make_buffer(&index_buffer_desc)
|
|
|
|
// create shader
|
|
shader := gfx.make_shader(C.rt_march_shader_desc(C.sg_query_backend()))
|
|
|
|
mut pipdesc := C.sg_pipeline_desc{}
|
|
unsafe { C.memset(&pipdesc, 0, sizeof(pipdesc)) }
|
|
pipdesc.layout.buffers[0].stride = int(sizeof(Vertex_t))
|
|
|
|
// the constants [C.ATTR_vs_m_pos, C.ATTR_vs_m_color0, C.ATTR_vs_m_texcoord0] are generated by sokol-shdc
|
|
pipdesc.layout.attrs[C.ATTR_vs_m_pos ].format = .float3 // x,y,z as f32
|
|
pipdesc.layout.attrs[C.ATTR_vs_m_color0 ].format = .ubyte4n // color as u32
|
|
pipdesc.layout.attrs[C.ATTR_vs_m_texcoord0].format = .float2 // u,v as f32
|
|
// pipdesc.layout.attrs[C.ATTR_vs_m_texcoord0].format = .short2n // u,v as u16
|
|
|
|
pipdesc.shader = shader
|
|
pipdesc.index_type = .uint16
|
|
|
|
pipdesc.depth = C.sg_depth_state{
|
|
write_enabled: true
|
|
compare: gfx.CompareFunc(C.SG_COMPAREFUNC_LESS_EQUAL)
|
|
}
|
|
pipdesc.cull_mode = .back
|
|
pipdesc.label = 'glsl_shader pipeline'.str
|
|
|
|
mut bind := C.sg_bindings{}
|
|
unsafe { C.memset(&bind, 0, sizeof(bind)) }
|
|
bind.vertex_buffers[0] = vbuf
|
|
bind.index_buffer = ibuf
|
|
bind.fs_images[C.SLOT_tex] = app.texture
|
|
app.bind['march'] = bind
|
|
|
|
app.pipe['march'] = gfx.make_pipeline(&pipdesc)
|
|
|
|
println('GLSL March init DONE!')
|
|
}
|
|
|
|
// putty shader init
|
|
fn init_cube_glsl_p(mut app App) {
|
|
// cube vertex buffer
|
|
// d := u16(32767) // for compatibility with D3D11, 32767 stand for 1
|
|
d := f32(1.0)
|
|
c := u32(0xFFFFFF_FF) // color RGBA8
|
|
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},
|
|
]
|
|
|
|
mut vert_buffer_desc := C.sg_buffer_desc{}
|
|
unsafe { C.memset(&vert_buffer_desc, 0, sizeof(vert_buffer_desc)) }
|
|
vert_buffer_desc.size = size_t(vertices.len * int(sizeof(Vertex_t)))
|
|
vert_buffer_desc.data = C.sg_range{
|
|
ptr: vertices.data
|
|
size: size_t(vertices.len * int(sizeof(Vertex_t)))
|
|
}
|
|
vert_buffer_desc.@type = .vertexbuffer
|
|
vert_buffer_desc.label = 'cube-vertices'.str
|
|
vbuf := gfx.make_buffer(&vert_buffer_desc)
|
|
|
|
/* create an index buffer for the cube */
|
|
indices := [
|
|
/*
|
|
u16(0), 1, 2, 0, 2, 3,
|
|
6, 5, 4, 7, 6, 4,
|
|
8, 9, 10, 8, 10, 11,
|
|
*/
|
|
u16(14), 13, 12, 15, 14, 12,
|
|
16, 17, 18, 16, 18, 19,
|
|
22, 21, 20, 23, 22, 20
|
|
|
|
]
|
|
|
|
mut index_buffer_desc := C.sg_buffer_desc{}
|
|
unsafe { C.memset(&index_buffer_desc, 0, sizeof(index_buffer_desc)) }
|
|
index_buffer_desc.size = size_t(indices.len * int(sizeof(u16)))
|
|
index_buffer_desc.data = C.sg_range{
|
|
ptr: indices.data
|
|
size: size_t(indices.len * int(sizeof(u16)))
|
|
}
|
|
index_buffer_desc.@type = .indexbuffer
|
|
index_buffer_desc.label = 'cube-indices'.str
|
|
ibuf := gfx.make_buffer(&index_buffer_desc)
|
|
|
|
// create shader
|
|
shader := gfx.make_shader(C.rt_puppy_shader_desc(C.sg_query_backend()))
|
|
|
|
mut pipdesc := C.sg_pipeline_desc{}
|
|
unsafe { C.memset(&pipdesc, 0, sizeof(pipdesc)) }
|
|
pipdesc.layout.buffers[0].stride = int(sizeof(Vertex_t))
|
|
|
|
// the constants [C.ATTR_vs_p_pos, C.ATTR_vs_p_color0, C.ATTR_vs_p_texcoord0] are generated by sokol-shdc
|
|
pipdesc.layout.attrs[C.ATTR_vs_p_pos ].format = .float3 // x,y,z as f32
|
|
pipdesc.layout.attrs[C.ATTR_vs_p_color0 ].format = .ubyte4n // color as u32
|
|
pipdesc.layout.attrs[C.ATTR_vs_p_texcoord0].format = .float2 // u,v as f32
|
|
// pipdesc.layout.attrs[C.ATTR_vs_p_texcoord0].format = .short2n // u,v as u16
|
|
|
|
pipdesc.shader = shader
|
|
pipdesc.index_type = .uint16
|
|
|
|
pipdesc.depth = C.sg_depth_state{
|
|
write_enabled: true
|
|
compare: gfx.CompareFunc(C.SG_COMPAREFUNC_LESS_EQUAL)
|
|
}
|
|
pipdesc.cull_mode = .back
|
|
|
|
pipdesc.label = 'glsl_shader pipeline'.str
|
|
|
|
mut bind := C.sg_bindings{}
|
|
unsafe { C.memset(&bind, 0, sizeof(bind)) }
|
|
bind.vertex_buffers[0] = vbuf
|
|
bind.index_buffer = ibuf
|
|
bind.fs_images[C.SLOT_tex] = app.texture
|
|
app.bind['puppy'] = bind
|
|
|
|
app.pipe['puppy'] = gfx.make_pipeline(&pipdesc)
|
|
|
|
println('GLSL Puppy init DONE!')
|
|
}
|
|
|
|
[inline]
|
|
fn vec4(x f32, y f32, z f32, w f32) m4.Vec4 {
|
|
return m4.Vec4{e:[x, y, z, w]!}
|
|
}
|
|
|
|
fn calc_tr_matrices(w f32, h f32, rx f32, ry f32, in_scale f32) m4.Mat4 {
|
|
proj := m4.perspective(60, w/h, 0.01, 10.0)
|
|
view := m4.look_at(vec4(f32(0.0) ,0 , 6, 0), vec4(f32(0), 0, 0, 0), vec4(f32(0), 1, 0, 0))
|
|
view_proj := view * proj
|
|
|
|
rxm := m4.rotate(m4.rad(rx), vec4(f32(1), 0, 0, 0))
|
|
rym := m4.rotate(m4.rad(ry), vec4(f32(0), 1, 0, 0))
|
|
|
|
model := rym * rxm
|
|
scale_m := m4.scale(vec4(in_scale, in_scale, in_scale, 1))
|
|
|
|
res := (scale_m * model) * view_proj
|
|
return res
|
|
}
|
|
|
|
// march triangles draw
|
|
fn draw_cube_glsl_m(app App) {
|
|
if app.init_flag == false {
|
|
return
|
|
}
|
|
|
|
ws := gg.window_size_real_pixels()
|
|
ratio := f32(ws.width) / ws.height
|
|
dw := f32(ws.width / 2)
|
|
dh := f32(ws.height / 2)
|
|
|
|
rot := [f32(app.mouse_y), f32(app.mouse_x)]
|
|
tr_matrix := calc_tr_matrices(dw, dh, rot[0], rot[1], 2.3)
|
|
|
|
gfx.apply_pipeline(app.pipe['march'])
|
|
gfx.apply_bindings(app.bind['march'])
|
|
|
|
// Uniforms
|
|
// *** vertex shadeer uniforms ***
|
|
// passing the view matrix as uniform
|
|
// res is a 4x4 matrix of f32 thus: 4*16 byte of size
|
|
vs_uniforms_range := C.sg_range{
|
|
ptr: &tr_matrix
|
|
size: size_t(4 * 16)
|
|
}
|
|
gfx.apply_uniforms(C.SG_SHADERSTAGE_VS, C.SLOT_vs_params_m, &vs_uniforms_range)
|
|
|
|
// *** fragment shader uniforms ***
|
|
time_ticks := f32(time.ticks() - app.ticks) / 1000
|
|
mut tmp_fs_params := [
|
|
f32(ws.width),
|
|
ws.height * ratio, // x,y resolution to pass to FS
|
|
0,
|
|
0, // dont send mouse position
|
|
/* app.mouse_x, // mouse x */
|
|
/* ws.height - app.mouse_y*2, // mouse y scaled */
|
|
time_ticks, // time as f32
|
|
app.frame_count, // frame count
|
|
0,
|
|
0 // padding bytes , see "fs_params" struct paddings in rt_glsl.h
|
|
]!
|
|
fs_uniforms_range := C.sg_range{
|
|
ptr: &tmp_fs_params
|
|
size: size_t(sizeof(tmp_fs_params))
|
|
}
|
|
gfx.apply_uniforms(C.SG_SHADERSTAGE_FS, C.SLOT_fs_params_p, &fs_uniforms_range)
|
|
|
|
// 3 vertices for triangle * 2 triangles per face * 6 faces = 36 vertices to draw
|
|
gfx.draw(0, (3 * 2) * 3, 1)
|
|
}
|
|
|
|
// puppy triangles draw
|
|
fn draw_cube_glsl_p(app App) {
|
|
if app.init_flag == false {
|
|
return
|
|
}
|
|
|
|
ws := gg.window_size_real_pixels()
|
|
ratio := f32(ws.width) / ws.height
|
|
dw := f32(ws.width / 2)
|
|
dh := f32(ws.height / 2)
|
|
|
|
rot := [f32(app.mouse_y), f32(app.mouse_x)]
|
|
tr_matrix := calc_tr_matrices(dw, dh, rot[0], rot[1], 2.3)
|
|
|
|
// apply the pipline and bindings
|
|
gfx.apply_pipeline(app.pipe['puppy'])
|
|
gfx.apply_bindings(app.bind['puppy'])
|
|
|
|
// Uniforms
|
|
// *** vertex shadeer uniforms ***
|
|
// passing the view matrix as uniform
|
|
// res is a 4x4 matrix of f32 thus: 4*16 byte of size
|
|
vs_uniforms_range := C.sg_range{
|
|
ptr: &tr_matrix
|
|
size: size_t(4 * 16)
|
|
}
|
|
gfx.apply_uniforms(C.SG_SHADERSTAGE_VS, C.SLOT_vs_params_p, &vs_uniforms_range)
|
|
|
|
// *** fragment shader uniforms ***
|
|
time_ticks := f32(time.ticks() - app.ticks) / 1000
|
|
mut tmp_fs_params := [
|
|
f32(ws.width),
|
|
ws.height * ratio, // x,y resolution to pass to FS
|
|
0,
|
|
0, // dont send mouse position
|
|
/* app.mouse_x, // mouse x */
|
|
/* ws.height - app.mouse_y*2, // mouse y scaled */
|
|
time_ticks, // time as f32
|
|
app.frame_count, // frame count
|
|
0,
|
|
0 // padding bytes , see "fs_params" struct paddings in rt_glsl.h
|
|
]!
|
|
fs_uniforms_range := C.sg_range{
|
|
ptr: &tmp_fs_params
|
|
size: size_t(sizeof(tmp_fs_params))
|
|
}
|
|
gfx.apply_uniforms(C.SG_SHADERSTAGE_FS, C.SLOT_fs_params_p, &fs_uniforms_range)
|
|
|
|
// 3 vertices for triangle * 2 triangles per face * 6 faces = 36 vertices to draw
|
|
gfx.draw(0, (3 * 2) * 3, 1)
|
|
}
|
|
|
|
fn draw_start_glsl(app App) {
|
|
if app.init_flag == false {
|
|
return
|
|
}
|
|
|
|
ws := gg.window_size_real_pixels()
|
|
// ratio := f32(ws.width) / ws.height
|
|
// dw := f32(ws.width / 2)
|
|
// dh := f32(ws.height / 2)
|
|
|
|
gfx.apply_viewport(0, 0, ws.width, ws.height, true)
|
|
}
|
|
|
|
fn draw_end_glsl(app App) {
|
|
gfx.end_pass()
|
|
gfx.commit()
|
|
}
|
|
|
|
fn frame(mut app App) {
|
|
ws := gg.window_size_real_pixels()
|
|
|
|
// clear
|
|
mut color_action := C.sg_color_attachment_action{
|
|
action: gfx.Action(C.SG_ACTION_CLEAR)
|
|
value: C.sg_color{
|
|
r: 0.0
|
|
g: 0.0
|
|
b: 0.0
|
|
a: 1.0
|
|
}
|
|
}
|
|
mut pass_action := C.sg_pass_action{}
|
|
pass_action.colors[0] = color_action
|
|
gfx.begin_default_pass(&pass_action, ws.width, ws.height)
|
|
|
|
/*
|
|
// glsl cube
|
|
if app.frame_count % 1 == 1{
|
|
draw_cube_glsl_m(app)
|
|
} else {
|
|
draw_cube_glsl_p(app)
|
|
}
|
|
*/
|
|
draw_start_glsl(app)
|
|
draw_cube_glsl_m(app)
|
|
draw_cube_glsl_p(app)
|
|
draw_end_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 := C.sgl_desc_t{
|
|
max_vertices: 50 * 65536
|
|
}
|
|
sgl.setup(&sgl_desc)
|
|
|
|
// 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 + 0] = byte(0xFF)
|
|
tmp_txt[i + 1] = byte(0)
|
|
tmp_txt[i + 2] = byte(0)
|
|
tmp_txt[i + 3] = byte(0xFF)
|
|
}
|
|
// low right corner
|
|
else if x == 7 && y == 7 {
|
|
tmp_txt[i + 0] = byte(0)
|
|
tmp_txt[i + 1] = byte(0xFF)
|
|
tmp_txt[i + 2] = byte(0)
|
|
tmp_txt[i + 3] = byte(0xFF)
|
|
} else {
|
|
col := if ((x + y) & 1) == 1 { 0xFF } else { 128 }
|
|
tmp_txt[i + 0] = byte(col) // red
|
|
tmp_txt[i + 1] = byte(col) // green
|
|
tmp_txt[i + 2] = byte(col) // blue
|
|
tmp_txt[i + 3] = byte(0xFF) // alpha
|
|
}
|
|
i += 4
|
|
}
|
|
}
|
|
app.texture = create_texture(w, h, tmp_txt)
|
|
unsafe { free(tmp_txt) }
|
|
|
|
// glsl
|
|
init_cube_glsl_m(mut app)
|
|
init_cube_glsl_p(mut app)
|
|
app.init_flag = true
|
|
}
|
|
|
|
fn cleanup(mut app App) {
|
|
gfx.shutdown()
|
|
}
|
|
|
|
/******************************************************************************
|
|
* events handling
|
|
******************************************************************************/
|
|
fn my_event_manager(mut ev gg.Event, mut app App) {
|
|
if ev.typ == .mouse_down {
|
|
app.mouse_down = true
|
|
}
|
|
if ev.typ == .mouse_up {
|
|
app.mouse_down = false
|
|
}
|
|
if app.mouse_down == true && 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)
|
|
}
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Main
|
|
******************************************************************************/
|
|
[console] // is needed for easier diagnostics on windows
|
|
fn main() {
|
|
// App init
|
|
mut app := &App{
|
|
gg: 0
|
|
}
|
|
|
|
app.gg = gg.new_context(
|
|
width: win_width
|
|
height: win_height
|
|
use_ortho: true // This is needed for 2D drawing
|
|
create_window: true
|
|
window_title: '3D Dual shader Cube - click and rotate with the mouse'
|
|
user_data: app
|
|
bg_color: bg_color
|
|
frame_fn: frame
|
|
init_fn: my_init
|
|
cleanup_fn: cleanup
|
|
event_fn: my_event_manager
|
|
)
|
|
|
|
app.ticks = time.ticks()
|
|
app.gg.run()
|
|
}
|