611 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			V
		
	
	
			
		
		
	
	
			611 lines
		
	
	
		
			16 KiB
		
	
	
	
		
			V
		
	
	
| /**********************************************************************
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| *
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| * Sokol 3d cube demo
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| *
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| * Copyright (c) 2021 Dario Deledda. All rights reserved.
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| * Use of this source code is governed by an MIT license
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| * that can be found in the LICENSE file.
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| *
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| * HOW TO COMPILE SHADERS:
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| * Run `v shader .` in this directory to compile the shaders.
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| * For more info and help with shader compilation see `docs.md` and `v help shader`.
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| *
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| * TODO:
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| * - add instancing
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| **********************************************************************/
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| import gg
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| import gx
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| // import math
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| import sokol.sapp
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| import sokol.gfx
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| import sokol.sgl
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| import time
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| import gg.m4
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| 
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| // GLSL Include and functions
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| #flag -I @VMODROOT/.
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| #include "cube_glsl.h" # Should be generated with `v shader .` (see the instructions at the top of this file)
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| 
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| fn C.cube_shader_desc(gfx.Backend) &C.sg_shader_desc
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| 
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| const (
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| 	win_width  = 800
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| 	win_height = 800
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| 	bg_color   = gx.white
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| )
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| 
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| struct App {
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| mut:
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| 	gg          &gg.Context
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| 	pip_3d      C.sgl_pipeline
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| 	texture     C.sg_image
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| 	init_flag   bool
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| 	frame_count int
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| 	mouse_x     int = -1
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| 	mouse_y     int = -1
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| 	// glsl
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| 	cube_pip_glsl C.sg_pipeline
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| 	cube_bind     C.sg_bindings
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| 	// time
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| 	ticks i64
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| }
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| 
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| /******************************************************************************
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| *
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| * Texture functions
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| *
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| ******************************************************************************/
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| fn create_texture(w int, h int, buf &byte) C.sg_image {
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| 	sz := w * h * 4
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| 	mut img_desc := C.sg_image_desc{
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| 		width: w
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| 		height: h
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| 		num_mipmaps: 0
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| 		min_filter: .linear
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| 		mag_filter: .linear
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| 		// usage: .dynamic
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| 		wrap_u: .clamp_to_edge
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| 		wrap_v: .clamp_to_edge
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| 		label: &byte(0)
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| 		d3d11_texture: 0
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| 	}
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| 	// comment if .dynamic is enabled
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| 	img_desc.data.subimage[0][0] = C.sg_range{
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| 		ptr: buf
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| 		size: usize(sz)
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| 	}
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| 
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| 	sg_img := C.sg_make_image(&img_desc)
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| 	return sg_img
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| }
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| 
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| fn destroy_texture(sg_img C.sg_image) {
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| 	C.sg_destroy_image(sg_img)
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| }
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| 
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| // Use only if usage: .dynamic is enabled
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| fn update_text_texture(sg_img C.sg_image, w int, h int, buf &byte) {
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| 	sz := w * h * 4
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| 	mut tmp_sbc := C.sg_image_data{}
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| 	tmp_sbc.subimage[0][0] = C.sg_range{
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| 		ptr: buf
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| 		size: usize(sz)
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| 	}
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| 	C.sg_update_image(sg_img, &tmp_sbc)
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| }
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| 
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| /******************************************************************************
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| *
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| * Draw functions
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| *
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| ******************************************************************************/
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| fn draw_triangle() {
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| 	sgl.defaults()
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| 	sgl.begin_triangles()
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| 	sgl.v2f_c3b( 0.0,  0.5, 255, 0  , 0  )
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| 	sgl.v2f_c3b(-0.5, -0.5,   0, 0  , 255)
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| 	sgl.v2f_c3b( 0.5, -0.5,   0, 255, 0  )
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| 	sgl.end()
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| }
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| 
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| // vertex specification for a cube with colored sides and texture coords
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| fn cube() {
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| 	sgl.begin_quads()
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| 	// edge color
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| 	sgl.c3f(1.0, 0.0, 0.0)
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| 	// edge coord
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| 	// x,y,z, texture cord: u,v
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| 	sgl.v3f_t2f(-1.0,  1.0, -1.0, -1.0,  1.0)
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| 	sgl.v3f_t2f( 1.0,  1.0, -1.0,  1.0,  1.0)
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| 	sgl.v3f_t2f( 1.0, -1.0, -1.0,  1.0, -1.0)
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| 	sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0)
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| 	sgl.c3f(0.0, 1.0, 0.0)
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| 	sgl.v3f_t2f(-1.0, -1.0,  1.0, -1.0,  1.0)
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| 	sgl.v3f_t2f( 1.0, -1.0,  1.0,  1.0,  1.0)
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| 	sgl.v3f_t2f( 1.0,  1.0,  1.0,  1.0, -1.0)
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| 	sgl.v3f_t2f(-1.0,  1.0,  1.0, -1.0, -1.0)
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| 	sgl.c3f(0.0, 0.0, 1.0)
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| 	sgl.v3f_t2f(-1.0, -1.0,  1.0, -1.0,  1.0)
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| 	sgl.v3f_t2f(-1.0,  1.0,  1.0,  1.0,  1.0)
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| 	sgl.v3f_t2f(-1.0,  1.0, -1.0,  1.0, -1.0)
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| 	sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0)
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| 	sgl.c3f(1.0, 0.5, 0.0)
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| 	sgl.v3f_t2f(1.0, -1.0,  1.0, -1.0,   1.0)
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| 	sgl.v3f_t2f(1.0, -1.0, -1.0,  1.0,   1.0)
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| 	sgl.v3f_t2f(1.0,  1.0, -1.0,  1.0,  -1.0)
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| 	sgl.v3f_t2f(1.0,  1.0,  1.0, -1.0,  -1.0)
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| 	sgl.c3f(0.0, 0.5, 1.0)
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| 	sgl.v3f_t2f( 1.0, -1.0, -1.0, -1.0,  1.0)
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| 	sgl.v3f_t2f( 1.0, -1.0,  1.0,  1.0,  1.0)
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| 	sgl.v3f_t2f(-1.0, -1.0,  1.0,  1.0, -1.0)
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| 	sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0)
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| 	sgl.c3f(1.0, 0.0, 0.5)
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| 	sgl.v3f_t2f(-1.0,  1.0, -1.0, -1.0,  1.0)
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| 	sgl.v3f_t2f(-1.0,  1.0,  1.0,  1.0,  1.0)
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| 	sgl.v3f_t2f( 1.0,  1.0,  1.0,  1.0, -1.0)
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| 	sgl.v3f_t2f( 1.0,  1.0, -1.0, -1.0, -1.0)
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| 	sgl.end()
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| }
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| 
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| fn draw_cubes(app App) {
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| 	rot := [f32(1.0) * (app.frame_count % 360), 0.5 * f32(app.frame_count % 360)]
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| 	// rot := [f32(app.mouse_x), f32(app.mouse_y)]
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| 
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| 	sgl.defaults()
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| 	sgl.load_pipeline(app.pip_3d)
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| 
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| 	sgl.matrix_mode_projection()
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| 	sgl.perspective(sgl.rad(45.0), 1.0, 0.1, 100.0)
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| 
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| 	sgl.matrix_mode_modelview()
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| 	sgl.translate(0.0, 0.0, -12.0)
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| 	sgl.rotate(sgl.rad(rot[0]), 1.0, 0.0, 0.0)
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| 	sgl.rotate(sgl.rad(rot[1]), 0.0, 1.0, 0.0)
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| 	cube()
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| 	sgl.push_matrix()
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| 	sgl.translate(0.0, 0.0, 3.0)
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| 	sgl.scale(0.5, 0.5, 0.5)
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| 	sgl.rotate(-2.0 * sgl.rad(rot[0]), 1.0, 0.0, 0.0)
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| 	sgl.rotate(-2.0 * sgl.rad(rot[1]), 0.0, 1.0, 0.0)
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| 	cube()
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| 	sgl.push_matrix()
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| 	sgl.translate(0.0, 0.0, 3.0)
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| 	sgl.scale(0.5, 0.5, 0.5)
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| 	sgl.rotate(-3.0 * sgl.rad(2 * rot[0]), 1.0, 0.0, 0.0)
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| 	sgl.rotate( 3.0 * sgl.rad(2 * rot[1]), 0.0, 0.0, 1.0)
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| 	cube()
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| 	sgl.pop_matrix()
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| 	sgl.pop_matrix()
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| }
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| 
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| fn cube_texture(r f32, g f32, b f32) {
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| 	sgl.begin_quads()
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| 	// edge color
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| 	sgl.c3f(r, g, b)
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| 	// edge coord
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| 	// x,y,z, texture cord: u,v
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| 	sgl.v3f_t2f(-1.0,  1.0, -1.0,  0.0 , 0.25)
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| 	sgl.v3f_t2f( 1.0,  1.0, -1.0,  0.25, 0.25)
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| 	sgl.v3f_t2f( 1.0, -1.0, -1.0,  0.25, 0.0 )
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| 	sgl.v3f_t2f(-1.0, -1.0, -1.0,  0.0 , 0.0 )
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| 	sgl.c3f(r, g, b)
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| 	sgl.v3f_t2f(-1.0, -1.0,  1.0,  0.0 , 0.25)
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| 	sgl.v3f_t2f( 1.0, -1.0,  1.0,  0.25, 0.25)
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| 	sgl.v3f_t2f( 1.0,  1.0,  1.0,  0.25, 0.0 )
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| 	sgl.v3f_t2f(-1.0,  1.0,  1.0,  0.0 , 0.0 )
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| 	sgl.c3f(r, g, b)
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| 	sgl.v3f_t2f(-1.0, -1.0,  1.0,  0.0 , 0.25)
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| 	sgl.v3f_t2f(-1.0,  1.0,  1.0,  0.25, 0.25)
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| 	sgl.v3f_t2f(-1.0,  1.0, -1.0,  0.25, 0.0 )
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| 	sgl.v3f_t2f(-1.0, -1.0, -1.0,  0.0 , 0.0 )
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| 	sgl.c3f(r, g, b)
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| 	sgl.v3f_t2f(1.0, -1.0,  1.0,  0.0 , 0.25)
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| 	sgl.v3f_t2f(1.0, -1.0, -1.0,  0.25, 0.25)
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| 	sgl.v3f_t2f(1.0,  1.0, -1.0,  0.25, 0.0 )
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| 	sgl.v3f_t2f(1.0,  1.0,  1.0,  0.0 , 0.0 )
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| 	sgl.c3f(r, g, b)
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| 	sgl.v3f_t2f( 1.0, -1.0, -1.0, 0.0 , 0.25)
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| 	sgl.v3f_t2f( 1.0, -1.0,  1.0, 0.25, 0.25)
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| 	sgl.v3f_t2f(-1.0, -1.0,  1.0, 0.25, 0.0 )
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| 	sgl.v3f_t2f(-1.0, -1.0, -1.0, 0.0 , 0.0 )
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| 	sgl.c3f(r, g, b)
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| 	sgl.v3f_t2f(-1.0,  1.0, -1.0,  0.0 , 0.25)
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| 	sgl.v3f_t2f(-1.0,  1.0,  1.0,  0.25, 0.25)
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| 	sgl.v3f_t2f( 1.0,  1.0,  1.0,  0.25, 0.0 )
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| 	sgl.v3f_t2f( 1.0,  1.0, -1.0,  0.0 , 0.0 )
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| 	sgl.end()
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| }
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| 
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| /*
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| Cube vertex buffer with packed vertex formats for color and texture coords.
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| 		Note that a vertex format which must be portable across all
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| 		backends must only use the normalized integer formats
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| 		(BYTE4N, UBYTE4N, SHORT2N, SHORT4N), which can be converted
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| 		to floating point formats in the vertex shader inputs.
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| 		The reason is that D3D11 cannot convert from non-normalized
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| 		formats to floating point inputs (only to integer inputs),
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| 		and WebGL2 / GLES2 don't support integer vertex shader inputs.
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| */
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| 
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| struct Vertex_t {
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| 	x     f32
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| 	y     f32
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| 	z     f32
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| 	color u32
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| 	// u u16
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| 	// v u16
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| 	u     f32
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| 	v     f32
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| }
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| 
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| fn init_cube_glsl(mut app App) {
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| 	// cube vertex buffer
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| 	// d := u16(32767/8)       // for compatibility with D3D11, 32767 stand for 1
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| 	d := f32(1.0) // 0.05)
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| 	c := u32(0xFFFFFF_FF) // color RGBA8
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| 	vertices := [
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| 		// Face 0
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| 		Vertex_t{-1.0, -1.0, -1.0, c,  0, 0},
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| 		Vertex_t{ 1.0, -1.0, -1.0, c,  d, 0},
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| 		Vertex_t{ 1.0,  1.0, -1.0, c,  d, d},
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| 		Vertex_t{-1.0,  1.0, -1.0, c,  0, d},
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| 		// Face 1
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| 		Vertex_t{-1.0, -1.0,  1.0, c,  0, 0},
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| 		Vertex_t{ 1.0, -1.0,  1.0, c,  d, 0},
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| 		Vertex_t{ 1.0,  1.0,  1.0, c,  d, d},
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| 		Vertex_t{-1.0,  1.0,  1.0, c,  0, d},
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| 		// Face 2
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| 		Vertex_t{-1.0, -1.0, -1.0, c,  0, 0},
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| 		Vertex_t{-1.0,  1.0, -1.0, c,  d, 0},
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| 		Vertex_t{-1.0,  1.0,  1.0, c,  d, d},
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| 		Vertex_t{-1.0, -1.0,  1.0, c,  0, d},
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| 		// Face 3
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| 		Vertex_t{ 1.0, -1.0, -1.0, c,  0, 0},
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| 		Vertex_t{ 1.0,  1.0, -1.0, c,  d, 0},
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| 		Vertex_t{ 1.0,  1.0,  1.0, c,  d, d},
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| 		Vertex_t{ 1.0, -1.0,  1.0, c,  0, d},
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| 		// Face 4
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| 		Vertex_t{-1.0, -1.0, -1.0, c,  0, 0},
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| 		Vertex_t{-1.0, -1.0,  1.0, c,  d, 0},
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| 		Vertex_t{ 1.0, -1.0,  1.0, c,  d, d},
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| 		Vertex_t{ 1.0, -1.0, -1.0, c,  0, d},
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| 		// Face 5
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| 		Vertex_t{-1.0,  1.0, -1.0, c,  0, 0},
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| 		Vertex_t{-1.0,  1.0,  1.0, c,  d, 0},
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| 		Vertex_t{ 1.0,  1.0,  1.0, c,  d, d},
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| 		Vertex_t{ 1.0,  1.0, -1.0, c,  0, d},
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| 	]
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| 
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| 	mut vert_buffer_desc := C.sg_buffer_desc{label: c'cube-vertices'}
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| 	unsafe { C.memset(&vert_buffer_desc, 0, sizeof(vert_buffer_desc)) }
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| 
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| 	vert_buffer_desc.size = usize(vertices.len * int(sizeof(Vertex_t)))
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| 	vert_buffer_desc.data = C.sg_range{
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| 		ptr: vertices.data
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| 		size: usize(vertices.len * int(sizeof(Vertex_t)))
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| 	}
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| 
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| 	vert_buffer_desc.@type = .vertexbuffer
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| 	// vert_buffer_desc.usage   = .immutable
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| 	vbuf := gfx.make_buffer(&vert_buffer_desc)
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| 
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| 	/* create an index buffer for the cube */
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| 	indices := [
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| 		u16(0), 1, 2,  0, 2, 3,
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| 		6, 5, 4,       7, 6, 4,
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| 		8, 9, 10,      8, 10, 11,
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| 		14, 13, 12,    15, 14, 12,
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| 		16, 17, 18,    16, 18, 19,
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| 		22, 21, 20,    23, 22, 20
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| 	]
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| 
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| 	mut index_buffer_desc := C.sg_buffer_desc{label: c'cube-indices'}
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| 	unsafe { C.memset(&index_buffer_desc, 0, sizeof(index_buffer_desc)) }
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| 
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| 	index_buffer_desc.size = usize(indices.len * int(sizeof(u16)))
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| 	index_buffer_desc.data = C.sg_range{
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| 		ptr: indices.data
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| 		size: usize(indices.len * int(sizeof(u16)))
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| 	}
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| 
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| 	index_buffer_desc.@type = .indexbuffer
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| 	ibuf := gfx.make_buffer(&index_buffer_desc)
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| 
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| 	// create shader
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| 	shader := gfx.make_shader(C.cube_shader_desc(C.sg_query_backend()))
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| 
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| 	mut pipdesc := C.sg_pipeline_desc{}
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| 	unsafe { C.memset(&pipdesc, 0, sizeof(pipdesc)) }
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| 
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| 	pipdesc.layout.buffers[0].stride = int(sizeof(Vertex_t))
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| 	// the constants [C.ATTR_vs_pos, C.ATTR_vs_color0, C.ATTR_vs_texcoord0] are generated bysokol-shdc
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| 	pipdesc.layout.attrs[C.ATTR_vs_pos      ].format = .float3  // x,y,z as f32
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| 	pipdesc.layout.attrs[C.ATTR_vs_color0   ].format = .ubyte4n // color as u32
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| 	pipdesc.layout.attrs[C.ATTR_vs_texcoord0].format = .float2  // u,v as f32
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| 	// pipdesc.layout.attrs[C.ATTR_vs_texcoord0].format  = .short2n  // u,v as u16
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| 
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| 	pipdesc.shader = shader
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| 	pipdesc.index_type = .uint16
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| 
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| 	pipdesc.depth = C.sg_depth_state{
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| 		write_enabled: true
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| 		compare: gfx.CompareFunc(C.SG_COMPAREFUNC_LESS_EQUAL)
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| 	}
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| 	pipdesc.cull_mode = .back
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| 
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| 	pipdesc.label = 'glsl_shader pipeline'.str
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| 
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| 	app.cube_bind.vertex_buffers[0] = vbuf
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| 	app.cube_bind.index_buffer = ibuf
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| 	app.cube_bind.fs_images[C.SLOT_tex] = app.texture
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| 	app.cube_pip_glsl = gfx.make_pipeline(&pipdesc)
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| 	println('GLSL init DONE!')
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| }
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| 
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| fn draw_cube_glsl(app App) {
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| 	if app.init_flag == false {
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| 		return
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| 	}
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| 
 | |
| 	rot := [f32(app.mouse_y), f32(app.mouse_x)]
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| 
 | |
| 	ws := gg.window_size_real_pixels()
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| 	// ratio := f32(ws.width)/ws.height
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| 	dw := f32(ws.width / 2)
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| 	dh := f32(ws.height / 2)
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| 
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| 	tr_matrix := m4.calc_tr_matrices(dw, dh, rot[0], rot[1], 2.0)
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| 	gfx.apply_viewport(ws.width / 2, 0, ws.width / 2, ws.height / 2, true)
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| 
 | |
| 	// apply the pipline and bindings
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| 	gfx.apply_pipeline(app.cube_pip_glsl)
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| 	gfx.apply_bindings(app.cube_bind)
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| 
 | |
| 	//***************
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| 	// Uniforms
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| 	//***************
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| 	// passing the view matrix as uniform
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| 	// res is a 4x4 matrix of f32 thus: 4*16 byte of size
 | |
| 	vs_uniforms_range := C.sg_range{
 | |
| 		ptr: &tr_matrix
 | |
| 		size: usize(4 * 16)
 | |
| 	}
 | |
| 	gfx.apply_uniforms(C.SG_SHADERSTAGE_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 := C.sg_range{
 | |
| 		ptr: unsafe { &text_res }
 | |
| 		size: usize(4 * 4)
 | |
| 	}
 | |
| 	gfx.apply_uniforms(C.SG_SHADERSTAGE_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)
 | |
| 
 | |
| 	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)
 | |
| 			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)
 | |
| 			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()
 | |
| 
 | |
| 	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()
 | |
| 
 | |
| 	// clear
 | |
| 	mut color_action := C.sg_color_attachment_action{
 | |
| 		action: gfx.Action(C.SG_ACTION_DONTCARE) // C.SG_ACTION_CLEAR)
 | |
| 		value: C.sg_color{
 | |
| 			r: 1.0
 | |
| 			g: 1.0
 | |
| 			b: 1.0
 | |
| 			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
 | |
| 	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 := C.sgl_desc_t{
 | |
| 		max_vertices: 50 * 65536
 | |
| 	}
 | |
| 	sgl.setup(&sgl_desc)
 | |
| 
 | |
| 	// 3d pipeline
 | |
| 	mut pipdesc := C.sg_pipeline_desc{}
 | |
| 	unsafe { C.memset(&pipdesc, 0, sizeof(pipdesc)) }
 | |
| 
 | |
| 	color_state := C.sg_color_state{
 | |
| 		blend: C.sg_blend_state{
 | |
| 			enabled: true
 | |
| 			src_factor_rgb: gfx.BlendFactor(C.SG_BLENDFACTOR_SRC_ALPHA)
 | |
| 			dst_factor_rgb: gfx.BlendFactor(C.SG_BLENDFACTOR_ONE_MINUS_SRC_ALPHA)
 | |
| 		}
 | |
| 	}
 | |
| 	pipdesc.colors[0] = color_state
 | |
| 
 | |
| 	pipdesc.depth = C.sg_depth_state{
 | |
| 		write_enabled: true
 | |
| 		compare: gfx.CompareFunc(C.SG_COMPAREFUNC_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] = 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(mut app)
 | |
| 	app.init_flag = true
 | |
| }
 | |
| 
 | |
| fn cleanup(mut app App) {
 | |
| 	gfx.shutdown()
 | |
| }
 | |
| 
 | |
| /******************************************************************************
 | |
| *
 | |
| * 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)
 | |
| 		}
 | |
| 	}
 | |
| }
 | |
| 
 | |
| /******************************************************************************
 | |
| *
 | |
| * Main
 | |
| *
 | |
| ******************************************************************************/
 | |
| [console] // is needed for easier diagnostics on windows
 | |
| fn main() {
 | |
| 	// App init
 | |
| 	mut app := &App{
 | |
| 		gg: 0
 | |
| 	}
 | |
| 
 | |
| 	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
 | |
| 		cleanup_fn: cleanup
 | |
| 		event_fn: my_event_manager
 | |
| 	)
 | |
| 
 | |
| 	app.ticks = time.ticks()
 | |
| 	app.gg.run()
 | |
| }
 |