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gg: add examples/gg/stars.v

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This commit is contained in:
Delyan Angelov
2021-01-04 12:19:05 +02:00
parent 21d5db43af
commit 3a357d9718
2 changed files with 166 additions and 1 deletions
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33
vlib/gg/image.v
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@@ -174,7 +174,7 @@ pub fn (ctx &Context) draw_image(x f32, y f32, width f32, height f32, img_ &Imag
// TODO remove copy pasta, merge the functions
pub fn (ctx &Context) draw_image_flipped(x f32, y f32, width f32, height f32, img_ &Image) {
if img_.id >= ctx.image_cache.len {
eprintln('gg: draw_image() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
eprintln('gg: draw_image_flipped() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
return
}
img := ctx.image_cache[img_.id] // fetch the image from cache
@@ -207,3 +207,34 @@ pub fn (ctx &Context) draw_image_by_id(x f32, y f32, width f32, height f32, id i
img := ctx.image_cache[id]
ctx.draw_image(x, y, width, height, img)
}
pub fn (ctx &Context) draw_image_3d(x f32, y f32, z f32, width f32, height f32, img_ &Image) {
if img_.id >= ctx.image_cache.len {
eprintln('gg: draw_image_3d() bad img id $img_.id (img cache len = $ctx.image_cache.len)')
return
}
img := ctx.image_cache[img_.id] // fetch the image from cache
if !img.simg_ok {
return
}
u0 := f32(0.0)
v0 := f32(0.0)
u1 := f32(1.0)
v1 := f32(1.0)
x0 := f32(x) * ctx.scale
y0 := f32(y) * ctx.scale
x1 := f32(x + width) * ctx.scale
y1 := f32(y + height) * ctx.scale
//
sgl.load_pipeline(ctx.timage_pip)
sgl.enable_texture()
sgl.texture(img.simg)
sgl.begin_quads()
sgl.c4b(255, 255, 255, 255)
sgl.v3f_t2f(x0, y0, z, u0, v0)
sgl.v3f_t2f(x1, y0, z, u1, v0)
sgl.v3f_t2f(x1, y1, z, u1, v1)
sgl.v3f_t2f(x0, y1, z, u0, v1)
sgl.end()
sgl.disable_texture()
}