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Hello friend

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bloeys
2022-06-30 12:36:04 +04:00
parent a20894a76e
commit bdf1250b3a
6 changed files with 220 additions and 26 deletions
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173
main.go
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@ -8,20 +8,36 @@ import (
"os"
"unicode"
"github.com/bloeys/gglm/gglm"
"github.com/bloeys/nmage/assets"
"github.com/bloeys/nmage/buffers"
"github.com/bloeys/nmage/engine"
"github.com/bloeys/nmage/input"
"github.com/bloeys/nmage/materials"
"github.com/bloeys/nmage/meshes"
"github.com/bloeys/nmage/renderer/rend3dgl"
nmageimgui "github.com/bloeys/nmage/ui/imgui"
"github.com/bloeys/nterm/assert"
"github.com/go-gl/gl/v4.1-core/gl"
"github.com/golang/freetype/truetype"
"github.com/veandco/go-sdl2/sdl"
"golang.org/x/image/font"
"golang.org/x/image/math/fixed"
)
var _ engine.Game = &program{}
type program struct {
shouldRun bool
win *engine.Window
rend *rend3dgl.Rend3DGL
imguiInfo nmageimgui.ImguiInfo
}
func main() {
win, err := engine.CreateOpenGLWindowCentered("nTerm", 1280, 720, engine.WindowFlags_ALLOW_HIGHDPI|engine.WindowFlags_RESIZABLE, rend3dgl.NewRend3DGL())
rend := rend3dgl.NewRend3DGL()
win, err := engine.CreateOpenGLWindowCentered("nTerm", 1280, 720, engine.WindowFlags_ALLOW_HIGHDPI|engine.WindowFlags_RESIZABLE, rend)
if err != nil {
panic("Failed to create window. Err: " + err.Error())
}
@ -31,20 +47,27 @@ func main() {
p := &program{
shouldRun: true,
win: win,
rend: rend,
imguiInfo: nmageimgui.NewImGUI(),
}
engine.Run(p)
}
var _ engine.Game = &program{}
type program struct {
shouldRun bool
win *engine.Window
imguiInfo nmageimgui.ImguiInfo
type FontTexAtlas struct {
Img *image.RGBA
Glyphs map[rune]FontTexAtlasGlyph
GlyphSizeU float32
GlyphSizeV float32
}
type FontTexAtlasGlyph struct {
U float32
V float32
}
var atlas *FontTexAtlas
func (p *program) Init() {
fBytes, err := os.ReadFile("./res/fonts/Consolas.ttf")
@ -59,17 +82,7 @@ func (p *program) Init() {
pointSize := 40
face := truetype.NewFace(f, &truetype.Options{Size: float64(pointSize), DPI: 72})
genTextureAtlas(f, face, pointSize)
}
type FontTexAtlas struct {
Img *image.RGBA
Glyphs map[rune]FontTexAtlasGlyph
}
type FontTexAtlasGlyph struct {
U float32
V float32
atlas = genTextureAtlas(f, face, pointSize)
}
func genTextureAtlas(f *truetype.Font, face font.Face, textSize int) *FontTexAtlas {
@ -106,16 +119,18 @@ func genTextureAtlas(f *truetype.Font, face font.Face, textSize int) *FontTexAtl
//Create atlas
atlas := &FontTexAtlas{
Img: image.NewRGBA(image.Rect(0, 0, atlasSizeX, atlasSizeY)),
Glyphs: make(map[rune]FontTexAtlasGlyph, len(glyphs)),
Img: image.NewRGBA(image.Rect(0, 0, atlasSizeX, atlasSizeY)),
Glyphs: make(map[rune]FontTexAtlasGlyph, len(glyphs)),
GlyphSizeU: float32(charWidth) / float32(atlasSizeX),
GlyphSizeV: float32(lineHeight) / float32(atlasSizeY),
}
//Clear img to white
draw.Draw(atlas.Img, atlas.Img.Bounds(), image.White, image.Point{}, draw.Src)
//Clear background to black
draw.Draw(atlas.Img, atlas.Img.Bounds(), image.Black, image.Point{}, draw.Src)
drawer := &font.Drawer{
Dst: atlas.Img,
Src: image.Black,
Src: image.White,
Face: face,
}
@ -175,11 +190,10 @@ func (p *program) Update() {
}
func (p *program) Render() {
p.drawTextOpenGL(atlas, "Hello friend", gglm.NewVec3(-9, 0, 0))
}
func (p *program) FrameEnd() {
}
func (g *program) GetWindow() *engine.Window {
@ -245,3 +259,112 @@ func getGlyphsFromRanges(ranges [][2]rune) []rune {
return out
}
var glyphMesh *meshes.Mesh
var glyphMat *materials.Material
func (p *program) drawTextOpenGL(atlas *FontTexAtlas, text string, pos *gglm.Vec3) {
if glyphMesh == nil {
glyphMesh = &meshes.Mesh{
Name: "glypQuad",
//VertPos, UV, Color
Buf: buffers.NewBuffer(
buffers.Element{ElementType: buffers.DataTypeVec3},
buffers.Element{ElementType: buffers.DataTypeVec2},
buffers.Element{ElementType: buffers.DataTypeVec4},
),
}
glyphMesh.Buf.SetData([]float32{
-0.5, -0.5, 0,
0, 0,
1, 1, 1, 1,
0.5, -0.5, 0,
1, 0,
1, 1, 1, 1,
-0.5, 0.5, 0,
0, 1,
1, 1, 1, 1,
0.5, 0.5, 0,
1, 1,
1, 1, 1, 1,
})
glyphMesh.Buf.SetIndexBufData([]uint32{
0, 1, 2,
1, 3, 2,
})
}
if glyphMat == nil {
glyphMat = materials.NewMaterial("glyphMat", "./res/shaders/glyph")
}
//Load texture
atlasTex, err := assets.LoadPNGTexture("./atlas.png")
if err != nil {
panic(err.Error())
}
gl.BindTexture(gl.TEXTURE_2D, atlasTex.TexID)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.BindTexture(gl.TEXTURE_2D, 0)
//Prepare to draw
glyphMesh.Buf.Bind()
glyphMat.DiffuseTex = atlasTex.TexID
glyphMat.SetAttribute(glyphMesh.Buf)
projMtx := gglm.Ortho(-10, 10, 10, -10, 0.1, 10)
viewMat := gglm.LookAt(gglm.NewVec3(0, 0, -1), gglm.NewVec3(0, 0, 0), gglm.NewVec3(0, 1, 0))
glyphMat.SetUnifMat4("projMat", &projMtx.Mat4)
glyphMat.SetUnifMat4("viewMat", &viewMat.Mat4)
glyphMat.Bind()
rs := []rune(text)
tr := gglm.NewTrMatId()
tr.Translate(pos)
tr.Scale(gglm.NewVec3(1, 1, 1))
for i := 0; i < len(rs); i++ {
r := rs[i]
g := atlas.Glyphs[r]
if g.U < 0 {
print(g.U)
}
glyphMesh.Buf.SetData([]float32{
-0.5, -0.5, 0,
g.U, g.V,
1, 1, 1, 1,
0.5, -0.5, 0,
g.U + atlas.GlyphSizeU, g.V,
1, 1, 1, 1,
-0.5, 0.5, 0,
g.U, g.V + atlas.GlyphSizeV,
1, 1, 1, 1,
0.5, 0.5, 0,
g.U + atlas.GlyphSizeU, g.V + atlas.GlyphSizeV,
1, 1, 1, 1,
})
glyphMesh.Buf.Bind()
p.rend.Draw(glyphMesh, tr, glyphMat)
tr.Translate(gglm.NewVec3(1, 0, 0))
}
}