func main() {
app := example.Open()
defer app.Close()
bgfx.Init()
defer bgfx.Shutdown()
bgfx.Reset(app.Width, app.Height, bgfx.ResetVSync)
bgfx.SetDebug(bgfx.DebugText)
bgfx.SetViewClear(
0,
bgfx.ClearColor|bgfx.ClearDepth,
0x303030ff,
1.0,
0,
)
bgfx.SetViewRect(0, 0, 0, app.Width, app.Height)
bgfx.Submit(0)
var vd bgfx.VertexDecl
vd.Begin()
vd.Add(bgfx.AttribPosition, 3, bgfx.AttribTypeFloat, false, false)
vd.Add(bgfx.AttribColor0, 4, bgfx.AttribTypeUint8, true, false)
vd.Add(bgfx.AttribTexcoord0, 2, bgfx.AttribTypeFloat, true, false)
vd.End()
uTime := bgfx.CreateUniform("u_time", bgfx.Uniform1f, 1)
uMtx := bgfx.CreateUniform("u_mtx", bgfx.Uniform4x4fv, 1)
uLightDir := bgfx.CreateUniform("u_lightDir", bgfx.Uniform3fv, 1)
defer bgfx.DestroyUniform(uTime)
defer bgfx.DestroyUniform(uMtx)
defer bgfx.DestroyUniform(uLightDir)
prog := assets.LoadProgram("vs_raymarching", "fs_raymarching")
defer bgfx.DestroyProgram(prog)
for app.Continue() {
bgfx.DebugTextClear()
bgfx.DebugTextPrintf(0, 1, 0x4f, app.Title)
bgfx.DebugTextPrintf(0, 2, 0x6f, "Description: Updating shader uniforms.")
bgfx.DebugTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", app.DeltaTime*1000.0)
var (
eye = [3]float32{0, 0, -15.0}
at = [3]float32{0, 0, 0}
up = [3]float32{1, 0, 0}
)
view := mat4.LookAtLH(eye, at, up)
proj := mat4.PerspectiveLH(
cgm.ToRadians(60),
float32(app.Width)/float32(app.Height),
0.1, 100.0,
)
bgfx.SetViewRect(0, 0, 0, app.Width, app.Height)
bgfx.SetViewTransform(0, [16]float32(view), [16]float32(proj))
bgfx.Submit(0)
ortho := mat4.OrthoLH(0, float32(app.Width), float32(app.Height), 0, 0, 100)
bgfx.SetViewRect(1, 0, 0, app.Width, app.Height)
bgfx.SetViewTransform(1, mat4.Identity(), ortho)
viewProj := mat4.Mul(proj, view)
mtx := mat4.RotateXYZ(
cgm.Radians(app.Time),
cgm.Radians(app.Time)*0.37,
0,
)
invMtx := mat4.Inv(mtx)
lightDirModel := [3]float32{-0.4, -0.5, -1.0}
lightDirModelN := vec3.Normal(lightDirModel)
lightDir := mat4.Mul4(invMtx,
[4]float32{
lightDirModelN[0],
lightDirModelN[1],
lightDirModelN[2],
0,
})
invMvp := mat4.Inv(mat4.Mul(viewProj, mtx))
bgfx.SetUniform(uTime, &app.Time, 1)
bgfx.SetUniform(uLightDir, &lightDir, 1)
bgfx.SetUniform(uMtx, &invMvp, 1)
renderScreenSpaceQuad(1, prog, vd, 0, 0, float32(app.Width), float32(app.Height))
bgfx.Frame()
}
}
func main() {
app := example.Open()
defer app.Close()
bgfx.Init()
defer bgfx.Shutdown()
bgfx.Reset(app.Width, app.Height, bgfx.ResetVSync)
bgfx.SetDebug(bgfx.DebugText)
bgfx.SetViewClear(
0,
bgfx.ClearColor|bgfx.ClearDepth,
0x303030ff,
1.0,
0,
)
instancingSupported := bgfx.Caps().Supported&bgfx.CapsInstancing != 0
var vd bgfx.VertexDecl
vd.Begin()
vd.Add(bgfx.AttribPosition, 3, bgfx.AttribTypeFloat, false, false)
vd.Add(bgfx.AttribNormal, 4, bgfx.AttribTypeUint8, true, true)
vd.Add(bgfx.AttribTangent, 4, bgfx.AttribTypeUint8, true, true)
vd.Add(bgfx.AttribTexcoord0, 2, bgfx.AttribTypeInt16, true, true)
vd.End()
example.CalculateTangents(vertices, len(vertices), vd, indices)
vb := bgfx.CreateVertexBuffer(vertices, vd)
defer bgfx.DestroyVertexBuffer(vb)
ib := bgfx.CreateIndexBuffer(indices)
defer bgfx.DestroyIndexBuffer(ib)
const numLights = 4
uTexColor := bgfx.CreateUniform("u_texColor", bgfx.Uniform1iv, 1)
uTexNormal := bgfx.CreateUniform("u_texNormal", bgfx.Uniform1iv, 1)
uLightPosRadius := bgfx.CreateUniform("u_lightPosRadius", bgfx.Uniform4fv, numLights)
uLightRgbInnerR := bgfx.CreateUniform("u_lightRgbInnerR", bgfx.Uniform4fv, numLights)
vsbump := "vs_bump"
if instancingSupported {
vsbump = "vs_bump_instanced"
}
prog := assets.LoadProgram(vsbump, "fs_bump")
defer bgfx.DestroyProgram(prog)
textureColor := assets.LoadTexture("fieldstone-rgba.dds", 0)
textureNormal := assets.LoadTexture("fieldstone-n.dds", 0)
for app.Continue() {
var (
eye = [3]float32{0, 0, -7.0}
at = [3]float32{0, 0, 0}
up = [3]float32{1, 0, 0}
)
view := mat4.LookAtLH(eye, at, up)
proj := mat4.PerspectiveLH(
cgm.ToRadians(60),
float32(app.Width)/float32(app.Height),
0.1, 100.0,
)
bgfx.SetViewTransform(0, view, proj)
bgfx.SetViewRect(0, 0, 0, app.Width, app.Height)
bgfx.DebugTextClear()
bgfx.DebugTextPrintf(0, 1, 0x4f, app.Title)
bgfx.DebugTextPrintf(0, 2, 0x6f, "Description: Loading textures.")
bgfx.DebugTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", app.DeltaTime*1000.0)
bgfx.Submit(0)
const halfPi = math.Pi / 2
var lightPosRadius [4][4]float32
for i := 0; i < numLights; i++ {
fi := float32(i)
lightPosRadius[i][0] = float32(math.Sin(float64(app.Time*(0.1+fi*0.17)+fi*halfPi*1.37)) * 3.0)
lightPosRadius[i][1] = float32(math.Cos(float64(app.Time*(0.2+fi*0.29)+fi*halfPi*1.49)) * 3.0)
lightPosRadius[i][2] = -2.5
lightPosRadius[i][3] = 3.0
}
bgfx.SetUniform(uLightPosRadius, &lightPosRadius, numLights)
lightRgbInnerR := [4][4]float32{
{1.0, 0.7, 0.2, 0.8},
{0.7, 0.2, 1.0, 0.8},
{0.2, 1.0, 0.7, 0.8},
{1.0, 0.4, 0.2, 0.8},
}
bgfx.SetUniform(uLightRgbInnerR, &lightRgbInnerR, numLights)
if instancingSupported {
for y := 0; y < 3; y++ {
const numInstances = 3
const instanceStride = 64
idb := bgfx.AllocInstanceDataBuffer(numInstances, instanceStride)
for x := 0; x < 3; x++ {
mtx := mat4.RotateXYZ(
cgm.Radians(app.Time)*0.023+cgm.Radians(x)*0.21,
cgm.Radians(app.Time)*0.03+cgm.Radians(y)*0.37,
0,
)
mtx[12] = -3 + float32(x)*3
mtx[13] = -3 + float32(y)*3
mtx[14] = 0
binary.Write(&idb, binary.LittleEndian, mtx)
}
bgfx.SetInstanceDataBuffer(idb)
bgfx.SetProgram(prog)
bgfx.SetVertexBuffer(vb)
bgfx.SetIndexBuffer(ib)
bgfx.SetTexture(0, uTexColor, textureColor)
bgfx.SetTexture(1, uTexNormal, textureNormal)
bgfx.SetState(bgfx.StateDefault & (^bgfx.StateCullMask))
bgfx.Submit(0)
}
} else {
for y := 0; y < 3; y++ {
for x := 0; x < 3; x++ {
mtx := mat4.RotateXYZ(
cgm.Radians(app.Time)*0.023+cgm.Radians(x)*0.21,
cgm.Radians(app.Time)*0.03+cgm.Radians(y)*0.37,
0,
)
mtx[12] = -3 + float32(x)*3
mtx[13] = -3 + float32(y)*3
mtx[14] = 0
bgfx.SetTransform([16]float32(mtx))
bgfx.SetProgram(prog)
bgfx.SetVertexBuffer(vb)
bgfx.SetIndexBuffer(ib)
bgfx.SetTexture(0, uTexColor, textureColor)
bgfx.SetTexture(1, uTexNormal, textureNormal)
bgfx.SetState(bgfx.StateDefault & (^bgfx.StateCullMask))
bgfx.Submit(0)
}
}
}
bgfx.Frame()
}
}
func main() {
app := example.Open()
defer app.Close()
bgfx.Init()
defer bgfx.Shutdown()
bgfx.Reset(app.Width, app.Height, bgfx.ResetVSync)
bgfx.SetDebug(bgfx.DebugText)
bgfx.SetViewClear(
0,
bgfx.ClearColor|bgfx.ClearDepth,
0x303030ff,
1.0,
0,
)
var vd bgfx.VertexDecl
vd.Begin()
vd.Add(bgfx.AttribPosition, 3, bgfx.AttribTypeFloat, false, false)
vd.Add(bgfx.AttribColor0, 4, bgfx.AttribTypeUint8, true, false)
vd.End()
vb := bgfx.CreateVertexBuffer(vertices, vd)
defer bgfx.DestroyVertexBuffer(vb)
ib := bgfx.CreateIndexBuffer(indices)
defer bgfx.DestroyIndexBuffer(ib)
prog := assets.LoadProgram("vs_instancing", "fs_instancing")
defer bgfx.DestroyProgram(prog)
caps := bgfx.Caps()
for app.Continue() {
var (
eye = [3]float32{0, 0, -35.0}
at = [3]float32{0, 0, 0}
up = [3]float32{1, 0, 0}
)
view := mat4.LookAtLH(eye, at, up)
proj := mat4.PerspectiveLH(
cgm.ToRadians(60),
float32(app.Width)/float32(app.Height),
0.1, 100,
)
bgfx.SetViewTransform(0, view, proj)
bgfx.SetViewRect(0, 0, 0, app.Width, app.Height)
bgfx.DebugTextClear()
bgfx.DebugTextPrintf(0, 1, 0x4f, app.Title)
bgfx.DebugTextPrintf(0, 2, 0x6f, "Description: Geometry instancing.")
bgfx.DebugTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", app.DeltaTime*1000.0)
bgfx.Submit(0)
if caps.Supported&bgfx.CapsInstancing == 0 {
color := uint8(0x01)
if uint32(app.Time*2)&1 != 0 {
color = 0x1f
}
bgfx.DebugTextPrintf(0, 5, color, " Instancing is not supported by GPU. ")
bgfx.Frame()
continue
}
const stride = 80
idb := bgfx.AllocInstanceDataBuffer(11*11, stride)
// Submit 11x11 cubes
time64 := float64(app.Time)
for y := 0; y < 11; y++ {
for x := 0; x < 11; x++ {
mtx := mat4.RotateXYZ(
cgm.Radians(app.Time)+cgm.Radians(x)*0.21,
cgm.Radians(app.Time)+cgm.Radians(y)*0.37,
0,
)
mtx[12] = -15 + float32(x)*3
mtx[13] = -15 + float32(y)*3
mtx[14] = 0
color := [4]float32{
float32(math.Sin(time64+float64(x)/11.0)*0.5 + 0.5),
float32(math.Cos(time64+float64(y)/11.0)*0.5 + 0.5),
float32(math.Sin(time64*3.0)*0.5 + 0.5),
1.0,
}
binary.Write(&idb, binary.LittleEndian, mtx)
binary.Write(&idb, binary.LittleEndian, color)
}
}
bgfx.SetProgram(prog)
bgfx.SetVertexBuffer(vb)
bgfx.SetIndexBuffer(ib)
bgfx.SetInstanceDataBuffer(idb)
bgfx.SetState(bgfx.StateDefault)
bgfx.Submit(0)
bgfx.Frame()
}
}