func (video *Video) initGL() {
log.Print("Initing")
video.fpsmanager = gfx.NewFramerate()
video.fpsmanager.SetFramerate(60)
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
log.Print("Creating program")
video.prog = createProgram(vertShaderSrcDef, fragShaderSrcDef)
log.Print("Attrib loc 1")
posAttrib := attribLocation(video.prog, "vPosition")
log.Print("Attrib loc 2")
texCoordAttr := attribLocation(video.prog, "vTexCoord")
log.Print("Uniform loc 1")
paletteLoc := uniformLocation(video.prog, "palette")
log.Print("Uniform loc 2")
video.textureUni = uniformLocation(video.prog, "texture")
log.Print("Gen Texture")
video.texture = genTexture()
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, video.texture)
log.Print("TexParam")
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.UseProgram(video.prog)
gl.EnableVertexAttribArray(posAttrib)
gl.EnableVertexAttribArray(texCoordAttr)
gl.Uniform3iv(paletteLoc, nes.SPaletteRgb)
log.Print("VertBO")
vertVBO := genBuffer()
checkGLError()
gl.BindBuffer(gl.ARRAY_BUFFER, vertVBO)
verts := f32.Bytes(binary.LittleEndian, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0)
gl.BufferData(gl.ARRAY_BUFFER, verts, gl.STATIC_DRAW)
textCoorBuf := genBuffer()
checkGLError()
gl.BindBuffer(gl.ARRAY_BUFFER, textCoorBuf)
texVerts := f32.Bytes(binary.LittleEndian, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0)
gl.BufferData(gl.ARRAY_BUFFER, texVerts, gl.STATIC_DRAW)
gl.VertexAttribPointer(posAttrib, 2, gl.FLOAT, false, 0, 0)
gl.VertexAttribPointer(texCoordAttr, 2, gl.FLOAT, false, 0, 0)
log.Print("Started")
}
func (e *Engine) Start() {
var err error
e.shader.program, err = LoadProgram("shader.v.glsl", "shader.f.glsl")
if err != nil {
panic(fmt.Sprintln("LoadProgram failed:", err))
}
e.shader.models, err = wavefront.Read("spiritframe.obj")
check(err)
e.shader.projectionmatrix = gl.GetUniformLocation(e.shader.program, "u_projectionMatrix")
e.shader.viewmatrix = gl.GetUniformLocation(e.shader.program, "u_viewMatrix")
e.shader.modelmatrix = gl.GetUniformLocation(e.shader.program, "u_modelMatrix")
e.shader.normalmatrix = gl.GetUniformLocation(e.shader.program, "u_normalMatrix")
e.shader.lightdir = gl.GetUniformLocation(e.shader.program, "u_lightDirection")
e.shader.lightmatrix = gl.GetUniformLocation(e.shader.program, "u_lightmatrix")
e.shader.vertCoord = gl.GetAttribLocation(e.shader.program, "a_vertex")
e.shader.normal = gl.GetAttribLocation(e.shader.program, "a_normal")
e.shader.texcoord = gl.GetAttribLocation(e.shader.program, "a_texCoord")
for _, model := range e.shader.models {
for _, group := range model.Groups {
//颜色
color := group.Material.Ambient
//顶点
data := f32.Bytes(binary.LittleEndian, group.Vertexes...)
vertexCount := len(group.Vertexes) / 3
databuf := gl.CreateBuffer()
gl.BindBuffer(gl.ARRAY_BUFFER, databuf)
gl.BufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW)
//UV坐标
textcoords := f32.Bytes(binary.LittleEndian, group.Textcoords...)
uvbuf := gl.CreateBuffer()
gl.BindBuffer(gl.ARRAY_BUFFER, uvbuf)
gl.BufferData(gl.ARRAY_BUFFER, textcoords, gl.STATIC_DRAW)
//发现坐标
normals := f32.Bytes(binary.LittleEndian, group.Normals...)
normalbuf := gl.CreateBuffer()
gl.BindBuffer(gl.ARRAY_BUFFER, normalbuf)
gl.BufferData(gl.ARRAY_BUFFER, normals, gl.STATIC_DRAW)
tex, _ := LoadTexture(group.Material.Texturefile)
e.shape.Objs = append(e.shape.Objs, Obj{vcount: vertexCount, coord: databuf, color: color, uvcoord: uvbuf, tex: tex, normal: normalbuf})
}
}
}
func (e *Engine) Start() {
var err error
e.shader.program, err = LoadProgram("shader.v.glsl", "shader.f.glsl")
if err != nil {
panic(fmt.Sprintln("LoadProgram failed:", err))
}
e.shader.models, err = wavefront.Read("girl.obj")
check(err)
e.shader.vertCoord = gl.GetAttribLocation(e.shader.program, "vertCoord")
e.shader.vertTexCoord = gl.GetAttribLocation(e.shader.program, "vertTexCoord")
e.shader.projection = gl.GetUniformLocation(e.shader.program, "projection")
e.shader.view = gl.GetUniformLocation(e.shader.program, "view")
e.shader.modelx = gl.GetUniformLocation(e.shader.program, "modelx")
e.shader.modely = gl.GetUniformLocation(e.shader.program, "modely")
e.shader.color = gl.GetUniformLocation(e.shader.program, "color")
e.shader.useuv = gl.GetUniformLocation(e.shader.program, "useuv")
for _, model := range e.shader.models {
for _, group := range model.Groups {
//颜色
color := group.Material.Ambient
//顶点
data := f32.Bytes(binary.LittleEndian, group.Vertexes...)
vertexCount := len(group.Vertexes) / 3
databuf := gl.CreateBuffer()
gl.BindBuffer(gl.ARRAY_BUFFER, databuf)
gl.BufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW)
//UV坐标
textcoords := f32.Bytes(binary.LittleEndian, group.Textcoords...)
uvbuf := gl.CreateBuffer()
gl.BindBuffer(gl.ARRAY_BUFFER, uvbuf)
gl.BufferData(gl.ARRAY_BUFFER, textcoords, gl.STATIC_DRAW)
//贴图文件
var useuv bool
tex, err := LoadTexture(group.Material.Texturefile)
if err != nil {
useuv = false
} else {
useuv = true
}
e.shape.Objs = append(e.shape.Objs, Obj{vcount: vertexCount, coord: databuf, color: color, useuv: useuv, uvcoord: uvbuf, tex: tex})
}
}
}
func (video *Video) drawFrame() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.UseProgram(video.prog)
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, video.texture)
log.Print("Reading")
frame := <-video.pixelBuffer
buf := make([]float32, len(frame))
log.Print("Read frame")
for k, v := range frame {
buf[k] = float32(v)
}
log.Print("Writing")
if video.pixelBuffer != nil {
gl.TexImage2D(gl.TEXTURE_2D, 0, 256, 256, gl.RGBA,
gl.UNSIGNED_SHORT_4_4_4_4, f32.Bytes(binary.LittleEndian, buf...))
}
log.Print("Wrote")
gl.DrawArrays(gl.TRIANGLES, 0, 6)
video.fpsmanager.FramerateDelay()
}
func (e *Engine) Start() {
var err error
e.shader.program, err = LoadProgram("shader.v.glsl", "shader.f.glsl")
if err != nil {
panic(fmt.Sprintln("LoadProgram failed:", err))
}
e.shader.models, err = wavefront.Read("gopher.obj")
check(err)
e.shader.vertCoord = gl.GetAttribLocation(e.shader.program, "vertCoord")
e.shader.projection = gl.GetUniformLocation(e.shader.program, "projection")
e.shader.view = gl.GetUniformLocation(e.shader.program, "view")
e.shader.modelx = gl.GetUniformLocation(e.shader.program, "modelx")
e.shader.modely = gl.GetUniformLocation(e.shader.program, "modely")
e.shader.color = gl.GetUniformLocation(e.shader.program, "color")
for _, model := range e.shader.models {
for _, group := range model.Groups {
data := f32.Bytes(binary.LittleEndian, group.Vertexes...)
color := group.Material.Ambient
vertexCount := len(data)
databuf := gl.CreateBuffer()
e.shape.bufs = append(e.shape.bufs, Buf{vertexCount, databuf, color})
gl.BindBuffer(gl.ARRAY_BUFFER, databuf)
gl.BufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW)
}
}
}
func (r *Key) chart() {
keys := []float32{
// position // Tex cordinates
// top
r.x, r.y, r.z, 0, 0, // top left
r.x + r.length, r.y, r.z, 1, 0, // top right
r.x, r.y + r.width, r.z, 0, 1, // bottom left
r.x + r.length, r.y + r.width, r.z, 1, 1, // bottom right
//front
r.x + r.length, r.y, r.z, 1, 0,
r.x + r.length, r.y + r.width, r.z, 1, 1,
r.x + r.length, r.y, r.z - r.height, 1, 0,
r.x + r.length, r.y + r.width, r.z - r.height, 1, 1,
//left
r.x, r.y + r.width, r.z, 0, 1,
r.x + r.length, r.y + r.width, r.z, 1, 1,
r.x, r.y + r.width, r.z - r.height, 1, 0,
r.x + r.length, r.y + r.width, r.z - r.height, 0, 0,
//right
r.x, r.y, r.z, 0, 0,
r.x + r.length, r.y, r.z, 1, 0,
r.x, r.y, r.z - r.height, 0, 1,
r.x + r.length, r.y, r.z - r.height, 1, 1,
}
r.data = append(r.data, f32.Bytes(binary.LittleEndian, keys...)...)
}
func makeTriangleData() []byte {
halfBase, halfHeight := computeTriangleLengths()
return f32.Bytes(binary.LittleEndian,
-halfBase, -halfHeight, 0.0,
0.0, halfHeight, 0.0,
halfBase, -halfHeight, 0.0,
)
}
func circleTriangle() {
x1, y1 := getXY(angle)
x2, y2 := getXY(angle + math.Pi*2*1/3)
x3, y3 := getXY(angle + math.Pi*2*2/3)
triangleData = f32.Bytes(binary.LittleEndian,
x1*0.4, y1*0.4, 0.0,
x2*0.4, y2*0.4, 0.0,
x3*0.4, y3*0.4, 0.0,
)
angle += math.Pi / 200
if angle > math.Pi*2 {
angle -= math.Pi * 2
}
}
// makeWhiteKeyVector creates 1) the OpenGL coordinates for the key in portrait and landscape mode
// 2) the box of the actual key and 3) the greater outer outline of the key which includes the surrounding gap
func makeWhiteKeyVector(width float32, count int) ([]byte, util.Boundary, util.Boundary) {
keyOutline := util.Boundary{BottomY: 0.0, TopY: TopOfKey}
// Which white key are we on. Start at that offset.
offset := (float32(count)) / NumberOfWhiteKeys * util.MaxGLSize
// Width of window / NumberOfWhiteKeys = width of each white key = w_k
widthOfOneKey := width / NumberOfWhiteKeys
keyOuterBoundary := util.Boundary{BottomY: 0.0, TopY: TopOfKey, LeftX: offset,
RightX: offset + widthOfOneKey/width*util.MaxGLSize}
// want KeytoGapRatio% of the width of a key to be white (allow for black separation between keys) = p
// Top left & bottom left (x = (offset + ((1-p) / 2) *w_k) / width * MaxGLSize)
// Top right & bottom right (x = (offset + w_k-(w_k* (1-p) / 2)) / width * MaxGLsize)
keyOutline.RightX = offset + (widthOfOneKey-(widthOfOneKey*(1-KeytoGapRatio)/2))/width*util.MaxGLSize
keyOutline.LeftX = offset + (widthOfOneKey*(1-KeytoGapRatio)/2)/width*util.MaxGLSize
return f32.Bytes(binary.LittleEndian, makeCoordsForBothOrientation(keyOutline)...),
keyOutline, keyOuterBoundary
}
// makeBlackKeyVector creates 1) the OpenGL coordinates for the key in portrait and landscape mode
// 2) the box of the actual key and 3) the greater outer outline of the key which includes the surrounding gap
func makeBlackKeyVector(leftWhiteKey Key) ([]byte, util.Boundary, util.Boundary) {
// First, let's get the width of the white key.
widthOfWhiteKey := leftWhiteKey.GetOuterBoundary().RightX - leftWhiteKey.GetOuterBoundary().LeftX
// Determine the width of the blackKey with whiteKeyToBlackKeyWidthRatio
widthOfBlackKey := whiteKeyToBlackKeyWidthRatio * widthOfWhiteKey
// Use the end of the white key as the center of the black key and add the offsets to the sides.
keyOuterBoundary := util.Boundary{BottomY: TopOfKey - whiteKeyToBlackKeyLengthRatio*TopOfKey,
TopY: TopOfKey,
LeftX: leftWhiteKey.GetOuterBoundary().RightX - (widthOfBlackKey / 2),
RightX: leftWhiteKey.GetOuterBoundary().RightX + (widthOfBlackKey / 2)}
// Use the same gap the white key uses for the black key
gap := leftWhiteKey.GetOutline().LeftX - leftWhiteKey.GetOuterBoundary().LeftX
keyOutline := util.Boundary{TopY: TopOfKey, BottomY: keyOuterBoundary.BottomY + gap,
LeftX: keyOuterBoundary.LeftX + gap, RightX: keyOuterBoundary.RightX - gap}
return f32.Bytes(binary.LittleEndian, makeCoordsForBothOrientation(keyOutline)...),
keyOutline, keyOuterBoundary
}
gl.EnableVertexAttribArray(glimage.pos) gl.VertexAttribPointer(glimage.pos, 2, gl.FLOAT, false, 0, 0) gl.BindBuffer(gl.ARRAY_BUFFER, glimage.quadUV) gl.EnableVertexAttribArray(glimage.inUV) gl.VertexAttribPointer(glimage.inUV, 2, gl.FLOAT, false, 0, 0) gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4) gl.DisableVertexAttribArray(glimage.pos) gl.DisableVertexAttribArray(glimage.inUV) } var quadXYCoords = f32.Bytes(binary.LittleEndian, -1, +1, // top left +1, +1, // top right -1, -1, // bottom left +1, -1, // bottom right ) var quadUVCoords = f32.Bytes(binary.LittleEndian, 0, 0, // top left 1, 0, // top right 0, 1, // bottom left 1, 1, // bottom right ) const vertexShader = `#version 100 uniform mat3 mvp; uniform mat3 uvp; attribute vec3 pos; attribute vec2 inUV;
var cubeData = f32.Bytes(binary.LittleEndian, //三角 0.5, 0.5, 0.5, 0.5, 0.5, -0.5, 0.5, 0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5, 0.5, 0.5, -0.5, 0.5, 0.5, 0.5, 0.5, -0.5, 0.5, 0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5, 0.5, 0.5, 0.5, 0.5, 0.5, -0.5, 0.5, 0.5, 0.5, 0.5, -0.5, -0.5, 0.5, -0.5, 0.5, -0.5, -0.5, -0.5, -0.5, -0.5, 0.5, -0.5, 0.5, -0.5, -0.5, 0.5, )
void main() {
gl_FragColor = color;
}`
coordsPerVertex = 3
vertexCount = 3
triangleSide float32 = 0.4 // In OpenGL coordinates where the full screen in of size 2 [-1, 1]
bannerWidth = 0.1
)
var (
triangleHeight = float32(math.Sqrt(3)) * triangleSide / 2
triangleCenterHeight = triangleSide / (2 * float32(math.Sqrt(3)))
triangleData = f32.Bytes(binary.LittleEndian,
-triangleSide/2, -triangleHeight/2, 0, // bottom left
0, triangleHeight/2, 0, // top
triangleSide/2, -triangleHeight/2, 0, // bottom right
)
topBannerData = f32.Bytes(binary.LittleEndian,
-1, 1, 0,
1, 1, 0,
1, 1-bannerWidth, 0,
-1, 1-bannerWidth, 0,
)
leftBannerData = f32.Bytes(binary.LittleEndian,
-1, 1, 0,
-1+bannerWidth, 1, 0,
-1+bannerWidth, -1, 0,
-1, -1, 0,
)
)
var triangleData = f32.Bytes(binary.LittleEndian, // front -1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 0, 1, 1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 0, 1, 1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 0, 1, 1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 0, 1, -1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 0, 1, -1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 0, 1, // top -1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 1, 0, 1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 1, 0, 1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 1, 0, 1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 1, 0, -1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 1, 0, -1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, 1, 0, // back -1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 0, -1, 1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 0, -1, 1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 0, -1, 1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 0, -1, -1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 0, -1, -1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, 0, -1, // bottom -1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, -1, 0, 1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, -1, 0, 1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, -1, 0, 1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, -1, 0, -1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 0, -1, 0, -1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 0, -1, 0, // left -1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 1, 0, 0, -1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, 1, 0, 0, -1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 1, 0, 0, -1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, 1, 0, 0, -1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, 1, 0, 0, -1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, 1, 0, 0, // right 1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, -1, 0, 0, 1.0, -1.0, -1.0, 0.98, 0.972, 0.94, 1, -1, 0, 0, 1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, -1, 0, 0, 1.0, 1.0, -1.0, 0.98, 0.972, 0.94, 1, -1, 0, 0, 1.0, 1.0, 1.0, 0.98, 0.972, 0.94, 1, -1, 0, 0, 1.0, -1.0, 1.0, 0.98, 0.972, 0.94, 1, -1, 0, 0, )
type 指定数组中每个组件的数据类型。可用的符号常量有GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT,GL_UNSIGNED_SHORT, GL_FIXED, 和 GL_FLOAT，初始值为GL_FLOAT。
normalized 指定当被访问时，固定点数据值是否应该被归一化（GL_TRUE）或者直接转换为固定点值（GL_FALSE）。
stride 指定连续顶点属性之间的偏移量。如果为0，那么顶点属性会被理解为：它们是紧密排列在一起的。初始值为0。
pointer 指定第一个组件在数组的第一个顶点属性中的偏移量。该数组与GL_ARRAY_BUFFER绑定，储存于缓冲区中。初始值为0；
*/
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0) //更新position值
gl.DrawArrays(gl.LINES, 0, vertexCount)
gl.DisableVertexAttribArray(position)
debug.DrawFPS(c)
}
var lineData = f32.Bytes(binary.LittleEndian, //三角
0.0, 0.5, 0.0, // top left
-0.5, -0.5, 0.0, // bottom left
-0.5, -0.5, 0.0, // bottom left
0.5, -0.5, 0.0, // bottom right
0.5, -0.5, 0.0, // bottom right
0.0, 0.5, 0.0, // top left
)
const (
coordsPerVertex = 3 //点坐标
)
//两类着色器编程使用GLSL(GL Shader Language，GL着色语言)，它是OpenGL的一部分。与C或Java不同，GLSL必须在运行时编译，这意味着每次启动程序，所有的着色器将重新编译。
//顶点(vertex)着色器，它将作用于每个顶点上
//vec2即2个值,vec4即4个值
const vertexShader = `#version 100
uniform mat4 scan;
attribute vec4 position;
void main() {
mu.Unlock()
c := &http.Client{Transport: transport}
_, err := c.Do(req)
if err != nil {
fmt.Println(err)
}
mu.Lock()
req = nil
mu.Unlock()
}
var rectData = f32.Bytes(binary.LittleEndian,
0, 0,
0, 0.2,
0.2, 0,
0.2, 0.2,
)
const vertexShader = `#version 100
uniform vec2 offset;
attribute vec4 position;
void main() {
// offset comes in with x/y values between 0 and 1.
// position bounds are -1 to 1.
vec4 offset4 = vec4(2.0*offset.x-1.0, 1.0-2.0*offset.y, 0, 0);
gl_Position = position + offset4;
}`
const fragmentShader = `#version 100
gl.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0) //更新position值 //gl.DisableVertexAttribArray(position) gl.BindBuffer(gl.ARRAY_BUFFER, colorbuf) gl.EnableVertexAttribArray(color) gl.VertexAttribPointer(color, colorsPerVertex, gl.FLOAT, false, 0, 0) //更新color值 gl.DrawArrays(gl.TRIANGLES, 0, vertexCount) //gl.DisableVertexAttribArray(color) debug.DrawFPS(c) } var triangleData = f32.Bytes(binary.LittleEndian, //三角 0.0, 0.5, 0.0, // top left -0.5, -0.5, 0.0, // bottom left 0.5, -0.5, 0.0, // bottom right ) var colorData = f32.Bytes(binary.LittleEndian, //过渡色 1.0, 0.0, 0.0, 1, // red 0.0, 1.0, 0.0, 1, // green 0.0, 0.0, 1.0, 1, // blue ) const ( coordsPerVertex = 3 //坐标属性个数 x y z vertexCount = 3 //点数 colorsPerVertex = 4 //颜色属性个数 r g b a )
glctx.Uniform2f(offset, touchX/float32(sz.WidthPx), touchY/float32(sz.HeightPx))
glctx.BindBuffer(gl.ARRAY_BUFFER, buf)
glctx.EnableVertexAttribArray(position)
glctx.VertexAttribPointer(position, coordsPerVertex, gl.FLOAT, false, 0, 0)
glctx.DrawArrays(gl.TRIANGLES, 0, vertexCount)
glctx.DisableVertexAttribArray(position)
statusPainter.Draw(sz, actionBarPad, statusFaceOpt)
fps.Draw(sz)
}
var triangleData = f32.Bytes(binary.LittleEndian,
0.0, 0.4, 0.0, // top left
0.0, 0.0, 0.0, // bottom left
0.4, 0.0, 0.0, // bottom right
)
const (
coordsPerVertex = 3
vertexCount = 3
)
const vertexShader = `#version 100
uniform vec2 offset;
attribute vec4 position;
void main() {
// offset comes in with x/y values between 0 and 1.
// position bounds are -1 to 1.
package main import ( "encoding/binary" "golang.org/x/mobile/exp/f32" ) var dswastikaData = f32.Bytes(binary.LittleEndian, 0.0, -0.5, 0.0, 0.0, 0.5, 0.0, -0.5, -0.5, 0.0, 0.0, -0.5, 0.0, 0.0, 0.5, 0.0, 0.5, 0.5, 0.0, -0.5, 0.5, 0.0, -0.5, 0.0, 0.0, -0.5, 0.0, 0.0, 0.5, 0.0, 0.0, 0.5, 0.0, 0.0, 0.5, -0.5, 0.0, ) var swastikaData = f32.Bytes(binary.LittleEndian, -0.4, -0.2, 0.0, 0.0, 0.4, 0.0, -0.4, -0.2, 0.0, 0.4, -0.2, 0.0, 0.0, 0.4, 0.0, 0.4, -0.2, 0.0, -0.4, 0.2, 0.0, 0.4, 0.2, 0.0, -0.4, 0.2, 0.0, 0.0, -0.4, 0.0, 0.0, -0.4, 0.0, 0.4, 0.2, 0.0, ) var quadData = f32.Bytes(binary.LittleEndian, -0.3, -0.3, 0.0, 0.3, -0.3, 0.0, 0.3, 0.3, 0.0,
var cubeData = f32.Bytes(binary.LittleEndian, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, )