func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity()
gl.Translatef(-1.5, 0, -6)
gl.Rotatef(trisAngle, 0, 1, 0)
gl.Begin(gl.TRIANGLES)
gl.Color3f(1, 0, 0)
gl.Vertex3f(0, 1, 0)
gl.Color3f(0, 1, 0)
gl.Vertex3f(-1, -1, 0)
gl.Color3f(0, 0, 1)
gl.Vertex3f(1, -1, 0)
gl.End()
gl.LoadIdentity()
gl.Translatef(1.5, 0, -6)
gl.Rotatef(quadAngle, 1, 0, 0)
gl.Color3f(0.5, 0.5, 1.0)
gl.Begin(gl.QUADS)
gl.Vertex3f(-1, 1, 0)
gl.Vertex3f(1, 1, 0)
gl.Vertex3f(1, -1, 0)
gl.Vertex3f(-1, -1, 0)
gl.End()
trisAngle += 0.2
quadAngle -= 0.15
glfw.SwapBuffers()
}
func renderSwitch(s *Switch) {
gl.LoadIdentity()
// TODO constant
v := SwitchSize / 2
x, y := float32(s.X+v), float32(s.Y+v)
gl.Translatef(x, y, 0)
// Render the switch
gl.Color3f(1, 1, 1)
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex2d(0, 0)
vv := float64(v)
for i := float64(0); i <= SwitchSegments; i++ {
a := 2 * math.Pi * i / SwitchSegments
gl.Vertex2d(math.Sin(a)*vv, math.Cos(a)*vv)
}
gl.End()
if LineWidth != 0 {
// Render the shape
gl.Color3i(0, 0, 0)
gl.LineWidth(LineWidth)
gl.Begin(gl.LINE_LOOP)
for i := float64(0); i <= SwitchSegments; i++ {
a := 2 * math.Pi * i / SwitchSegments
gl.Vertex2d(math.Sin(a)*vv, math.Cos(a)*vv)
}
gl.End()
}
// Write the switch name
gl.LoadIdentity()
w, h := fonts[6].Metrics(s.name)
gl.Color3i(0, 0, 0)
fonts[6].Printf(x-float32(w)/2, y-float32(h)/2+2, s.name)
}
func draw() { // 从这里开始进行所有的绘制
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) // 清除屏幕和深度缓存
gl.LoadIdentity() // 重置当前的模型观察矩阵
gl.Translatef(-1.5, 0.0, -6.0) // 左移 1.5 单位，并移入屏幕 6.0
gl.Rotatef(rtri, 0.0, 1.0, 0.0) // 绕Y轴旋转三角形
gl.Begin(gl.TRIANGLES) // 绘制三角形
gl.Color3f(1.0, 0.0, 0.0) // 设置当前色为红色
gl.Vertex3f(0.0, 1.0, 0.0) // 上顶点
gl.Color3f(0.0, 1.0, 0.0) // 设置当前色为绿色
gl.Vertex3f(-1.0, -1.0, 0.0) // 左下
gl.Color3f(0.0, 0.0, 1.0) // 设置当前色为蓝色
gl.Vertex3f(1.0, -1.0, 0.0) // 右下
gl.End() // 三角形绘制结束
gl.LoadIdentity() // 重置当前的模型观察矩阵
gl.Translatef(1.5, 0.0, -6.0) // 右移1.5单位,并移入屏幕 6.0
gl.Rotatef(rquad, 1.0, 0.0, 0.0) // 绕X轴旋转四边形
gl.Color3f(0.5, 0.5, 1.0) // 一次性将当前色设置为蓝色
gl.Begin(gl.QUADS) // 绘制正方形
gl.Vertex3f(-1.0, 1.0, 0.0) // 左上
gl.Vertex3f(1.0, 1.0, 0.0) // 右上
gl.Vertex3f(1.0, -1.0, 0.0) // 左下
gl.Vertex3f(-1.0, -1.0, 0.0) // 右下
gl.End()
rtri += 0.2 // 增加三角形的旋转变量
rquad -= 0.15 // 减少四边形的旋转变量
}
func renderCorner(color ColorDef, ww, hh, start float64, radius, lineWidth float32) {
setColor(color)
max := BlockCornerSegments * (start + 1)
// Render the corner
gl.Begin(gl.TRIANGLE_FAN)
gl.Vertex2d(ww, hh)
for i := start * BlockCornerSegments; i <= max; i++ {
a := math.Pi / 2 * i / BlockCornerSegments
x := math.Cos(a) * float64(radius)
y := math.Sin(a) * float64(radius)
gl.Vertex2d(ww+x, hh+y)
}
gl.End()
if lineWidth != 0 {
// Render the shape
gl.LineWidth(lineWidth)
gl.Color3i(0, 0, 0)
gl.Begin(gl.LINE_STRIP)
for i := start * BlockCornerSegments; i <= max; i++ {
a := math.Pi / 2 * i / BlockCornerSegments
x := math.Cos(a) * float64(radius)
y := math.Sin(a) * float64(radius)
gl.Vertex2d(ww+x, hh+y)
}
gl.End()
}
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) /// 清除屏幕及深度缓存
gl.LoadIdentity() /// 重置模型观察矩阵
gl.Translatef(-1.5, 0, -6) /// 左移 1.5 单位，并移入屏幕 6.0
gl.Begin(gl.TRIANGLES) /// 绘制三角形
gl.Color3f(1, 0, 0) /// 设置当前色为红色
gl.Vertex3f(0, 1, 0) ///上顶点
gl.Color3f(0, 1, 0) /// 设置当前色为绿色
gl.Vertex3f(-1, -1, 0) /// 左下
gl.Color3f(0, 0, 1) ///设置当前色为蓝色
gl.Vertex3f(1, -1, 0) ///右下
gl.End() ///三角形绘制结束,三角形将被填充。
//但是因为每个顶点有不同的颜色，因此看起来颜色从每个角喷出，并刚好在三角形的中心汇合，三种颜色相互混合。这就是平滑着色。
gl.Translatef(3, 0, 0) ///右移3单位
gl.Color3f(0.5, 0.5, 1.0) ///一次性将当前色设置为蓝色
/// @note 顺时针绘制的正方形意味着我们所看见的是四边形的背面
gl.Begin(gl.QUADS) ///绘制正方形
gl.Vertex3f(-1, 1, 0) /// 左上
gl.Vertex3f(1, 1, 0) /// 右上
gl.Vertex3f(1, -1, 0) /// 右下
gl.Vertex3f(-1, -1, 0) /// 左下
gl.End() ///正方形绘制结束
glfw.SwapBuffers() ///必须交换显示区才能展现
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
texture.Bind(gl.TEXTURE_2D)
for loop = 0; loop < num; loop++ {
gl.LoadIdentity() // 绘制每颗星星之前，重置模型观察矩阵
gl.Translatef(0.0, 0.0, zoom) // 深入屏幕里面
gl.Rotatef(tilt, 1.0, 0.0, 0.0) // 倾斜视角
gl.Rotatef(ztilt, 0.0, 0.0, 1.0) // 倾斜视角
gl.Rotatef(star[loop].angle, 0.0, 1.0, 0.0) // 旋转至当前所画星星的角度
gl.Translatef(star[loop].dist, 0.0, 0.0) // 沿X轴正向移动
gl.Rotatef(-star[loop].angle, 0.0, 1.0, 0.0) // 取消当前星星的角度
gl.Rotatef(-ztilt, 0.0, 0.0, 1.0) // 取消屏幕倾斜
gl.Rotatef(-tilt, 1.0, 0.0, 0.0) // 取消屏幕倾斜
if twinkle { // 启用闪烁效果
// 使用byte型数值指定一个颜色
gl.Color4ub(star[(num-loop)-1].r, star[(num-loop)-1].g, star[(num-loop)-1].b, 255)
gl.Begin(gl.QUADS) // 开始绘制纹理映射过的四边形
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End() // 四边形绘制结束
}
gl.Rotatef(spin, 0.0, 0.0, 1.0) // 绕z轴旋转星星
// 使用byte型数值指定一个颜色
gl.Color4ub(star[loop].r, star[loop].g, star[loop].b, 255)
gl.Begin(gl.QUADS) // 开始绘制纹理映射过的四边形
gl.TexCoord2f(0.0, 0.0)
gl.Vertex3f(-1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 0.0)
gl.Vertex3f(1.0, -1.0, 0.0)
gl.TexCoord2f(1.0, 1.0)
gl.Vertex3f(1.0, 1.0, 0.0)
gl.TexCoord2f(0.0, 1.0)
gl.Vertex3f(-1.0, 1.0, 0.0)
gl.End() // 四边形绘制结束
spin += 0.01 // 星星的公转
star[loop].angle += float32(loop) / num // 改变星星的自转角度
star[loop].dist -= 0.01 // 改变星星离中心的距离
if star[loop].dist < 0.0 { // 星星到达中心了么
star[loop].dist += 5 // 往外移5个单位
//fmt.Println(loop, star[loop].dist)
star[loop].r = uint8(rand.Int() % 256) // 赋一个新红色分量
star[loop].g = uint8(rand.Int() % 256) // 赋一个新绿色分量
star[loop].b = uint8(rand.Int() % 256) // 赋一个新蓝色分量
}
}
}
func drawHex(x, y, kind int, alpha float32) {
if kind == 6 {
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.REPLACE)
starTex.Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0, 0)
gl.Vertex2i(x, y)
gl.TexCoord2f(0, 1)
gl.Vertex2i(x, y+HEX_HEIGHT)
gl.TexCoord2f(1, 1)
gl.Vertex2i(x+HEX_WIDTH, y+HEX_HEIGHT)
gl.TexCoord2f(1, 0)
gl.Vertex2i(x+HEX_WIDTH, y)
gl.End()
} else {
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
var r, g, b float32
switch kind {
case 0:
r = 1
case 1:
g = 1
case 2:
b = 1
case 3:
r = 1
g = 1
case 4:
r = 1
b = 1
case 5:
g = 1 - 222/255
b = 1
}
hexTex.Bind(gl.TEXTURE_2D)
gl.Begin(gl.QUADS)
if alpha < 1 {
gl.Color4f(r, g, b, alpha)
} else {
gl.Color3f(r, g, b)
}
gl.TexCoord2f(0, 0)
gl.Vertex2i(x, y)
gl.TexCoord2f(0, 1)
gl.Vertex2i(x, y+HEX_HEIGHT)
gl.TexCoord2f(1, 1)
gl.Vertex2i(x+HEX_WIDTH, y+HEX_HEIGHT)
gl.TexCoord2f(1, 0)
gl.Vertex2i(x+HEX_WIDTH, y)
gl.End()
}
}
func (sg *OpenGLGraphics) Rect(x, y, w, h int, style chart.Style) {
// log.Panicf("Unimplemented: %s", whoami())
x, y, w, h = chart.SanitizeRect(x, y, w, h, style.LineWidth)
defer glh.OpenGLSentinel()()
//
glh.With(glh.Attrib{gl.ENABLE_BIT | gl.COLOR_BUFFER_BIT}, func() {
glh.ColorC(style.FillColor)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Begin(gl.QUADS)
glh.Squarei(x, y, w, h)
gl.End()
})
if style.LineWidth != 0 {
gl.LineWidth(float32(style.LineWidth))
//log.Print("Linewidth: ", float32(style.LineWidth))
glh.With(glh.Attrib{gl.ENABLE_BIT | gl.COLOR_BUFFER_BIT}, func() {
glh.ColorC(style.LineColor)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Begin(gl.LINE_LOOP)
glh.Squarei(x, y, w, h)
gl.End()
})
}
// linecol := style.LineColor
// if linecol != "" {
// s = fmt.Sprintf("stroke:%s; ", linecol)
// } else {
// linecol = "#808080"
// }
// s += fmt.Sprintf("stroke-width: %d; ", style.LineWidth)
// s += fmt.Sprintf("opacity: %.2f; ", 1-style.Alpha)
// if style.FillColor != "" {
// s += fmt.Sprintf("fill: %s; fill-opacity: %.2f", style.FillColor, 1-style.Alpha)
// } else {
// s += "fill-opacity: 0"
// }
// sg.svg.Rect(x, y, w, h, s)
// GenericRect(sg, x, y, w, h, style) // TODO
}
//Draws all the sprites in the supplied slice
func (sheet SpriteSheet) Draw(sprites []*Sprite) {
gl.Enable(gl.TEXTURE_2D)
sheet.texture.Bind(gl.TEXTURE_2D)
for _, sprite := range sprites {
gl.Begin(gl.TRIANGLE_STRIP)
{
gl.TexCoord2f(sprite.left, sprite.bottom)
gl.Vertex2f(sprite.X, sprite.Y)
gl.TexCoord2f(sprite.left, sprite.top)
gl.Vertex2f(sprite.X, sprite.Y+sprite.H)
gl.TexCoord2f(sprite.right, sprite.bottom)
gl.Vertex2f(sprite.X+sprite.W, sprite.Y)
gl.TexCoord2f(sprite.right, sprite.top)
gl.Vertex2f(sprite.X+sprite.W, sprite.Y+sprite.H)
}
gl.End()
}
sheet.texture.Unbind(gl.TEXTURE_2D)
gl.Disable(gl.TEXTURE_2D)
}
func (pen *Pen) lineTo(x, y int) {
gl.Enable(gl.BLEND)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Color4f(0.0, 0.0, 0.0, 0.1)
gl.Begin(gl.LINES)
var p [2]int
for i := range pen.points {
p = pen.points[i]
if p[0] == 0 && p[1] == 0 {
continue
}
if distanceTo(x, y, p[0], p[1]) < 10.0 {
gl.Vertex2i(x, y)
gl.Vertex2i(p[0], p[1])
}
}
gl.End()
pen.n = (pen.n + 1) % len(pen.points)
pen.points[pen.n][0] = x
pen.points[pen.n][1] = y
pen.moveTo(x, y)
}
// OpenGL draw function
func draw() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Enable(gl.BLEND)
gl.Enable(gl.POINT_SMOOTH)
gl.Enable(gl.LINE_SMOOTH)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.LoadIdentity()
gl.Begin(gl.LINES)
gl.Color3f(.2, .2, .2)
for i := range staticLines {
x := staticLines[i].GetAsSegment().A.X
y := staticLines[i].GetAsSegment().A.Y
gl.Vertex3f(float32(x), float32(y), 0)
x = staticLines[i].GetAsSegment().B.X
y = staticLines[i].GetAsSegment().B.Y
gl.Vertex3f(float32(x), float32(y), 0)
}
gl.End()
gl.Color4f(.3, .3, 1, .8)
// draw balls
for _, ball := range balls {
gl.PushMatrix()
pos := ball.Body.Position()
rot := ball.Body.Angle() * chipmunk.DegreeConst
gl.Translatef(float32(pos.X), float32(pos.Y), 0.0)
gl.Rotatef(float32(rot), 0, 0, 1)
drawCircle(float64(ballRadius), 60)
gl.PopMatrix()
}
}
func (cube *Cube) Render() {
x, y, z := cube.Position.X, cube.Position.Y, cube.Position.Z
gl.Begin(gl.QUADS)
gl.Color3d(0.5-(x/50), 0.5-(y/50), 0.5-(z/50))
// Front Side
gl.TexCoord2f(0, 0)
gl.Vertex3d(x-0.5, y-0.5, z+0.5)
gl.TexCoord2f(1, 0)
gl.Vertex3d(x+0.5, y-0.5, z+0.5)
gl.TexCoord2f(1, 1)
gl.Vertex3d(x+0.5, y+0.5, z+0.5)
gl.TexCoord2f(0, 1)
gl.Vertex3d(x-0.5, y+0.5, z+0.5)
// Left Side
gl.Color3d(0.5-(x/20), 0.5-(y/20), 0.5-(z/20))
gl.TexCoord2f(0, 0)
gl.Vertex3d(x-0.5, y-0.5, z-0.5)
gl.TexCoord2f(1, 0)
gl.Vertex3d(x-0.5, y-0.5, z+0.5)
gl.TexCoord2f(1, 1)
gl.Vertex3d(x-0.5, y+0.5, z+0.5)
gl.TexCoord2f(0, 1)
gl.Vertex3d(x-0.5, y+0.5, z-0.5)
gl.End()
}
// drawCircle draws a circle for the specified radius, rotation angle, and the specified number of sides
func drawCircle(radius float64, sides int) {
gl.Begin(gl.LINE_LOOP)
for a := 0.0; a < 2*math.Pi; a += (2 * math.Pi / float64(sides)) {
gl.Vertex2d(math.Sin(a)*radius, math.Cos(a)*radius)
}
gl.Vertex3f(0, 0, 0)
gl.End()
}
func drawPaddle(x float32, y float32) {
gl.PushMatrix()
gl.Translatef(float32(x), float32(y), 0)
gl.Color3f(1.0, 1.0, 1.0)
gl.Begin(gl.LINE_STRIP)
gl.Vertex2f(0, -5)
gl.Vertex2f(0, 5)
gl.End()
gl.PopMatrix()
}
func drawBall(angle float32, ball_x float32, ball_y float32) {
gl.PushMatrix()
gl.Color3f(1, 1, 1)
gl.Translatef(ball_x, ball_y, 0.0)
gl.Begin(gl.LINE_LOOP)
for rad := 0.0; rad < 1.0; rad += 0.01 {
gl.Vertex2f(
float32(2.0*math.Cos(2.0*math.Pi*rad)),
float32(2.0*math.Sin(2.0*math.Pi*rad)+0.2))
}
gl.End()
gl.Rotatef(angle, 0.0, 0.0, 1.0)
gl.Begin(gl.LINE_STRIP)
gl.Vertex2f(0, 0)
gl.Vertex2f(2, 0)
gl.End()
gl.PopMatrix()
}
func drawQuad(srcwidth, destwidth, srcheight, destheight float32) {
gl.Begin(gl.QUADS)
gl.TexCoord2i(0, 0)
gl.Vertex2f(-1, -1)
gl.TexCoord2i(int(srcwidth), 0)
gl.Vertex2f(-1+destwidth, -1)
gl.TexCoord2i(int(srcwidth), int(srcheight))
gl.Vertex2f(-1+destwidth, -1+destheight)
gl.TexCoord2i(0, int(srcheight))
gl.Vertex2f(-1, -1+destheight)
gl.End()
}
func DrawRTri(Red float64) {
gl.ClearColor(0.2, 0.2, 0.2, 1)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.Color3d(game.Red, 0, 0)
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(0, 0, 0)
gl.Vertex3d(0, 1, 0)
gl.Vertex3d(1, 1, 0)
gl.Vertex3d(1, 0, 0)
gl.End()
}
func display() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Begin(gl.TRIANGLES)
gl.Color3f(0.0, 0.0, 1.0) /* blue */
gl.Vertex2i(0, 0)
gl.Color3f(0.0, 1.0, 0.0) /* green */
gl.Vertex2i(200, 200)
gl.Color3f(1.0, 0.0, 0.0) /* red */
gl.Vertex2i(20, 200)
gl.End()
gl.Flush() /* Single buffered, so needs a flush. */
}
func draw() { // 从这里开始进行所有的绘制
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) // 清除屏幕和深度缓存
gl.LoadIdentity() // 重置当前的模型观察矩阵
gl.Translatef(-1.5, 0.0, -6.0) // 左移 1.5 单位，并移入屏幕 6.0
gl.Begin(gl.TRIANGLES) // 绘制三角形
gl.Vertex3f(0.0, 1.0, 0.0) // 上顶点
gl.Vertex3f(-1.0, -1.0, 0.0) // 左下
gl.Vertex3f(1.0, -1.0, 0.0) // 右下
gl.End() // 三角形绘制结束
gl.Translatef(3.0, 0.0, 0.0) // 右移3单位
gl.Begin(gl.QUADS) // 绘制正方形
gl.Vertex3f(-1.0, 1.0, 0.0) // 左上
gl.Vertex3f(1.0, 1.0, 0.0) // 右上
gl.Vertex3f(1.0, -1.0, 0.0) // 左下
gl.Vertex3f(-1.0, -1.0, 0.0) // 右下
gl.End()
}
func DrawEntity(en Entity) {
x := en.Xpos
y := en.Ypos
r := en.Rot
s := en.Size
col := en.Colour
switch col {
case "grey":
gl.Color3d(0.5, 0.5, 0.5)
case "red":
gl.Color3d(1, 0, 0)
case "green":
gl.Color3d(0, 1, 0)
case "blue":
gl.Color3d(0, 0, 1)
case "lblue":
gl.Color3d(0.3, 0.3, 1)
case "orange":
gl.Color3d(1, 0.5, 0)
case "yellow":
gl.Color3d(1, 1, 0)
case "purple":
gl.Color3d(1, 0, 1)
case "white":
gl.Color3d(1, 1, 1)
default:
gl.Color3d(1, 1, 1)
}
gl.PushMatrix()
gl.Translated(x, y, 0)
gl.Scaled(s, s, s)
//gl.Rotated(r*180/math.Pi, 0, 0, 1)
gl.Rotated(r, 0, 0, 1)
enx := [3]float64{-0.7, 0.7, 0}
eny := [3]float64{1, 1, -1}
//in OpenGL 3.2, the vertices below would be stored on the GPU
//so all you would need to do is say DrawShape(A) or something
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(enx[0], eny[0], 0)
gl.Vertex3d(enx[1], eny[1], 0)
gl.Vertex3d(enx[2], eny[2], 0)
gl.End()
gl.PopMatrix()
}
func drawFrame(screenData *Screen) {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Begin(gl.POINTS)
for i := 0; i < SCREEN_WIDTH; i++ {
for j := 0; j < SCREEN_HEIGHT; j++ {
var pixel Color = screenData[i][j]
gl.Color3d(pixel.Red, pixel.Green, pixel.Blue)
gl.Vertex2i(i, j)
}
}
gl.End()
}
func (t *Texture) PreloadRender() {
t.Bind()
gl.Begin(gl.QUADS)
gl.TexCoord2f(0, 1)
gl.Vertex3f(0, 0, 1)
gl.TexCoord2f(1, 1)
gl.Vertex3f(0, 0, 1)
gl.TexCoord2f(1, 0)
gl.Vertex3f(0, 0, 1)
gl.TexCoord2f(0, 0)
gl.Vertex3f(0, 0, 1)
gl.End()
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.LoadIdentity() // 重置当前矩阵
texture.Bind(gl.TEXTURE_2D)
var x_m, y_m, z_m, u_m, v_m float32
xtrans := -xpos
ztrans := -zpos
ytrans := -walkbias - 0.25
sceneroty := 360.0 - yrot
var numtriangles int
gl.Rotatef(lookupdown, 1.0, 0, 0)
gl.Rotatef(sceneroty, 0, 1.0, 0)
gl.Translatef(xtrans, ytrans, ztrans)
numtriangles = sector1.numtriangles
// Process Each Triangle
for loop_m := 0; loop_m < numtriangles; loop_m++ {
gl.Begin(gl.TRIANGLES)
gl.Normal3f(0.0, 0.0, 1.0)
x_m = sector1.triangles[loop_m].vertex[0].x
y_m = sector1.triangles[loop_m].vertex[0].y
z_m = sector1.triangles[loop_m].vertex[0].z
u_m = sector1.triangles[loop_m].vertex[0].u
v_m = sector1.triangles[loop_m].vertex[0].v
gl.TexCoord2f(u_m, v_m)
gl.Vertex3f(x_m, y_m, z_m)
x_m = sector1.triangles[loop_m].vertex[1].x
y_m = sector1.triangles[loop_m].vertex[1].y
z_m = sector1.triangles[loop_m].vertex[1].z
u_m = sector1.triangles[loop_m].vertex[1].u
v_m = sector1.triangles[loop_m].vertex[1].v
gl.TexCoord2f(u_m, v_m)
gl.Vertex3f(x_m, y_m, z_m)
x_m = sector1.triangles[loop_m].vertex[2].x
y_m = sector1.triangles[loop_m].vertex[2].y
z_m = sector1.triangles[loop_m].vertex[2].z
u_m = sector1.triangles[loop_m].vertex[2].u
v_m = sector1.triangles[loop_m].vertex[2].v
gl.TexCoord2f(u_m, v_m)
gl.Vertex3f(x_m, y_m, z_m)
gl.End()
}
}
func drawScene() {
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) /// 清除屏幕及深度缓存
gl.LoadIdentity() /// 重置模型观察矩阵
gl.Translatef(-1.5, 0, -6) /// 左移 1.5 单位，并移入屏幕 6.0
gl.Rotatef(trisAngle, 0, 1, 0) ///以y为轴 参数:角度,X,Y,Z
gl.Begin(gl.TRIANGLES) /// 绘制三角形
gl.Color3f(1, 0, 0) /// 设置当前色为红色
gl.Vertex3f(0, 1, 0) ///上顶点
gl.Color3f(0, 1, 0) /// 设置当前色为绿色
gl.Vertex3f(-1, -1, 0) /// 左下
gl.Color3f(0, 0, 1) ///设置当前色为蓝色
gl.Vertex3f(1, -1, 0) ///右下
gl.End() ///三角形绘制结束,三角形将被填充。
//但是因为每个顶点有不同的颜色，因此看起来颜色从每个角喷出，并刚好在三角形的中心汇合，三种颜色相互混合。这就是平滑着色。
/// 要让对象绕自身的轴旋转，必须让对象的中心坐标总是(0.0f,0,0f,0,0f),因此这里的四边形是满屏跑的
gl.LoadIdentity() ///将当前点移到了屏幕中心，X坐标轴从左至右，Y坐标轴从下至上，Z坐标轴从里至外。
///OpenGL屏幕中心的坐标值是X和Y轴上的0.0f点。中心左面的坐标值是负值，右面是正值。移向屏幕顶端是正值，移向屏幕底端是负值。移入屏幕深处是负值，移出屏幕则是正值。
gl.Rotatef(quadAngle, 1, 0, 0) /// 以x为轴
gl.Translatef(1.5, 0, -6) ///以当前点为起始点移动?(是的)-6为距离
//gl.Translatef(3, 0, -6); ///右移3单位,看不见?(因为loadIdentity()置中了)
gl.Color3f(0.5, 0.5, 1.0) ///一次性将当前色设置为蓝色
/// @note 顺时针绘制的正方形意味着我们所看见的是四边形的背面
gl.Begin(gl.QUADS) ///绘制正方形
gl.Vertex3f(-1, 1, 0) /// 左上
gl.Vertex3f(1, 1, 0) /// 右上
gl.Vertex3f(1, -1, 0) /// 右下
gl.Vertex3f(-1, -1, 0) /// 左下
gl.End() ///正方形绘制结束
trisAngle += 0.2
quadAngle -= 0.15
glfw.SwapBuffers() ///必须交换显示区才能展现
}
func (t *Texture) Render() {
t.Bind()
xratio := float32(t.width) / float32(t.height)
gl.Begin(gl.QUADS)
gl.TexCoord2f(0, 1)
gl.Vertex3f(-0.5, -0.5, 1)
gl.TexCoord2f(1, 1)
gl.Vertex3f((xratio)-0.5, -0.5, 1)
gl.TexCoord2f(1, 0)
gl.Vertex3f((xratio)-0.5, 0.5, 1)
gl.TexCoord2f(0, 0)
gl.Vertex3f(-0.5, 0.5, 1)
gl.End()
}
func paintSprite(minx int, miny int, maxx int, maxy int, t *system.Texture, index int) {
gl.MatrixMode(gl.TEXTURE)
gl.Begin(gl.QUADS)
gl.TexCoord2d(t.MinX(index), t.MinY(index))
gl.Vertex2i(minx, miny)
gl.TexCoord2d(t.MaxX(index), t.MinY(index))
gl.Vertex2i(maxx, miny)
gl.TexCoord2d(t.MaxX(index), t.MaxY(index))
gl.Vertex2i(maxx, maxy)
gl.TexCoord2d(t.MinX(index), t.MaxY(index))
gl.Vertex2i(minx, maxy)
gl.End()
gl.MatrixMode(gl.MODELVIEW)
}
func (explosion *Explosion) Draw() {
if explosion.IsAlive() {
for l, _ := range explosion.Lines {
gl.Begin(gl.LINES)
for v, _ := range explosion.Lines[l].Shape.Vectors {
gl.Color3d(explosion.Lines[l].Shape.Colors[v].R, explosion.Lines[l].Shape.Colors[v].G, explosion.Lines[l].Shape.Colors[v].B)
explosion.Lines[l].GlVertex2d(explosion.Lines[l].Shape.Vectors[v])
}
gl.End()
}
}
}
func RenderAtlas(a Atlas) {
a.Bind()
xratio := float32(a.Width()) / float32(a.Height())
gl.Begin(gl.QUADS)
gl.TexCoord2f(0, 1)
gl.Vertex3f(-0.5, -0.5, 1)
gl.TexCoord2f(1, 1)
gl.Vertex3f((xratio)-0.5, -0.5, 1)
gl.TexCoord2f(1, 0)
gl.Vertex3f((xratio)-0.5, 0.5, 1)
gl.TexCoord2f(0, 0)
gl.Vertex3f(-0.5, 0.5, 1)
gl.End()
}
func DrawSizeableTri(Tr SizeableTri) {
ax := Tr.Ax
bx := Tr.Bx
cx := Tr.Cx
ay := Tr.Ay
by := Tr.By
cy := Tr.Cy
col := Tr.Colour
switch col {
case "grey":
gl.Color3d(0.5, 0.5, 0.5)
case "red":
gl.Color3d(1, 0, 0)
case "green":
gl.Color3d(0, 1, 0)
case "blue":
gl.Color3d(0, 0, 1)
case "lblue":
gl.Color3d(0.3, 0.3, 1)
case "orange":
gl.Color3d(1, 0.5, 0)
case "yellow":
gl.Color3d(1, 1, 0)
case "purple":
gl.Color3d(1, 0, 1)
default:
gl.Color3d(1, 1, 1)
}
gl.PushMatrix()
// gl.Translated(x, y, 0)
// gl.Scaled(s, s, s)
// gl.Rotated(r, 0, 0, 1)
gl.Begin(gl.TRIANGLES)
gl.Vertex3d(ax, ay, 0)
gl.Vertex3d(bx, by, 0)
gl.Vertex3d(cx, cy, 0)
gl.End()
gl.PopMatrix()
}
func (s *Display) drawFrame(screenData *types.Screen) {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Disable(gl.DEPTH_TEST)
gl.PointSize(float32(s.ScreenSizeMultiplier) + 1.0)
gl.Begin(gl.POINTS)
for y := 0; y < SCREEN_HEIGHT; y++ {
for x := 0; x < SCREEN_WIDTH; x++ {
var pixel types.RGB = screenData[y][x]
gl.Color3ub(pixel.Red, pixel.Green, pixel.Blue)
gl.Vertex2i(x*s.ScreenSizeMultiplier, y*s.ScreenSizeMultiplier)
}
}
gl.End()
glfw.SwapBuffers()
}