func onPaint(sz size.Event) {
gl.ClearColor(rgb(156), rgb(39), rgb(176), 1)
gl.Clear(gl.COLOR_BUFFER_BIT)
var rotationMatrix = []float32{
f32.Cos(-alpha), -f32.Sin(-alpha), 0.0,
f32.Sin(-alpha), f32.Cos(-alpha), 0.0,
0.0, 0.0, 1.0,
}
gl.UseProgram(program)
// setting color
gl.Uniform4f(color, rgb(255), rgb(255), rgb(255), 1)
gl.UniformMatrix3fv(matrixId, rotationMatrix)
gl.Uniform1f(resolutionId, resIndex)
gl.BindBuffer(gl.ARRAY_BUFFER, swasBuffer)
gl.EnableVertexAttribArray(position)
gl.VertexAttribPointer(position, 3, gl.FLOAT, false, 0, 0)
gl.DrawArrays(gl.LINES, 0, 16)
gl.DisableVertexAttribArray(position)
gl.UseProgram(texProgram)
// setting color
gl.Uniform4f(color2, rgb(130), rgb(50), rgb(80), 1)
gl.Uniform1f(resolutionId2, resIndex)
gl.UniformMatrix3fv(matrixId2, rotationMatrix)
gl.BindBuffer(gl.ARRAY_BUFFER, quadBuffer)
gl.EnableVertexAttribArray(position2)
gl.VertexAttribPointer(position2, 3, gl.FLOAT, false, 0, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, quadTexBuffer)
gl.EnableVertexAttribArray(textureCoords)
gl.VertexAttribPointer(textureCoords, 2, gl.FLOAT, false, 0, 0)
gl.Uniform1i(gl.GetUniformLocation(texProgram, "myTexture"), 0)
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, textureId)
gl.DrawArrays(gl.TRIANGLES, 0, 6)
gl.DisableVertexAttribArray(position2)
gl.DisableVertexAttribArray(textureCoords)
if spin == true {
alpha += 0.1
}
if alpha >= 360 {
alpha = 0.0
}
}
func (shape *arena) Draw(camera Camera) {
shader := shape.shader
gl.Uniform3fv(shader.Uniform("material.ambient"), []float32{0.05, 0.0, 0.02})
gl.Uniform3fv(shader.Uniform("lights[0].color"), []float32{0.2, 0.1, 0.1})
gl.Uniform1f(shader.Uniform("lights[0].intensity"), 0.3)
// TODO: Move this into a texture
gl.Uniform1f(shader.Uniform("lights[1].intensity"), 25.0)
gl.Uniform3fv(shader.Uniform("lights[1].position"), []float32{0, 20, 0})
gl.Uniform3fv(shader.Uniform("lights[1].color"), []float32{0.05, 0.0, 0.1})
shape.Node.Draw(camera)
}
func (shape *Line) Draw(camera Camera) {
shader := shape.shader
// Set uniforms
gl.Uniform1f(shader.Uniform("lights[0].intensity"), 2.0)
gl.Uniform3fv(shader.Uniform("lights[0].position"), shape.position[:])
gl.Uniform3fv(shader.Uniform("lights[0].color"), []float32{0.4, 0.2, 0.1})
gl.Uniform3fv(shader.Uniform("material.ambient"), []float32{0.1, 0.15, 0.4})
//gl.Uniform3fv(shader.Uniform("material.diffuse"), []float32{0.8, 0.6, 0.6})
//gl.Uniform3fv(shader.Uniform("material.specular"), []float32{1.0, 1.0, 1.0})
//gl.Uniform1f(shader.Uniform("material.shininess"), 16.0)
//gl.Uniform1f(shader.Uniform("material.refraction"), 1.0/1.52)
gl.BindBuffer(gl.ARRAY_BUFFER, shape.VBO)
stride := shape.Stride()
gl.EnableVertexAttribArray(shader.Attrib("vertCoord"))
gl.VertexAttribPointer(shader.Attrib("vertCoord"), vertexDim, gl.FLOAT, false, stride, 0)
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, shape.Len())
}