func initResources() {
var err os.Error
// Load shaders
vs, err = createShader("triangle.v.glsl", VertexShaderType)
if err != nil {
fmt.Printf("Shader: %s\n", err)
return
}
fs, err = createShader("triangle.f.glsl", FragmentShaderType)
if err != nil {
fmt.Printf("Shader: %s\n", err)
return
}
// Create GLSL program with loaded shaders
program = gl.CreateProgram()
program.AttachShader(vs)
program.AttachShader(fs)
program.Link()
infoLog := program.GetInfoLog()
if len(infoLog) != 0 {
fmt.Printf("Program: %s\n", infoLog)
}
// Generate a buffer for the VertexBufferObject
vboTriangle = gl.GenBuffer()
vboTriangle.Bind(gl.ARRAY_BUFFER)
// Submit the vertices of the triangle to the graphic card
gl.BufferData(gl.ARRAY_BUFFER, len(triangleAttributes)*4, triangleAttributes, gl.STATIC_DRAW)
// Unset the active buffer
gl.Buffer(0).Bind(gl.ARRAY_BUFFER)
// Get the attribute location from the GLSL program (here from the vertex shader)
attributeName := "coord2d"
attributeCoord2d = program.GetAttribLocation(attributeName)
if attributeCoord2d == -1 {
fmt.Printf("Could not bind attribute %s\n", attributeName)
}
attributeName = "v_color"
attributeColor = program.GetAttribLocation(attributeName)
if attributeColor == -1 {
fmt.Printf("Could not bind attribute %s\n", attributeName)
}
uniformName := "fade"
uniformFade = program.GetUniformLocation(uniformName)
if uniformFade == -1 {
fmt.Printf("Could not bind uniform %s\n", uniformName)
}
}
func initResources() {
var err os.Error
// Load shaders
vs, err = createShader("cube.v.glsl", VertexShaderType)
if err != nil {
fmt.Printf("Shader: %s\n", err)
return
}
fs, err = createShader("cube.f.glsl", FragmentShaderType)
if err != nil {
fmt.Printf("Shader: %s\n", err)
return
}
// Create GLSL program with loaded shaders
program = gl.CreateProgram()
program.AttachShader(vs)
program.AttachShader(fs)
program.Link()
infoLog := program.GetInfoLog()
if len(infoLog) != 0 {
fmt.Printf("Program: %s\n", infoLog)
}
for i := 1; i < 6; i++ {
cubeTexCoords = append(cubeTexCoords, cubeTexCoords...)
}
vboCubeTexCoords = gl.GenBuffer()
vboCubeTexCoords.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(cubeTexCoords)*4, cubeTexCoords, gl.STATIC_DRAW)
gl.Buffer(0).Bind(gl.ARRAY_BUFFER)
vboCubeVertices = gl.GenBuffer()
vboCubeVertices.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, len(cubeVertices)*4, cubeVertices, gl.STATIC_DRAW)
gl.Buffer(0).Bind(gl.ARRAY_BUFFER)
// Generate a buffer for the IndexBufferObject
iboCubeElements = gl.GenBuffer()
iboCubeElements.Bind(gl.ELEMENT_ARRAY_BUFFER)
// Submit the indexes to the graphic card
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, len(cubeElements)*2, cubeElements, gl.STATIC_DRAW)
// Unset the active buffer
gl.Buffer(0).Bind(gl.ELEMENT_ARRAY_BUFFER)
// Get the attribute location from the GLSL program (here from the vertex shader)
attributeName := "coord3d"
attributeCoord3d = program.GetAttribLocation(attributeName)
if attributeCoord3d == -1 {
fmt.Printf("Could not bind attribute %s\n", attributeName)
}
attributeName = "texcoord"
attributeTexCoord = program.GetAttribLocation(attributeName)
if attributeTexCoord == -1 {
fmt.Printf("Could not bind attribute %s\n", attributeName)
}
uniformName := "mvp"
uniformMTransform = program.GetUniformLocation(uniformName)
if uniformMTransform == -1 {
fmt.Printf("Could not bind attribute %s\n", uniformName)
}
uniformName = "mytexture"
uniformTexture = program.GetUniformLocation(uniformName)
if uniformTexture == -1 {
fmt.Printf("Could not bind attribute %s\n", uniformName)
}
// Load texture
texture, err = openSurface("texture.jpg")
if err != nil {
fmt.Printf("Texture: %s\n", err)
return
}
}