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Drawing triangles using fixed function pipelines

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This commit is contained in:
bloeys
2021-10-23 20:58:10 +04:00
parent b296f1af4c
commit bb9a2885e2
4 changed files with 128 additions and 41 deletions
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41
main.go
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@ -39,7 +39,7 @@ func main() {
defer sdl.GLDeleteContext(glCtx)
initOpenGL()
shaders.LoadShaders()
loadShaders()
//Game loop
for isRunning {
@ -67,11 +67,34 @@ func initOpenGL() {
sdl.GLSetAttribute(sdl.GL_BLUE_SIZE, 8)
sdl.GLSetAttribute(sdl.GL_DOUBLEBUFFER, 1)
gl.ClearColor(0, 0, 0, 1)
sdl.GLSetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_COMPATIBILITY)
// sdl.GLSetAttribute(sdl.GL_CONTEXT_PROFILE_MASK, sdl.GL_CONTEXT_PROFILE_CORE)
}
func loadShaders() {
simpleShader, err := shaders.NewShaderProgram()
if err != nil {
logging.ErrLog.Fatalln("Failed to create new shader program. Err: ", err)
}
vertShader, err := shaders.LoadAndCompilerShader("./res/shaders/simple.vert.glsl", shaders.VertexShaderType)
if err != nil {
logging.ErrLog.Fatalln("Failed to create new shader. Err: ", err)
}
fragShader, err := shaders.LoadAndCompilerShader("./res/shaders/simple.frag.glsl", shaders.FragmentShaderType)
if err != nil {
logging.ErrLog.Fatalln("Failed to create new shader. Err: ", err)
}
simpleShader.AttachShader(vertShader)
simpleShader.AttachShader(fragShader)
simpleShader.Link()
}
func handleInputs() {
input.EventLoopStart()
@ -95,4 +118,20 @@ func runGameLogic() {
}
func draw() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.Begin(gl.TRIANGLES)
gl.Vertex3f(-0.5, 0.5, 0)
gl.Vertex3f(0.5, 0.5, 0)
gl.Vertex3f(-0.5, -0.5, 0)
gl.Vertex3f(0.5, 0.5, 0)
gl.Vertex3f(0.5, -0.5, 0)
gl.Vertex3f(-0.5, -0.5, 0)
gl.End()
window.GLSwap()
}