Lawson English wrote:
Sob... Almost...
Worked my way through everything and now it blows up AFTER reserving
an OGL context (there's an blank rectangle in the window at least)
with the error:
improper store into indexable object
my bad. Was at
', (framesPerSec truncateTo: 0.1),
in line
ogl drawString: frames printString, ' frames: ', (framesPerSec
truncateTo: 0.1), ' fps'
at: 0...@font hei...@0 font: font color: Color black.
in OpenGL>>example
example "OpenGL example"
"A very simple OpenGL example"
| ogl frames startTime deltaTime framesPerSec bounds font |
font := StrikeFont familyName: 'Atlanta' pointSize: 11.
bounds := 0...@0 extent: 4...@400.
ogl := OpenGL newIn: bounds.
ogl ifNil:[^self error: 'Unable to create renderer'].
[frames := 0.
startTime := Time millisecondClockValue.
[Sensor anyButtonPressed] whileFalse:[
"start counting at second frame since first frame is penalized
by the upload of the bitmap font outside of ogl."
frames = 1 ifTrue:[startTime := Time millisecondClockValue].
ogl beginFrame.
"--- this is the actual scene content ---"
ogl glDisable: GLDepthTest. "for the simple example only"
ogl glDisable: GLLighting. "for the simple example only"
ogl glClearColor: 1.0 with: 1.0 with: 1.0 with: 1.0.
ogl glClear: GLColorBufferBit.
ogl glRotatef: 5.0 with: 0.0 with: 0.0 with: 1.0.
ogl glColor3f: 1.0 with: 0.0 with: 0.0.
ogl glBegin: GLPolygon.
ogl glVertex2f: -0.7 with: -0.7.
ogl glVertex2f: 0.7 with: -0.7.
ogl glVertex2f: 0.7 with: 0.7.
ogl glVertex2f: -0.7 with: 0.7.
ogl glEnd.
"--- here is the 2d overlay setup ---"
ogl glMatrixMode: GLProjection.
ogl glPushMatrix.
ogl glLoadIdentity.
ogl glMatrixMode: GLModelview.
ogl glPushMatrix.
ogl glLoadIdentity.
ogl glTranslated: -1 with: 1 with: 0.0.
ogl glScaled: (2.0 / bounds width) with: (-2.0 / bounds height)
with: 1.0.
ogl glDisable: GLDepthTest.
ogl glEnable: GLBlend.
ogl glBlendFunc: GLOne with: GLOneMinusSrcAlpha.
"--- here is the 2d overlay rendering ---"
deltaTime := Time millisecondsSince: startTime.
framesPerSec := frames * 1000 / (deltaTime max: 1) asFloat.
"@@@@: Fixme. It appears as if #drawString: depends on
glColor being set.
Makes no sense but I'm not going to figure this out - probably
some mishap
wrt. GLLighting being disabled."
ogl glColor3f: 0.0 with: 0.0 with: 0.0.
ogl drawString: frames printString, ' frames: ', (framesPerSec
truncateTo: 0.1), ' fps'
at: 0...@font hei...@0 font: font color: Color black.
ogl glDisable: GLBlend.
ogl glMatrixMode: GLModelview.
ogl glPopMatrix.
ogl glMatrixMode: GLProjection.
ogl glPopMatrix.
ogl glMatrixMode: GLModelview.
"--- end the end frame operations"
ogl endFrame.
ogl swapBuffers.
frames := frames + 1.
].
] ensure:[ogl destroy].
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