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This commit is contained in:
lerabot 2019-03-21 12:16:54 -04:00
parent 34163498bd
commit f128efad6b
2 changed files with 7 additions and 59 deletions
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12
samples/depth_funcs_alpha_testing/gl_png.c
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@ -217,18 +217,6 @@ void draw_textured_quad(texture *tex) {
0.0, 0.0, 1.0
};
/*
glBindTexture(GL_TEXTURE_2D, tex->id); // choose the texture to use.
glBegin(GL_QUADS); // begin drawing a cube
// Front Face (note that the texture's corners have to match the quad's corners)
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 0.0f); // Bottom Left Of The Texture and Quad
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 0.0f); // Bottom Right Of The Texture and Quad
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 0.0f); // Top Right Of The Texture and Quad
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 0.0f); // Top Left Of The Texture and Quad
glEnd();
*/
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, tex->id);
glEnableClientState(GL_VERTEX_ARRAY);

54
samples/depth_funcs_alpha_testing/main.c
View File

@ -1,4 +1,3 @@
#include "gl.h"
#include "glu.h"
#include "glkos.h"
@ -16,7 +15,6 @@ float xrot, yrot, zrot;
/* A general OpenGL initialization function. Sets all of the initial parameters. */
void InitGL(int Width, int Height) // We call this right after our OpenGL window is created.
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // This Will Clear The Background Color To Black
glClearDepth(1.0); // Enables Clearing Of The Depth Buffer
glShadeModel(GL_SMOOTH); // Enables Smooth Color Shading
@ -26,20 +24,6 @@ void InitGL(int Width, int Height) // We call this right after our OpenG
gluPerspective(45.0f,(GLfloat)Width/(GLfloat)Height,0.1f,100.0f); // Calculate The Aspect Ratio Of The Window
glEnable(GL_TEXTURE_2D);
glMatrixMode(GL_MODELVIEW);
/*
//FROM REAPERI CYCLE
GLfloat modelAmbient[4] = {0.8, 0.8, 0.8, 1.0};
GLfloat ambient[4] = {0.2, 0.2, 0.2, 1.0};
GLfloat diffuse[4] = {1.0, 1.0, 1.0, 1.0};
GLfloat specular[4] = {0.0, 0.0, 0.0, 1.0};
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_AMBIENT, modelAmbient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
//glDisable(GL_COLOR_MATERIAL);
*/
}
/* The function called when our window is resized (which shouldn't happen, because we're fullscreen) */
@ -77,7 +61,7 @@ void DrawGLScene()
glLoadIdentity(); // Reset The View
//FIRST DRAW - red quad
//First Batch is alpha blending
glTranslated(-1 ,0, -5);
for (int i = 0; i < 5; i++) {
glTranslated(0.5, 0, 0);
@ -88,49 +72,23 @@ void DrawGLScene()
}
//Second batch is depth testing
//Changing the translate Z value doesn't change anything?
glLoadIdentity();
glTranslated(-1 , -1, -5);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_FUNC);
for (int i = 0; i < 5; i++) {
glTranslated(0.5, 0, +0.2);
glTranslated(0.5, 0, -0.2);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
draw_textured_quad(&t);
glDisable(GL_BLEND);
}
glDisable(GL_DEPTH_TEST);
/*
glTranslated(0, 0, -10);
//DepthTest!
glTranslated(0, 0, 0);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
draw_textured_quad(&t);
glDisable(GL_DEPTH_TEST);
//Hum... wait what?
glTranslated(1, 0, -0.5);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
draw_textured_quad(&t);
glDisable(GL_DEPTH_TEST);
//I don,t get anything anymore
glTranslated(-1, 0, -0.5);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
draw_textured_quad(&t);
glDisable(GL_DEPTH_TEST);
*/
// swap buffers to display, since we're double buffered.
glKosSwapBuffers();
}
@ -139,6 +97,8 @@ int main(int argc, char **argv)
{
glKosInit();
InitGL(640, 480);
//loads a dtex texture. see the /romdisk folder for more files
dtex_to_gl_texture(&t, "/rd/disk_1555.dtex");
ReSizeGLScene(640, 480);
DrawGLScene();