From: hgn <hgodden00@gmail.com>
Date: Mon, 26 Jul 2021 21:29:54 +0000 (+0100)
Subject: fish shader/texture
X-Git-Url: https://harrygodden.com/git/?p=fishladder.git;a=commitdiff_plain;h=a3a603f2f1c566948024a0830581efbc80aa9be6

fish shader/texture
---

diff --git a/fishladder.c b/fishladder.c
index e1ca2fa..c44482d 100644
--- a/fishladder.c
+++ b/fishladder.c
@@ -70,6 +70,37 @@ SHADER_DEFINE( tilemap_shader,
 	UNIFORMS({ "uPv", "uTexTiles", "uTexRipples", "uTime", "uOrigin" })
 )
 
+SHADER_DEFINE( fish_shader,
+	// VERTEX
+	"layout (location=0) in vec2 a_co;"	// XY UV
+
+	"uniform mat4 uPv;"
+	"uniform vec3 uPosition;"
+	
+	"out vec2 aTexCoords;"
+	
+	"void main()"
+	"{"
+		"vec2 world_coord = a_co + uPosition.xy;"
+		"gl_Position = uPv * vec4( world_coord.x, 0.0, world_coord.y, 1.0 );"
+		"aTexCoords = vec2( (a_co.x + uPosition.z) * 0.125, a_co.y );"
+	"}",
+	// FRAGMENT
+	"uniform sampler2D uTexMain;"
+	"uniform vec3 uColour;"
+	
+	"in vec2 aTexCoords;"
+	"out vec4 FragColor;"
+	
+	"void main()"
+	"{"
+		"vec4 maintex = texture( uTexMain, aTexCoords );"
+		"vec3 comp = mix( vec3(0.0,0.03,0.04), uColour, maintex.r );"
+		"FragColor = vec4( comp, maintex.g * 0.7 );"
+	"}",
+	UNIFORMS({ "uPv", "uTexMain", "uColour", "uPosition" })
+)
+
 mat4 m_projection;
 mat4 m_view;
 mat4 m_mdl;
@@ -819,6 +850,7 @@ void vg_update(void)
 
 GLuint tile_vao;
 GLuint tile_vbo;
+GLuint fish_texture;
 
 void vg_render(void)
 {
@@ -828,77 +860,6 @@ void vg_render(void)
 	glClearColor( 0.94f, 0.94f, 0.94f, 1.0f );
 	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 	
-	/*
-	glBindVertexArray( tile_vao );
-	
-	SHADER_USE( colour_shader );
-	glUniformMatrix4fv( SHADER_UNIFORM( colour_shader, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
-	
-	for( int y = 0; y < map.y; y ++ )
-	{
-		for( int x = 0; x < map.x; x ++ )
-		{
-			glm_mat4_identity( m_mdl );
-			glm_translate( m_mdl, 
-				(vec3){ 
-					map.origin[0] + (float)x,
-					0.f, 
-					map.origin[2] + (float)y
-				} 
-			);
-			glUniformMatrix4fv( SHADER_UNIFORM( colour_shader, "uMdl" ), 1, GL_FALSE, (float *)m_mdl );
-			
-			struct cell *cell = &map.cells[ y*map.x+x ];
-			
-			vec4 colour = { 0.7f, 0.7f, 0.7f, 1.f };
-			
-			if( cell->flags & CELL_FLAG_INPUT ) glm_vec3_copy( (vec3){ 0.9f,0.5f,0.5f }, colour );
-			else if( cell->flags & CELL_FLAG_OUTPUT ) glm_vec3_copy( (vec3){ 0.5f,0.9f,0.5f }, colour );
-			else if( cell->flags & CELL_FLAG_WALL ) glm_vec3_copy( (vec3){ 0.1f,0.1f,0.1f }, colour );
-			else if( cell->flags & CELL_FLAG_CANAL ) glm_vec3_copy( (vec3){ 0.5f,0.5f,0.8f }, colour );
-			
-			if( cell->flags & CELL_FLAG_SPLIT )
-				glm_vec3_copy( (vec3){ 0.6f, 0.f, 0.9f }, colour );
-			else if( cell->flags & CELL_FLAG_MERGE )
-				glm_vec3_copy( (vec3){ 0.f, 0.6f, 0.8f }, colour );
-			
-			if( map.selected == cell )
-			{
-				if( !map.select_valid )
-					glm_vec3_copy( (vec3){ 1.f, 0.f, 0.f }, colour );
-			
-				float flash = sinf( vg_time*2.5f ) * 0.25f + 0.75f;
-				glm_vec3_scale( colour, flash, colour );
-			}
-						
-			glUniform4fv( SHADER_UNIFORM( colour_shader, "uColour" ), 1, colour );
-			glDrawArrays( GL_TRIANGLES, 0, 6 );
-		}
-	}
-	
-	glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), 1.f, 0.f, 1.f, 1.f );
-	
-	for( int i = 0; i < map.num_fishes; i ++ )
-	{
-		struct fish *fish = map.fishes + i;
-		
-		if( fish->alive )
-		{		
-			glm_mat4_identity( m_mdl );
-			glm_translate( m_mdl,
-				(vec3){
-					map.origin[0] + (float)fish->co[0] + 0.5f,
-					0.1f,
-					map.origin[2] + (float)fish->co[1] + 0.5f
-				}
-			);
-			glm_scale_uni( m_mdl, 0.2f );
-			glUniformMatrix4fv( SHADER_UNIFORM( colour_shader, "uMdl" ), 1, GL_FALSE, (float *)m_mdl );
-			glDrawArrays( GL_TRIANGLES, 0, 6 );
-		}
-	}
-	*/
-	
 	glBindVertexArray( map.tiles_vao );
 	
 	map_update_visual();
@@ -918,12 +879,29 @@ void vg_render(void)
 	glUniform1f( SHADER_UNIFORM( tilemap_shader, "uTime" ), vg_time * 0.5f );
 	
 	glDrawArraysInstanced( GL_TRIANGLES, 0, 6, map.x*map.y );
+	
+	SHADER_USE( fish_shader );
+	glUniformMatrix4fv( SHADER_UNIFORM( fish_shader, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+	glUniform1i( SHADER_UNIFORM( fish_shader, "uTexMain" ), 0 );
+	glActiveTexture( GL_TEXTURE0 );
+	glBindTexture( GL_TEXTURE_2D, fish_texture );
+	glUniform3f( SHADER_UNIFORM( fish_shader, "uPosition" ), 0.0f, 0.0f, floorf( vg_time*20.0f ) );
+	glUniform3f( SHADER_UNIFORM( fish_shader, "uColour" ), 1.0f, 0.1f, 0.1f );
+	
+	glEnable( GL_BLEND );
+	glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+	glBlendEquation( GL_FUNC_ADD );
+	
+	glDrawArrays( GL_TRIANGLES, 0, 6 );
+	
+	glDisable( GL_BLEND );
 }
 
 void vg_register(void)
 {
 	SHADER_INIT( colour_shader );
 	SHADER_INIT( tilemap_shader );
+	SHADER_INIT( fish_shader );
 }
 
 void vg_start(void)
@@ -992,6 +970,10 @@ void vg_start(void)
 	vg_tex2d_nearest();
 	vg_tex2d_repeat();
 	
+	fish_texture = vg_tex2d_rgba( "textures/fishe_swim.tga" );
+	vg_tex2d_nearest();
+	vg_tex2d_repeat();
+	
 	map_load
 	( 
 		"##-#####-##;aaa,aa\n"
diff --git a/textures/fishe_swim.tga b/textures/fishe_swim.tga
new file mode 100644
index 0000000..15f176a
Binary files /dev/null and b/textures/fishe_swim.tga differ